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In recent years, the development of greenhouses in various suburbs, especially in the outskirts of cities, has been very rapid. This is mainly because the production method is an intensive cultivation method with high input, high output, and high efficiency. However, during the greenhouse production process, the soil was covered with long-term membranes, direct sunlight and rainwater leaching were not obtained, and the plant structure was single. This led to the imbalance of nutrients in the soil and affected the yield and quality of horticultural plants. This is a problem that the greenhouse horticultural production is facing and needs to solve. Soil nutrient analysis in greenhouses can be analyzed using soil NPK detectors. According to the soil nitrogen, phosphorus and potassium detector test, under the same fertilizing amount, the salt content of plough layer soil produced by greenhouses is 4 times that of open field production. The fertilizer applied in greenhouses is not leached by rainwater. In addition to the loss of a small portion of the crop that was absorbed by the crop in the season, all unused nutrients were trapped in the soil, so the soil solution concentration was much higher than in the open field under the same fertilization amount, and due to the capillary As a result, soil moisture moves upwards, causing salt to concentrate in the cultivating layer, which results in salinization of the soil produced in the shed, and in cultivating vegetables and other horticultural crops in soils with high salinity content, due to the high osmotic pressure of the soil solution, the roots of the crop Absorption of soil moisture and nutrients is difficult, affecting the normal growth of crops, and severe rooting of seedlings. According to the survey results of soil NPK indicator, there is a trend of increasing acidity in the soil produced in greenhouses. In particular, continuous production of greenhouses for many years, the residual nitrogen in the soil under the action of microorganisms, accumulated in a large amount of nitric acid, causing changes in the soil reaction. Practice shows that, after many years of continuous application of sulfuric acid, chlorination, and other physiological acidic fertilizers, the soil acidification is rapid, and the pH value drops significantly, which constitutes a soil obstacle for the cultivation of horticultural crops such as vegetables. After detailed analysis of the soil nutrient in the greenhouse by soil NPK indicator, it also has some understanding of the measures for fertilization. The organic fertilizer produced in the greenhouse is preferably organic cellulose with a high cellulose and nitrogen ratio. The deep application of basal fertilizer and the limitation of topdressing shall be implemented. When chemical fertilizer is used as the base fertilizer, it is necessary to carry out deep application. It is better to apply chemical fertilizer and organic fertilizer on the surface and then plow till the most of the fertilizer is applied to the topsoil so as not to increase too much of the topsoil. Salt content. Composting is generally difficult to implement deeply, so it is necessary to strictly control the amount of use, rather use the method of increasing the number of top dressings, try to [eat less meals" to meet the vegetable's demand for nutrients.

1. Microbial pesticides 1. Bacillus thuringiensis: dosage form 100, 15 billion live spores/g wettable powder and 10 billion live spores/ml suspension agent, mainly used for controlling cotton bollworm, tobacco budworm, diamondback moth, cabbage caterpillar and other lepidopter Target pests. Taking the suspending agent as an example, the preparation of 150ml-400ml per acre is sprayed in the lower larval stage of the pest (the amount of water is 30kg/mu-60kg/mu, the same below), and the application effect above 30°C is best. Precautions (the same below): Can not be mixed with systemic organophosphorus pesticides or fungicides. It should not be used in silkworm areas. It should be stored in a dry and cool warehouse below 25 °C to prevent exposure and moisture. 2, Beauveria bassiana: the dosage form is 8 billion live spores/g wettable powder, which has good control effect against lepidopteran pests such as Plutella xylostella and Pieris rapae. The dosage of 150g-300g per acre is good for water spray in the lower larval stage of pests. 3. Penicillium: The dosage form is 10 billion live spores/g wettable powder. It is mainly used to control pests such as aphids, cabbage caterpillars, cotton bollworms and white pelicans. 200g-250g per acre of preparation, sprayed with water or mixed with fine soil 20kg-25kg. 4, Myxovirus Su Yun: The preparation is 1000PIB/mg Myovirus 16000IU/mg Bacillus thuringiensis wettable powder, 50g-70g per acre, and water spray to control lepidopteran pests such as vegetable diamondback moth and cabbage caterpillar. 5, vegetable virus Su Yun: preparation for 1000PIB / mg vegetable virus · 16000IU / mg Bacillus thuringiensis wettable powder, 50g-70g per acre, water spray to control vegetable Plutella xylostella, cabbage caterpillar and other lepidopteran pests . 6. Sweet nuclear virus Su Yun: The preparation is 1000PIB/mg sweet nucleus virus · 16000 IU/mg Bacillus thuringiensis wettable powder, 70g-100g per acre, and water spray to control lepidopteran pests such as beet armyworm. 7. Trichoderma: The preparation is 200 million live spores/g wettable powder (Trick), and the preparation is 125g-250g per acre, and the water spray is used to control gray mold. 8, Pseudomonas: the dosage form is 200 million live spores / ml of water (Ye Fu Li), 500 times -800 times liquid leaf spray to control anthrax. 9. Plutella xylostella granule virus: The preparation is 4 billion PIB/g wettable powder, 150g-200g per acre, and the water spray is used to control the vegetable Plutella xylostella. Precautions (the same below): Store in a dry and cool warehouse below 25 °C to prevent exposure and moisture. 10, Helicoverpa armigera nuclear polyhedrosis virus: the preparation is 2 billion PIB / ml suspension, 50ml-75ml per acre, spray control cotton bollworm. 11. Spodoptera litura nuclear polyhedrosis virus: The preparation is 1 billion PIB/g wettable powder, 40g-50g per acre, and the water spray is used to control the vegetable Spodoptera litura. Second, microbial source biochemical pesticides 1, avermectin: dosage forms are 0.2%, 0.5%, 0.6%, 0.9%, 1%, 1.8%, 2%, emulsifiable concentrate, 0.1%, 0.5% wettable powder. Taking 1.8% emulsifiable concentrate as an example, the preparation of 20ml-25ml per acre is used to control the pests such as red spider, aphid, cabbage caterpillar and diamondback moth. Avoid inhalation and skin contact when applying drugs to avoid contamination of water sources and ponds. 2, Liuyangmycin: common dosage form is 10% emulsifiable concentrate, generally diluted 1000 times liquid - 2000 times liquid spray, effective for pests such as Lepidoptera, Coleoptera, Homoptera, Liriomyza, and other species of spider mites Good contact killing effect also has a certain inhibitory effect on licking eggs. Low toxicity to humans and animals, safe for plants and a variety of natural enemies. 3, antibiotics (agricultural anti-120): the preparation has 2%, 4% water, 2% water per acre 300ml-500ml, every 15 days -20 days foliar spray 1 time to prevent powdery mildew. Precautions (the same below): Do not mix with alkaline pesticides, should be stored in a dry, cool place. 4. Jinggangmycin: The preparation has 3%, 5%, 20% wettable powder, 3%, 5%, 10%, 20% aqueous agent. Take 5% water agent as an example, use 100ml-130ml per acre of preparation, foliar spray to prevent sheath blight and so on. 5, streptomycin: 10%, 24%, 68%, 72% of the agricultural streptomycin sulfate wettable powder, 72% agricultural streptomycin sulfate wettable powder, for example, 15g-20g per acre, Foliar spray, prevention and control of soft rot. 6 Wuyincin: The preparation is 1% agricultural Wuyimycin water, 500ml-750ml per acre, spray on water leaf surface, and has good control effect on powdery mildew. 7. Oxytetracycline hydrochloride: The preparation is 88% wettable powder, and the preparation of 35g-50g per acre is used to prevent soft rot on water leaf spray. 8. Mushroom proteoglycan: The preparation is 0.5% water (viral ning), 165ml-200ml per acre, sprayed on water to prevent viral diseases. 3. Plant-derived biochemical pesticides 1. Nicotine: 10% nicotine emulsifiable concentrate, 50ml-75ml per acre, spray on water, control aphids; 27% saponin/nicotine water, diluted 800 times spray to control red spider , beetle; 30% tea saponin · nicotine water, 75ml-100ml per acre, spray against water aphids; 1.2% smoke · ginseng emulsifiable concentrate, 350ml-500ml per acre to control aphids, cabbage caterpillars, red Spider; 0.6% wood nicotine emulsifiable concentrate, 85ml-100ml per acre, and spray against water to control pests such as cotton bollworm. Precautions (the same below): Be sure to be even and thoughtful when spraying. Do not mix with strong acid and alkali pesticides. Store in a dark, cool and dry place. 2, matrine: the preparation is 0.3% water, 65ml-150ml per acre of preparation, water spray to control aphids, cabbage caterpillars, spider mites; 1.1% wettable powder, 2kg-3kg per acre with water, It can prevent root lice. 3. Resveratrol: The dosage form is 0.5% alcohol solution soluble liquid agent, 75ml-100ml per acre, and water spray to control aphids, cabbage caterpillars, cotton bollworms, etc. 4. Artemisinin: The dosage form is 0.65% water agent, and the preparation is 100ml-150ml per acre. The water spray is used to control aphids and cabbage caterpillars. 5, celangulin: dosage form is 0.3% emulsifiable concentrate, 300ml-500ml per acre, water spray to control Plutella xylostella, cabbage caterpillar and so on. 6. Alizarin: The dosage form is 0.23% water, and the preparation is 70ml-100ml per acre. The water spray is used to control pests such as Plutella xylostella and Pieris rapae. 7. The twisting of the different angles: the dosage form is 0.05% water (Lvbao No.1), and the preparation is 40ml-60ml per acre, and the water spray is used to control pests such as cabbage caterpillars. 8. Hundreds of ··Smoke: The dosage form is 1.1% emulsifiable concentrate, and each time the preparation is 70ml-100ml, the water spray is used to control pests such as aphids, cabbage caterpillars, diamondback moths, and spotted flies.

Now is the peak season for sales and use of chemical fertilizers in spring cultivation. In order to prevent the purchase of counterfeit products, according to the characteristics of fake fertilizers in the market, several simple identification methods are introduced: 1, see the packaging. Where qualified chemical fertilizers are produced by regular manufacturers, their packaging bags are usually marked with the product name, nutrient content, net weight, and origin etc.; false degraded fertilizers have rough packaging and high breakage rates; signs are incomplete or illegible, and sometimes Do not use Pinyin for Chinese characters to impersonate imported fertilizer. 2, see the price. As the saying goes: "Cheap without good goods." The price of fake fertilizers is generally lower than the price of similar high-quality fertilizers on the market. 3, see the variety. Pseudo-deteriorating fertilizers are generally based on compound fertilizers (such as diammonium phosphate, etc.), urea, superphosphate, liquid fertilizers, and foliar fertilizers. When buying these chemical fertilizers, special care must be taken; ammonium bicarbonate and other fertilizers are on the market. Few fakes appear. 4, look at the appearance. Different chemical fertilizers often have different appearance characteristics, such as ammonium bicarbonate is white, with a strong ammonia odor; urea, ammonium sulfate, ammonium nitrate, ammonium chloride are all white granular crystals; calcium carbonate is gray powder, there are Sour taste; three-material superphosphate is a greenish gray, large and uniform particles, no odor; calcium magnesium phosphate fertilizer is a white powder, no odor; potassium sulfate is a white powder crystal, no odor; Diammonium phosphate is yellow gray or iron Gray particles, uneven particle size, volatile in wet environments, ammonia smell. In addition, ammonium sulfate such as ammonium sulfate, ammonium nitrate, and ammonium chloride, and ammonium phosphate such as diammonium phosphate compound fertilizers are obviously placed on palms with a small amount of grass ash (or alkali or lime). Ammonia smell. If the fertiliser encountered is obviously inconsistent with its characteristics, it can be concluded that it is a fake deteriorating fertilizer.

The United States greenhouse is mainly used for flower production. The top of the greenhouse is mostly round arched, and a few are roofed. The characteristics of the greenhouse are as follows: External structure of the greenhouse The greenhouse structural material is aluminum alloy. The materials are firm and durable, and the internal space of the greenhouse is large. The span of the greenhouse is 10-20 meters and the length can be 40-60 meters, which is convenient for mechanized operation. The greenhouse is covered with a polyethylene reinforced double inflatable membrane. It is sealed on brackets and trusses with clips or pressure rings. The inflated thickness between the two layers of the film can be about 2.5-5 mm. It is said that this kind of greenhouse can save heat energy by 40%-90 as compared with general glasshouse due to its good sealing performance. %. In addition, due to the smooth and elastic film surface after inflation of the double-layer film, it is more resistant to storms, rain, and snow. Greenhouse internal facilities Greenhouse internal cultivation beds are movable, the cultivation beds are about 0.8 meters away from the ground and can move in both directions along the slide rails. When moving to both ends of the greenhouse, the cultivation beds can also be moved to the above-mentioned concentration by hydraulic devices. Rails are perpendicular to the rails. In order to save space, the top of the greenhouse is equipped with potted hooks, the calendar hooks are fixed on the steel ropes, and the brackets are connected with the trusses. The steel cable is driven by a motor and the position of the potted plants can be controlled at any time to avoid affecting the flowers underneath. . Greenhouse heating equipment can be adapted to steam, hot water, fuel oil, natural gas and other thermal heating. In winter, the internal heating adopts the heating method combining coil and spray; in the summer, the wet pad or spray cooling is used; the winter supplement light source uses high-pressure sodium or metal halide lamps; spray irrigation or drip irrigation is used. All the above parameters are collected by the environment control computer system according to the various transmission devices installed inside and outside the greenhouse, analyzed and decided by the computer, and then the instructions are issued for automatic control.

With the maturation of Internet of Things technology, people`s enthusiasm for the application of agriculture and forestry internet of things in agriculture and forestry is increasing. In many of China`s agricultural demonstration parks, there are examples of the application of agriculture and forestry internet of things technology. This shows that modern People have great expectations for the transformation of agriculture and forestry and internet of things to realize the transformation of agricultural science and technology. On the other hand, it also shows that agricultural production is entering the stage of precision agriculture, and precision agriculture is the new trend of agricultural development in the world today. The agriculture and forestry internet of things is an important technical force for realizing accurate agriculture. In agricultural production, the purpose of the application of the Agriculture and Forestry Internet of Things is to mobilize the production enthusiasm of agriculture, adjust the investment in crops through the soil properties of crop growth, that is, through the strength of science and technology, both the spatial variability of soil properties and productivity within the field block can be identified. Also determine the production targets of crops, carry out the positioning of [systematic diagnosis, optimization of formulas, technology assembly, and scientific management" to mobilize the soil productivity, achieve the same or higher income with the least or most economical investment, and improve the environment. Use various types of agricultural resources to achieve economic and environmental benefits. With the in-depth development of agriculture, forestry, and internet of things in agriculture, the agriculture and forestry internet of things has played a huge role in many areas of agriculture, including agricultural environmental monitoring, weather monitoring, greenhouse control, water-saving irrigation, product safety and traceability. , equipment intelligent diagnosis management and so on. Through the technological innovations carried out by the Agriculture and Forestry Internet of Things, further upgrades have been made to facilities agriculture, farm crops, field stations, and factory farming. It has laid a good foundation for the development of modern agriculture, not only providing guarantees for the sustainable development of modern agriculture, but also making consumers profitable, which has greatly enhanced the confidence of our people in China's agriculture.

The decoration style of the living room can best reflect the taste of the owner in the home. The living room wall is too monotonous to look good. It is too exaggerated to look good. It is quite good to watch a lot of people decorating the sofa behind the sofa. The living room decoration flower stand plays an important role in decorating the living room. In the flower racks of many materials, how to choose the flower stand, what are the performance characteristics of various flower stands? Next, let's take a look at the related content of the home of the decoration home network! 1, solid wood multi-layer large flower stand. It is not just an ordinary folding flower stand, it is the ultimate expression of green life. The whole flower stand and the plants on the balcony are very harmonious, full of elegant art and stop. 2, Nanzhu floor living room multi-storey large flower stand. The stepped balcony flower stand has the advantage that its load-bearing capacity is very strong, especially suitable for placing some large flowers. With such an atmospheric appearance, it is enough to have such a primitive and simple design. 3, small solid wood flower stand. It is made of pine wood imported from New Zealand. Although it has only two small floors, it is practical, exquisite and beautiful. It is suitable for small balcony decoration for small houses. Is the shape very creative? 4, landing multi-layer flower stand. The biggest advantage of the solid wood flower stand is that each one has its own unique taste. It is a gift from nature. Although there are many layers, the load is very strong and the most important thing is foldable. 5, floor folding solid wood flower stand. The two-way design of the practical atmosphere, more items can be accommodated, the fence-like design, the bamboo material brings a sense of clean and simple pastoral, just like a breeze blowing through the clear, makes people feel comfortable. 6, simple bicycle flower stand. In addition to being placed on the balcony, even in the bedroom, it is very elegant and has an atmosphere. It is more meditation in the study. If you are a big man, if you have nothing, it will be fashionable and tasteful, so that the mind can dance with the garden. 7, modern minimalist creative hanging flower stand. The flower stand on the ground sees much more, and occasionally a wall-mounted flower stand can make people shine. Very three-dimensional feeling, the shape of the flower stand can be arbitrarily assembled according to your own ideas, the corner, living room, balcony, window sill can be installed. 8, desktop flower stand. It makes you believe that a pot of flowers is a world, and a pot of flowers can be beautiful. Anti-rust paint wrought iron flower stand, health and environmental protection is more assured, the simplest is sometimes more attractive. The above is a detailed answer to the Xiaobian, I don't know if you are satisfied with the introduction of the decoration home network Xiaobian~ If you want to know more about the exciting content, please continue to pay attention to our decoration encyclopedia! More related wonderful reading: Living room decorative flower stand price living room decoration flower stand matching skills

Many people are very concerned about the quality of life. In order to make their life more interesting, many people will put some flowers and plants on their balcony. They are in their own homes, on the windowsill, they have a few pots themselves. Love the flowers, fertilize them, a nd feel good. Next, follow the decoration home network Xiaobian to learn about the indoor balcony flower stand shopping method, the indoor balcony flower stand placement skills related content! Indoor balcony flower stand purchase method: Color matching of plant flower stand There are many types of small-sized balcony flower stands. There are wooden and wrought iron materials in terms of materials. The wooden flower stands are more versatile. It is very suitable for simple style or rustic style, which can bring more natural indoors. Breath, very fresh and fresh. The wrought iron flower stand is thicker than the wooden flower stand. It feels more dignified but it is very suitable for the European style home. It has an artistic sense of style, and the steady color is also in line with the European style. Flower stand to match with plants In addition to considering whether the texture and style of the small-sized balcony flower stand are matched, it is desirable to have a beautiful appearance and a good visual effect, and also pay attention to the combination of the flower stand and the plant. For example, if the plant in your home is a spider plant, you must choose some height of the flower stand as a placement point. If the home conditions permit, then choose some wall-mounted flower stands. If it is a plant bonsai, then you should consider whether you can use a mobile flower stand, which is also convenient for the movement of the landscape pot, you can move around, and it is convenient for plants to see the sun. Flower stand also needs to be both practical and beautiful The choice of small-sized balcony flower stands can not be used only in the middle. In fact, many flower stands not only put flowers, but also can put books, telephones, furnishings, etc., which is more practical. If you like the style more complicated, you can choose more partitions, you can put more things, if you like the simple flower rack, but also to match the overall style of the home, then choose the style is simple, or slanting on the guardrail That way, you can save more space. If you don't have a green plant, it will be very monotonous, so it's more fun to play with flowers and plants when you're fine. Put them on the ground and easily stain the floor, so choose a reliable flower stand! Indoor balcony flower stand placement skills Due to the size and weight of the balcony, the furniture on the balcony should choose lightweight folding furniture. The balcony is the most suitable place for families to plant various flowers and plants. Potted plants can be placed on the balcony, but please pay attention to safety. A guardrail should be added to prevent the flower pot from falling and hurting people. Vertical ropes, plastic pipes, etc. can also be erected to plant climbing plants such as grapes and ivy. On the one hand, it beautifies the balcony and can be used to shade the sun in summer. In addition to the role of green plants, flowers and other decorative balconies, the side walls and floors of the balconies are also the focus of decoration and beautification. For example, decorations with decorative charm such as ceramic wall hangings, hanging plates, and sculptures can be placed on the neat side walls, and some partition walls can also be made into shelves for placing decorations. On the smooth and elegant walls, it can also be decorated with fabrics woven from firewood, hoes, brown, hemp, corn husks, etc. The ground of the balcony can be decorated with old carpets or other materials. Add comfort when walking.

If there is a yard in the place where everyone lives, many people will choose to put a small yard flower stand in the yard and decorate the yard. We call it the garden flower stand . Having a courtyard is generally an urgent desire of many people. As you can imagine, the courtyard is very desirable. The most important content in the courtyard, apart from the beautiful flowers, is of course the flower stand in the courtyard! It is very emotional to place the flower stand in the courtyard. Let's take a look at the decoration of the garden. The contents of the garden flower stand precautions! First, how to do the garden flower stand? 1. Flower stand opening and deepening The general design is between 3~4m, which is too big, and the construction is awkward and swollen. The depth span is usually 2.7m, 3.0m, 3.3m. 2, the height of the flower stand Controlled at 2.5~2.8m, there is a sense of pro, but generally 2.3m, 2.5m, 2.7m and other dimensions. 3, flower stand and green combination Before the green shades are grown, the flower stands themselves must be durable. In addition to the proper proportion of the scales, the line-and-foot pattern decoration of the flower stand should be emphasized. The cross section of the columns should also be avoided as much as possible. good. Second, the garden flower stand design points 1. The flower stand should be designed as a piece of art, not just as a structure. Pay attention to the proportion, material selection and necessary decoration. The shape of the flower stand should not be too large, too large to be light and easy to make, too high, not easy to shade and open, as close as possible to nature. 2. According to the characteristics and environment of the climbing plants, the shape of the flower stand is conceived; according to the biological characteristics of the climbing plants, the structure and materials of the flower stand are designed. 3. Under normal circumstances, a flower stand is equipped with a climbing plant, and 2-3 kinds of complementary plants can also be seen. The ornamental value and growth requirements of various climbing plants are not the same, and you need to know before designing the flower stand. 4, around the four sides of the flower stand should be more transparent and open, in addition to supporting walls, columns, no walls and windows. The two planes of the upper and lower sides of the flower stand (flooring and hoeing) do not have to be symmetrical and similar. They can be freely stretched and staggered, and each other is extended, so that the flower stand is placed inside the garden and blends in nature without being blocked. Third, the garden flower stand considerations Since the garden flower stand is to create conditions for plant growth, the choice of the position of the garden flower stand is very important. According to the biological characteristics of the plant, determine the orientation, volume, position and area of the flower garden, and make the plants get good lighting and ventilation conditions as much as possible. The garden flower stand in the courtyard must have its own characteristics. First, it must have a suitable size. The height of the small yard flower stand should not be less than 2 meters, and should not be higher than 3 meters. The width of the gallery should be between 2 and 3 meters. . The small yard flower stand that makes people feel spectacular should also be based on the balance of the dexterity and the environment, or the branches, leaves, flowers and fruits of the climbing plants, or the depth of the gallery. The openness of the frame is reflected. The beauty of the small yard flower stand often shows the changes in the line, contour and space combination, as well as the selection of materials and colors. However, the concentrated expression of beauty should be based on the graceful posture of the plant and the specific atmosphere that reflects the tranquility or warmth of the environment. Therefore, the shape of the small yard flower stand does not have to be deliberately sought after, otherwise it will take the initiative to dilute the plant landscaping effect of the small yard flower stand. But it can be unique in one aspect of the line, outline or space combination, without losing it as a beautiful main view small yard flower stand. The above is how to do the garden flower stand? Detailed answers to the notes on the garden flower stand, I don't know if you are satisfied with the introduction of the decoration home network. If you want to know more about the exciting content, please continue to pay attention to our home encyclopedia! More related wonderful reading: Indoor balcony flower stand purchase method, indoor balcony flower stand placement skills What kind of flowers are placed on the wall? Where is the flower stand on the living room wall? Living room decorative flower stand price living room decoration flower stand matching skills Homemade balcony flower stand steps homemade balcony flower stand material What are the shopping tips for home flower stands? Household flower stand material selection

Plants that grow in water are called aquatic plants, and aquatic plants have many similar characteristics. Their leaves are soft and transparent, and some are still silky, which can increase the contact area with water, so as to maximize the light and absorb carbon dioxide for photosynthesis. The following wood industry network Xiaobian introduces the characteristics of indoor aquatic plants and aquatic plants, as well as the picture of aquatic plants. What are the indoor aquatic plants? Ten indoor aquatic plants: rich bamboo, green sage, ivy, wenzhu, hyacinth, cinnabar, millennium wood, Brazilian wood, gerbera. Characteristics of aquatic plants In general, the intercellular gaps of aquatic plants are generally developed, and special ventilating tissues are usually developed to ensure that there is sufficient oxygen in the underwater part of the plant. The aerated tissue of aquatic plants is generally divided into two types: open type and sheltered from the wind. Open type generally means that air enters the ventilating tissue passing through the stem and leaves from the stomata of the blade, and then enters the stalk and root chamber of the ground. The closed type is to store the oxygen produced by photosynthesis for the purpose of breathing, and then use the action of breathing to produce carbon dioxide for photosynthetic use. The leaf area of aquatic plants generally increases, and its epidermis develops weakly or in some cases with almost no epidermis. There is no stomata on the surface of a part of the blade in the water, but the stomata on the surface of the leaf above the water surface often increase. In fact, the characteristics of the leaves of aquatic plants are to better adapt to the low light distribution of water species. And the results of environmental conditions of hypoxia. Generally, its leaves are divided into two types. The main task on the water surface is responsible for normal photosynthesis, while the underwater one is mainly responsible for absorbing inorganic salts. Because of the long-term adaptation to the environment in the water, the mechanical organization in the still water or in the stalks of the slow water has almost completely disappeared. After long-term evolution of aquatic plants, their root development has become very weak, and in some cases there will be almost no roots, mainly because the leaves in the water replace the function of root absorption. 4. Aquatic plants are mainly based on vegetative reproduction. Even if some plants do not breed vegetatively, they will rely on water for pollination.

First, organic agriculture. Organic agriculture is an agricultural production method that does not use genetically engineered organisms and their products in production, and does not use chemically synthesized pesticides, fertilizers, growth regulators, feed additives, etc., in accordance with certain organic agricultural production standards. Follow the laws of nature and ecology, coordinate the balance between farming and aquaculture, and adopt a series of sustainable agricultural techniques to maintain an agricultural production system that is consistent with a stable agricultural production system. Compared with traditional agriculture, organic agriculture has the following characteristics: First, it can provide the society with pollution-free, good taste, safe and environmentally friendly food, which is beneficial to the health of the people and reduces the occurrence of diseases. Second, it can reduce environmental pollution and help restore ecological balance. Third, it is beneficial to improve the competitiveness of China's agricultural products in the international arena and increase foreign exchange earnings. Fourth, it is conducive to increasing rural employment, farmers' income, and raising agricultural production levels. Second, ecological agriculture. Ecological agriculture is an agricultural production system. It refers to the principles of ecological and economic economics, the use of systems engineering methods and modern science and technology, and the establishment of the principles of ecological economic systems, under the premise of protecting and improving the agricultural ecological environment. A comprehensive agricultural production system that combines resources, environment, efficiency and efficiency. The characteristics of eco-agriculture: First, ecological agriculture emphasizes the overall function of the agro-ecosystem, taking the big agriculture as the starting point, comprehensively planning, adjusting and optimizing the agricultural structure according to the principle of [integration, coordination, recycling and regeneration" to make agriculture and forestry Comprehensive development of the first, second and third industries in the pastoral, deputy, and fisheries industries, and mutual support among industries, complement each other and improve comprehensive production capacity. Second, ecological agriculture is aimed at China's vast territory, with different natural conditions, resource bases, and economic and social development levels. It fully absorbs the essence of traditional Chinese agriculture, combines modern science and technology with multiple ecological models, ecological engineering and rich and colorful. The technical type is equipped with agricultural production, so that all regions can develop their strengths and avoid weaknesses, give full play to regional advantages, and each industry will coordinate with local realities according to social needs. Third, ecological agriculture realizes economic value-added through material recycling and energy multi-level comprehensive utilization and serialized deep processing, implements waste resource utilization, reduces agricultural costs, improves efficiency, creates agricultural internal employment opportunities for rural surplus labor, and protects farmers from engaging in The enthusiasm of agriculture. Fourth, the development of ecological agriculture can protect and improve the ecological environment, prevent pollution, maintain ecological balance, improve the safety of agricultural products, change the conventional development of agriculture and rural economy into sustainable development, and closely integrate environmental construction with economic development. The land meets the growing demand for agricultural products, improves the stability and sustainability of the ecosystem, and enhances the stamina of agricultural development. Third, green agriculture. Green agriculture is a kind of agricultural production and management, and it is a new type of agriculture. It refers to the agricultural production and management mode with the production, processing and sales of green food as the axis. Green agriculture is a broad-based [big agriculture", which includes: green animal and plant agriculture, white agriculture, blue agriculture, black agriculture, mushroom agriculture, facility agriculture, horticultural agriculture, sightseeing agriculture, environmental agriculture, and information agriculture. In specific applications, we generally refer to [three products", namely pollution-free agricultural products, green foods and organic foods, collectively referred to as green agriculture. Green agriculture is not a return to traditional agriculture, nor is it a denial of various types of agriculture such as ecological agriculture, organic agriculture, and natural agriculture. It is a new type of agriculture that avoids all kinds of agricultural problems, complements each other, and has rich connotations. In summary, ecological agriculture is aimed at agricultural production systems; organic agriculture is aimed at agricultural production methods; green agriculture is aimed at agricultural production and management methods. The three are "complementary and inseparable."

Many people like to put some decorative potted plants at home, but the potted plants can't be placed at will, otherwise there is no beauty. So some flower stands with potted plants appeared, and with these flower stands, the interior potted plants can be made more harmonious. But many people don't know where the flower stand is! Today, Xiaobian will come up with everyone to see if you can see the flower stand and the flower stand placement skills! Can you see the flower stand as soon as you enter the door? In Feng Shui, there are three to see and three to enter. (1) Seeing the door three times First see, see the calligraphy and painting. If you can see a good calligraphy or picture when you enter the door, it will show that the occupants have more cultural grades. The first scenery at the entrance is also called the entrance, and the feng shui knows that people are very concerned. Many families have the habit of painting or placing screens on the walls at the entrance. Therefore, open the door to see Geely calligraphy and painting, and enter the door porch Feng Shui painting preferred Geely auspicious Chinese painting flower and bird painting. The second sight, see the festive celebration. That is, when you enter the door, you will see auspicious decorations and handicrafts, which will give people joy and excitement, and they will feel more comfortable. In addition, when decorating, be sure to pay attention to the position you see when you enter the door. Third, see the green at the door. That is, seeing green plants as soon as you enter the door will give people a fresh and fresh nature, which will make the whole family have good luck. Flower stand placement technique First, how to put the flower stand together Modern families use soft partitions in the living room and dining room, or in the entrance, but although the soft partitions such as glass and bead curtains increase the permeability of the room, they are inevitably monotonous. Therefore, there is a flower best placed to point. As shown in the porch partition decoration effect picture, because the black partition is a bit awkward in the room, it is very different with two white flower stands. Second, how to put the flower stand together - corner Whether it is the corner of the entrance, or the other corners of the living room, you can place a retro-styled wrought-iron frame decoration like the one in the picture. The living room in the picture above is a simple decoration, so in the shade of wood and white, the black and simple slender flower stand looks very artistic, and the red tulip is more beautiful. Imagine how monotonous it would be if there was no such flower stand in this corner. Therefore, friends who think that the simple interior design is not beautiful can also improve their home. Third, how to put the flower stand together - under the photo wall There are two potted plants randomly placed on the white flower stand. There is no special place for the flower pot. Even if it is a plant, there is no special advantage. Even the green plant on the right side is a bit ugly. But on the white wrought iron flower stand, is it instant and elegant? This may be the reason why many women love the flower stand, it can always turn into a magic. Therefore, if the wall under the photo wall design has white space, it is definitely the best choice to put a flower stand. The arrangement of the flower stand is not too much attention. As long as the style is adapted, there is no obstacle to the daily life of the occupants, so you may wish to try it when you have time. The above is a small editor today introduced for everyone to see the flower stand and the flower stand placement skills to end here, want to know more information, please continue to pay attention to the decoration home.

First, color selection is generally recommended in the mountains with yellow anti-bird nets, plain with blue and orange red anti-bird nets, the above-colored birds can not close, not only can prevent birds from eating fruit, but also can make the birds do not hit the Internet, Anti bird effect is obvious. It is advisable not to use transparent screens in production. Such nets do not have a repellent effect and birds can easily hit the Internet. Second, the selection of meshes and nets depends on the size of the local bird. For example, small individual birds such as sparrows can be used to prevent bird nets such as magpies and spotted magpies. Optional 4.5 cm mesh bird net. Bird nets generally have a wire diameter of 0.25 mm. According to the size of the actual orchard, the net chief will purchase 100-150 meters of products on the market and 25 meters in width to cover the whole orchard. Third, the bracket height and density selection Fruit tree anti-bird net installation, we must first lay the stent, the stent can be purchased finished stent, can also be used galvanized pipe, triangle iron and other welding system, buried underground part should be welded on the cross, resistance to lodging. Iron rings are welded on the top of each bracket, and the brackets are connected by wire. After the scaffold is laid, it should be firm and durable, and its height should be about 1.5 meters higher than that of the fruit tree to facilitate ventilation. The stent density generally has a length of 5 meters and a width of 5 meters. Stand density depends on plant spacing and size of the orchard to increase or decrease. The denser effect is better, but the more dense the higher the cost. The width can be purchased in accordance with the width of the anti bird net, saving materials. Fourth, skynet and side net erection fruit tree anti-bird net to three-dimensional erection. The net in the upper part of the canopy is called Skynet. Skynet wears a good wire on the top of the support. Pay attention to the closeness of the junction and leave no gaps. The outer side of the tree canopy is called the side net. The junction between the side nets must be tight and the length must reach the ground without leaving gaps. Skynet and side nets are closely connected to prevent birds from harming into orchards. Fifth, the installation time to determine the fruit tree anti-bird nets only to prevent birds from harming fruit fruits, generally 7 to 10 days before the fruit matures birds began to feed damage when the fruit tree anti-bird net installation, the fruit can be taken after the full harvest Save it to prevent exposure to aging in the field and affect its service life. VI. Maintenance and preservation of fruit tree anti-bird nets The anti-bird nets of fruit trees are inspected at any time after installation and found to be damaged and repaired in time. After the fruit is harvested, the fruit tree anti-bird nets are carefully removed from the coils, packaged in a cool, dry place, and reused in the next year when the fruit matures. Generally, it can be used for 3 to 5 years.