“The benefits of biogas fertilizer are many and the whole body is a treasure!†Longchi Town farmers told the author. Biogas fertilizer is a general term for biogas slurry and biogas residue. It is a product of anaerobic fermentation of biomass through biogas digesters and is a high-quality organic fertilizer. At present, Longchi Town has built 2,500 biogas digesters, which can provide 50,000 tons of organic fertilizer. In order to give full play to the effectiveness of biogas fertilizer, Xiushan County Bureau of Agriculture combined with the current education campaign to maintain the advanced nature of party members, based on the strategy of grain production by science and technology, increased technical propaganda and training, and went deep into villages and groups to explain to farmers how to use biogas soaking, The technical points of biogas slurry residue dry soil breeding, biogas fertilizer application and biogas slurry control pests and diseases, not only reduce production costs, increase economic income, but also promote the development of pollution-free agricultural products, improve crop yield and quality. First, biogas slurry soaking technology: 1, Shaizhong: use good seed, remove impurities, turn over the sun 1 - 2 days. 2. Bagging: Select a woven bag or cloth bag and load the seeds to leave 1/4 of the space. 3. Clean slag: Select the biogas slurry between the discharge of biogas digesters that normally produce gas for more than 1 month. Remove scum and impurities before soaking, and do not mix raw materials. 4. Soaking: One end of the rope is tied to the bag mouth and the other end is fixed at the edge of the pool so that the seed is in the middle of the biogas slurry. The seed soaking time is suitable for the soaking time; the hybrid rice adopts batch type, soaking for 12 hours, and drying for 6 hours. Soak for 12 hours, dry for 6 hours, soak time for no less than 36 hours; corn: soak for 12–16 hours. Clean the seeds in time and cap the biogas tanks, pay attention to safety. 5. Cleaning: After the soaking of the biogas slurry is completed, clean water should be applied to the net, then dry, germinate, heat the nursery or sow. Second, the biogas digester dry soil breeding technology: (A) of the biogas digester dry soil technology is a new technology for the cultivation of high quality rice seedlings. 1. Seedbed production: According to Honda's 1:60 standard selection, before soil preparation, 2kg of biogas fertilizer is spread into the seedbed per square meter, and cultivated 2-3 times. Immediately afterwards, the width is 140cm, the height is 15cm, and the length is 15cm. Not more than 10m, flattened the surface, and made the waist and ditch. 2. Seeding preparation: Prepare 80kg agricultural film and 450 bamboo pieces per acre seedbed, and sow 1.5kg per acre. 3. Appropriate sowing date: The average daily temperature can be stabilized at 10°C. When planting, use a board to gently press the surface, and use a watering pot to sprinkle water evenly to the 5cm soil layer. According to the 2-3kg/m2 standard, the biogas slurry is sprayed, and then the seeds are spread evenly back and forth, successively encrypted, and then evenly scattered on the seeds with spare dry fine soil, so that the seeds are not exposed, and then gently pressed with a wooden board, with The sprayer sprays water to keep the topsoil wet. Insert bamboo cover film. 4. Management of seedbed: Keep the soil moist during rooting and seedling stage, and dilute the biogas slurry twice a week before the nursery to send the fertilizer. (2) Production of biogas residue corn nutrient soil: Mixing the decomposed biogas residue and fine clay in a ratio of 6:4 to produce the biogas residue corn nutrient soil fertilizer ball seedlings. After sowing, cover them with fine soil that is splashed with biogas slurry, and the seedlings grow 2 - Transplant when 3 true leaves are in use. Third, the application of biogas fertilizer technology: (A) the use of base fertilizer: paddy field plowing, the application of biogas fertilizer 2000kg per mu, after the three plough two rakes, flooding can be planted after 2 days. The dry land was selected to be planted before the rain or in the ditch, and 2000 kg of fertilizer was used for the mu. (2) Foliar spraying: 1. Biogas slurry: Biogas digesters collected from normal gas production for more than 1 month, and then clarified and gauze filtered. 2, fertilization time: dry morning after the dew, summer evening is appropriate, high temperature and no rain before no time. 3, application concentration: seedlings, young leaves 1 part of biogas slurry plus 1-2 parts of water; summer high temperature, 1 part of biogas slurry plus 1 part water; low temperature, when the old leaves do not add water. 4. Application method: The application amount of mu is 40-100kg, mainly spraying the back of leaves. Fourth, biogas slurry technology to prevent pests and diseases: Biogas slurry control pests and diseases without pollution, no residual toxicity, no resistance, known as biological pesticides, 13 kinds of crops, 37 kinds of diseases and pest control. 1, control corn borer: take biogas slurry take 50kg, add 2.5% emulsifiable EC 10ml, stir well, irrigation corn heart leaves. 2, control of rice borers: Take 1 slurry of biogas slurry and add 1 part of water to mix and pour.