1, technical points The biogas digester (biogas project) is not only a gas production facility but also a “workshop†for fertilizer production. The promotion of the application of fruits, vegetables, and tea biogas fertilizers as alternatives to chemical fertilizer technology can not only avoid the “secondary pollution†caused by the disposal of biogas slurry and biogas residue, but also reduce the input of chemical fertilizers, improve the quality of economic crop products, and increase the income of farmers. (1) Basic requirements. The biogas digester (biogas project) should be balanced with the orchard/vegetable garden/tea plantation, farm and planting crops when selecting the site, so that it is convenient for feeding and discharging and considering the convenience of applying biogas fertilizer, which is conducive to maintaining cleanliness and hygiene. (2) Orchards. The biogas residue directly taken from the bottom of the biogas digester (biogas project fermenter) has a solid content of 10% to 15%. It is usually applied as a base fertilizer when a large amount of fertilizer is used in spring and autumn. The application rate per mu is l000 ~ 2000kg. The application method is very simple. The biogas residue is applied to fruit tree foundation pits. Before and after each growth period of fruit trees, biogas slurry can be sprayed. It is better to use pure biogas slurry for general application, but depending on the climate and tree vigor, it can be diluted or mixed with pesticides and chemical fertilizers. For fruit trees with poor fruit tree growth, long tree age, and fruit set-up, pure biogas slurry should be sprayed to provide nutrients that fruit trees need urgently. If the temperature is high, it is not appropriate to use pure biogas slurry, but add appropriate amount of water to spray after dilution. (3) Vegetable Garden. When biogas residue is used as base fertilizer, biogas residue is used for 1500-3000 kg/mu, which is thrown in when plowing, and it can also be applied before or after transplanting. When biogas slurry is topdressing, it can be sprayed and sprayed with vegetable leaves in the morning or evening. For foliar dressing, the biogas slurry should be clarified and sprayed after filtration, but be careful not to chase and spray in the strong sunlight or at noon in the summer to avoid burning the vegetables. The technical point of the soilless cultivation vegetable garden: The biogas fermentation broth after sedimentation and filtration passes through the liquid supply pipe and flows into the cultivation tank automatically and then enters the liquid storage tank. The micro-pump connected by the water level controller recovers the biogas fermentation liquid in the liquid storage tank. The liquid pool is used to complete the circulation of the nutrient solution, which is repeated in turn. According to the different quality of the vegetables or the need for trace elements, trace elements can be properly added and the pH is adjusted to 5.5 to 6.0. During the cultivation of vegetables, biogas fermentation broths should be replaced regularly. (4) Tea gardens. Generally choose to stop the growth in the tea tree ground immediately after the application of biogas residue as a base fertilizer, should not be too late, after basal fertilizer combined with deep plowing tea garden, is conducive to the normal development of overwintering buds, in order to lay a good foundation for the early spring prolific high-quality fresh leaves; tea garden Top dressing is applied more than 3 times; top dressing is done outside the roots. Usually 3-4 times a year. When the tea shoots germinated with 1 or 2 leaves, biogas slurry was sprayed. Each time after picking, the tea is sprayed one time, and the proportion of biogas slurry and clean water is 1:1, and 100 kg of biogas slurry is applied. Spraying time should be in the evening, early morning or cloudy days, and no foliar fertilizer can be sprayed in the afternoon. Special attention should be paid to spraying on the back of the leaves, because the absorptive capacity of the leaf's back is more than 5 times higher than that of the back. 2, increase production efficiency goals The province promoted the use of fruits, vegetables, and tea biogas fertilizers to replace 5 million mu of fertilizer technology. The promotion of this technology can utilize the waste of livestock and poultry manure, reduce waste emissions, and achieve cleaner production. The application of biogas residue biogas slurry to orchards, vegetable gardens, and tea gardens can replace or reduce fertilizer input, improve soil properties, and improve product quality of economic crops. Each can increase the income by 15-20%. Grain powder is a kind of solid powder obtained by spray drying after breaking the wall of grain with high protein content. 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