Biogas fertilizer is a quick-acting nitrogen fertilizer. The amount of nitrogen contained in it is related to the type of raw materials used, the proportion of ingredients, and the amount of water added. The application proves that the biogas fertilizer not only has good effect on the fertility and yield increase of food crops, but also can increase the fruit setting rate by more than 5%, increase the yield by 10% to 30%, increase the sugar content and enhance the quality of the fruits, and reduce the pests and diseases. Reducing production costs is an excellent fertilizer for the production of pollution-free fruit and green food. The method of application on the fruit is:
First, before use as a basal fertilizer, 30% of straw or weeds should be added to the biogas residue, 2% of superphosphate, 1% of potassium sulfate, 10% of mature soil, blended and evenly piled, and a layer of paste Thin and thin soil, stacking 1.5 to 2.0 months, root distribution area within 50 cm of canopy drip, dig deep and wide 50 cm of the full ring groove, half ring groove or 1/4 ring groove, small tree per plant Fertilizer 8 ~ 15 kg, each tree with 50 to 60 kilograms applied into the ditch, and then mixed with the amount of fertilizer in the topsoil and fertilizer, mix well, smooth, and then fill with soil to restore the level. The period of fertilization is appropriate from September to October.
Second, it is used as topdressing in combination with irrigation every year from May to May, and a shallow ditch with a depth of 20 cm, a width of 30 cm and a length of 60 cm is applied in the root distribution area. Small trees apply 5-6 kg of biogas slurry per plant, and each tree of plants applies 10-12 kg. Immediately after application, it is irrigated to spread the water to the root distribution layer; if it is not filled with water, it should be diluted 3 to 4 times with fresh water and stirred. Apply in order to avoid over-concentration of fertilizer and cause burning of roots. Generally applied once a month.
Third, as a foliar spraying fertilizer in the fruit tree leaves turn green to the growth period before the defoliation, filter screen to remove the residue in the biogas slurry, the early branches and leaves tender, add fresh water 2 times, in the middle and late branches and leaves after adding fresh water 1 times, spraying leaves and fruits. When sprayed, 0.1% urea was added in the early stage and 0.2% phosphorus and potassium fertilizer was added in the middle and later stages. And spray back as much as possible so that the pores absorb.
Fourth, for the prevention and control of pests because of biogas slurry on the rust, mildew and aphids, spider mites and other pests have a better control effect, in the occurrence period, with the filtered residue filtered water 1 to 2 times Timely injection (parking time cannot exceed two hours), can receive the expected results. If 0.2% of enzyme-free detergent is added to the filtrate and sprayed after stirring, the locust and red spider can be reduced by half in two days. (Zhang Xingwang)
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