A 10 m3 biogas digester, the biogas fertilizer (32 m3) provided for one year is equivalent to 50 kg of ferric sulfate, 40 kg of superphosphate and 15 kg of potassium chloride. The application of biogas fertilizer can increase fruit tree production by 5% to 20%. The following brief introduction to the application of biogas fertilizer on fruit trees to the majority of farmers:
1. Roots. Biogas slurry can be flooded under the tree tray or deep-irrigated in the trenches, and can be flooded once before the apple tree sprouts, young fruit, flower bud differentiation, and fruit harvest. Saplings per plant irrigation 15 to 25 kg, the initial fruit trees flooded per plant 30 to 50 kg, full fruit tree every flood irrigation 60 to 90 kg. Digging and ditching are conducted separately before and after harvesting. A ditch with a width of 20 to 30 centimeters, a depth of 15 to 20 centimeters, and a length of 80 to 120 centimeters is dug in the outer periphery of the canopy in four different directions. Liquid into the soil, backfill and compaction. Biogas slag is generally applied after the fruit is harvested and before the germination. The method is to dig trenches along the outer circumference of the canopy or dig out 2 to 4 radiation channels from the base of the trunk. The width of the ditch is 30-40 cm and the depth is 30-. 50 centimeters and 80 to 120 centimeters long, compacted with soil after application. Saplings apply biogas residues of 5 to 10 kilograms. The initial fruit trees are applied at 10 to 25 kilograms, and the fruit trees at the fruit stage are applied at 30 to 40 kilograms.
2. Spray. In the spring shoot growth period (early May), young fruit period (early June), flower bud differentiation period (early July), and the second fruit enlargement period (early August), a biogas slurry is preferably sprayed. Highly atomizing nozzles. Spraying should be uniform and detailed. Pay attention to the positive and negative sides of the blade, and spray the amount of leaf slurry to drip. Spraying the original solution has the best effect, but the concentration of biogas slurry should be reduced appropriately during the high temperature season (July to August). Spraying 3 to 5 times of liquid is appropriate.
3. Apply dry. The buds, 10 days after flowering, the first fruit enlargement period, flower bud differentiation period (early July) and the second fruit enlargement period (early August) were coated with the original liquid once.
4. Insect protection. In July, when apple tree spider mites, locusts and other pests are paralyzed, they will be filtered for 2 to 3 hours of biogas slurry and added with pesticides such as A imidacloprid, anti-viper, and konjac and spray directly on apple trees. , Once a week, spray twice, best for pest control.
Note: The biogas slurry sprayed on the surface must be the biogas slurry from the normal digester discharge for more than 3 months. It can be used after clarification and filtration for 2 to 3 days. Foliar spraying should be done on a sunny or cloudy day with no wind, and it should not be applied on a sunny day.
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