Using biogas slurry as the “summer shooter†fertilizer for fruit trees can increase fruit set rate by 5%, increase production by about 20%, and can significantly enhance quality and increase sweetness by 0.5%-1%.
Fertilization method: Apply "summer shooter" (biogas slurry) in mid-May. In adult trees, flowering fertilizer (biogas slurry) is applied before the flowering results, and fruit fertilizer (biogas slurry) is applied during the young fruit period. In the drip line around the canopy, open a round or half-moon-shaped groove with a width of 30 cm and a depth of 35 cm. If the soil quality is poor, the depth should be 50 cm, and each plant should use 100-150 kg of biogas residue, which can be appropriately increased. Apply phosphate fertilizer, then cover the soil slightly convex to prevent accumulation of water. In the flowering and fruiting period, foliar spray fertilizer can also be used to supplement nutrients. During the flowering period, 100 kg of clarified biogas slurry is mixed with 300 kg of water (1:3), and the leaf surface is directly sprayed (leaves back). The fruit enlargement period is clarified with good clarification. Biogas slurry 100 kg watered 100 kg (1:1), directly sprayed leaves, fruit surface, 2-3 times per month. The foliar spraying fertilizer is best chosen in the evening of the sunny day, and the spraying amount is appropriate to cover the water droplets with no drip.
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