In March and April, fruit trees should not miss the "spring shooter." Using biogas slurry as the "spring shooter" and "summer shooter" topdressing fruit trees can increase fruit set rate by 5%, increase production by about 20%, enhance quality, and increase sweetness by 0.5 to 1%.
Principles of fertilization: Different fruit tree ages have different application rates, and biogases are generally used during the growth period.
Fertilization method: Saplings are planted with “Spring Shooting Fertilizer†(biogas slurry) from late February to early March, and “summer shooter†(biogas slurry) at the beginning of May. At the beginning of July, “Autumn shooter†(biogas slurry) is applied. ); Adult trees mainly in the flowering results before flowering fertilizer (biogas slurry), young fruit period strong fruit fertilizer (biogas slurry), drip line around the crown, open round or half moon-shaped groove, groove width 30 cm , 35 cm deep, such as 50 cm soil depth difference is appropriate, each plant with 100 ~ 150 kilograms of biogas residue, appropriate application of part of the phosphate fertilizer, soil cover slightly convex, to prevent accumulation of water. In the flowering and fruiting period, foliar spray fertilizer can also be used to supplement the nutrients. During the flowering period, 100 kilograms of clarified biogas slurry is mixed with 300 kilograms of water (1:2 to 3) and sprayed directly into the leaves (leaves back). 100 kilograms of clarified biogas to 100 kilograms of water (1:I), directly sprayed into the leaves and fruit surface, 2 or 3 times per month, the best choice of foliar spray fertilizer is in the late evening of the evening, the main spray leaves the back, spraying The amount of leaf covered with water without drip is appropriate.
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