在树行间种小麦、烟草等,犁伤耱压,便会使苹果树形成灌丛状树和小老树。这类果园往往产量很低甚至没有产量,其改造方法如下:一、改变施肥方法,调整树下套种作物在秋冬季节沿树冠挖沟,深80～100厘米,宽40～60厘米,施有机肥或杂草、秸秆。在施杂草秸杆时,每树加施尿素1.5千克。夏 Planting wheat, tobacco, etc. between tree branches, and plowing the furrows will cause the apple trees to form scrub-like trees and small trees. Such orchards often yield very low or no yield, the transformation method is as follows: First, change the method of fertilization, adjust the crop under crops in the autumn and winter trenches along the crown, 80 to 100 cm deep, 40 to 60 cm wide, organic fertilizer Or weeds, straw. 1.5 kg of urea was applied to each tree while weed straw. summer