树木间也像动物界一样存在着“相克”和“相生”现象。我们应掌握其特性，扬长避短。1“相克”柏树是苹果、梨树的“冤家对头”。苹果、梨锈病病菌的中间寄主是柏树，上述病菌的冬孢子阶段是在柏树上度过的。苹果、梨园周围不宜栽柏树。核桃树跟苹果树“势不两立”。核桃叶经常 There is also the phenomenon of “phase g” and “phase growing” between trees in the same way as the animal kingdom. We should grasp its characteristics, avoid weaknesses. 1 “g” Cypress is an apple, pear’s “enemies of the enemy.” Apple, pears rust intermediate host is cypress, the winter’s spore stage of the bacteria is spent on cypress. Apples, pear orchard should not be planted around cypress. Walnut trees and apple trees “irreconcilable.” Walnut leaves often