树木之间存在着复杂的相克和相生关系,有的结邻能相互促进生长,是“好友亲朋”,有的结邻则互为抑制,是冤家对头。种植果树也是如此。在实践中发现:果园附近不能种核桃树、槐树,因核桃树的根和皮层内含有的核桃醌能使许多果树茎杆细胞分离。而洋槐树是椿象的“蔽护所”和“策源 There are complex relations between trees and the relationship between the trees, and some neighbors can promote each other growth is “friends and relatives,” and some neighbors are mutually inhibited, is the enemy of the enemy. The same is true of growing fruit trees. In practice, it is found that walnut trees and locust trees can not be planted near orchards, and many fruit tree stem cells can be separated due to the walnut quinone contained in the roots and cortex of walnut trees. The acacia tree is a stink bug’s “shelter” and "policy source