林业生产实践中,人们很早就发现植物彼此之间似乎存在着“爱”与“恨”,如:葡萄旁边栽榆树,葡萄根系枯萎,叶果脱落;葡萄园里种紫罗兰,葡萄丰产稳产,香味浓甜。以加杨为目的树种造林,将刺槐搭配,两者相得益彰;与榆树组合,生长同时受挫;以黄栌混交,加杨生机勃勃,黄栌长势萎靡。柳树枝条浸出液能促进许多植物扦插生根,苦楝枝叶浸出液可杀死一些林木害虫……。现代科学将这些现象解释为植物种间有着复杂的生物化学关系,为了揭示这些规律,近年诞生了一门边沿学科——化学生态学。 In the practice of forestry production, people seem to find that plants seem to have “love” and “hate” as early as possible. For example, elm trees are planted next to the grapes, the roots of the grapes are withered, the leaves fall off, the violets are planted in the vineyards, Sweet and sour To add Yang for the purpose of afforestation trees, the locust mix, the two complement each other; combination with the elm, growth frustrated at the same time; mixed with yellow pomfret, add Yang vibrant, Huang sluggish. Willow branches extract can promote cutting rooting many plants, branches and leaves of neem extract can kill some forest pests ... .... Modern science interprets these phenomena as having complex biochemical relationships among plant species. In order to reveal these laws, a marginal subject has emerged in recent years - chemical ecology.