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樱桃和苹果相生,若种在一起,各自都可放出一种挥发性气体,彼此互相吸收,促进生长发育,结出的果实格外香甜。刺槐和杨树是“好友”,刺槐是浅根性树种,杨树是深根性树种,互不争水肥,且刺槐的根瘤菌可固氮供给杨树,促进其生长。大豆、花生地内若种玉米,则大豆、花生的根瘤菌可固氮供给玉米,而玉米则可反哺碳水化合物给大豆、花生。黄瓜和豆角若种
Cherry and apple, if together, each can release a volatile gas, mutual absorption, promote growth and development, the fruit is extremely sweet. Robinia pseudoacacia and poplar are “friends”. Robinia pseudoacacia is a shallow-rooted tree species. Poplar is a deep-rooted tree species that competes with each other for fertilization. Rhodosporidia of Robinia pseudoacacia can supply poplar with nitrogen and promote its growth. Soybean, peanut, if the kind of corn, soybean, peanut rhizobium nitrogen can supply corn, while corn can feed back to carbohydrates to soybeans, peanuts. If cucumber and beans