To solve the problem in poplar planting, in aid of agriclutural research achievement, system research were carried out in forest cultivation including key techniques of water and fertilizer regulating, root regulating, plastic mulch, organic fertilizer et al. The study tried to explore the regular of plplar growth, improve the forest fertility and increase the poplar yield. The results were as fellows:
1. Water and fertilizer interactive: Under the same water level, the content of chlorolhyll and root a...