湖北省国营竹山县九华山林场,创建于1955年,1987年开始经营采伐,目前全场已营造杉木二代林(以下简称二代林)9个小班、1420亩,但普遍生长不良。为了探讨二代林栽培技术,解决二代林生长衰退的问题,1989年以来,我们采取调查现有幼林生长状况与开展试验研究相结合,总体试验与分项试验相结合的方法,进行了比较全面的研究。先后抽样 Jiuhua Mountain Forest Farm in Zhushan County, Hubei Province, was founded in 1955 and began operations in 1987. At present, there are 9 small classes and 2,142 acres of second-generation Chinese fir forest (hereinafter referred to as “Second Generation Forest”). However, the general growth is poor. In order to explore the second generation of forest cultivation techniques to solve the problem of the second generation of forest growth recession, since 1989, we have taken the survey of existing young forest growth and experimental research combined with the overall test and sub-test methods were compared Comprehensive study. Has sampled