【摘要】 阐述了林分生长及水土保持功能的差异,将林分划定为三种类型,即油松人工用材林、油松人工水源涵养林、油松人工水土保持林。在10,20,33年生时的不同林龄阶段,对三种林分类型适时进行密度调整,以发挥更大的生态、经济、社会效益。更多还原

【Abstract】 Different pine artificial forest differ in growth,and soil and water conservation function.Standing forest was classified into three types:artificial timber forest,artificical water conservation and timber forest,artificial soil and water conservation forest.When three types of artificial forest are 10,20,33 years old,in order to make these forests produce more ecological,economical and social social benefit,planting density of trees was adjusted.更多还原