秦岭西段锐齿栎林分经营状态评价  

Evaluation of Quercus aliena var.acuteserrata forest at the western segment of Qinling Mountain,northwestern China

作　　者：段昌盛 王军辉[2] 马建伟 袁士云 杜彦昌 

机构地区：[1]甘肃省小陇山林业实验局 [2]中国林业科学研究院林业研究所,国家林业局林木培育重点实验室 [3]甘肃省小陇山林业科学研究所

出　　处：《北京林业大学学报》2009年第5期61-66,共6页Journal of Beijing Forestry University

基　　金：国家林业局林木培育重点实验室基金项目“甘肃小陇山植被类型调查及多样性研究”;中央级公益性科研院所基本科研业务费专项资金项目“甘肃小陇山次生林主要林型结构特征”;国家林业局林业科技成果推广项目“天然林经营与恢复技术推广”

摘　　要：应用林分空间结构分析方法,对秦岭西段锐齿栎林分抚育间伐前后的经营状态进行评价,评价参数包括重要值、角尺度、混交度、大小比数、优势度和开敞度等。结果表明:干扰前后林木的分布格局由轻微团状分布变为随机分布;锐齿栎林平均混交度略有上升,但顶级树种锐齿栎的混交度呈明显上升趋势;锐齿栎林胸径大小比数变化不大,保持了顶级树种在群落中的优势地位;开敞度则由于抚育间伐后林木间距的增大而得以提高,达到了优化目的,创建最佳的符合秦岭西段天然次生林特点的森林空间结构。The variations of spatial structure parameters, including important value, angle index, mingling, neighborhood comparison, domination and opening degree, were analyzed for the Quercus aliena var. acuteserrata forest before and after intermediate cutting at the western segment of Qinling Mountain, northwestern China. The results showed that the distribution pattern was transformed from little cluster to random after intermediate cutting. The average of mingling showed a tendency of increasing and the range was not big in stands, while it increased obviously for the climax tree species Q. aliena vat. acuteserrata. The neighborhood comparison showed a little difference and the climax species maintained dominant in community. The opening degree increased with the increase of the distance among trees after intermediate cutting. So the stand spatial structure was built and optimized at the western segment of Qinling Mountain.

关 键 词：秦岭西段 锐齿栎 天然林 林分空间结构 抚育间伐 

分 类 号：S718.5[农业科学—林学]