黔中马尾松近熟林空间结构特征及其调控  

Spatial structure characteristics and regulation for the Pinus massoniana near-mature forest in the central Guizhou Province, China

作　　者：黄剑峰 谭伟[1] 柴宗政 蔡照军 HUANG Jianfeng;TAN Wei;CHAI Zongzheng;CAI Zhaojun(Forestry College,Guizhou University,Guiyang 550025,Guizhou,China;Forestry Enterprise of Pingba District,Anshun 561100,Guizhou,China)

机构地区：[1]贵州大学林学院,贵州贵阳550025 [2]安顺市平坝区林业局,贵州安顺561100

出　　处：《浙江农林大学学报》2019年第4期749-756,共8页Journal of Zhejiang A&F University

基　　金：贵州省科技支撑计划项目(黔科合支撑〔2017〕2520-1号);国家林业局资助项目(林资发〔2011〕248号);贵州省林业厅资助项目(黔林资复〔2012〕331号)

摘　　要：林分空间结构是描述林分结构极其变化的重要指标,是森林经营与管理成功的标志。利用随机抽样方法在黔中马尾松Pinus massoniana可持续经营管理试点(安顺市平坝区)设置100m×100m马尾松近熟林固定样地,采用10m×10m网格调查每株林木的树高、胸径和坐标数据,主要以混交度、大小比数和角尺度的一元和二元分布研究马尾松林的空间结构特征。结果表明:①该林分中马尾松在株数和断面积比例上占明显优势,种内竞争对马尾松生长影响很大,整个林分以零度混交为主,空间异质性不高;②在整个林分中,大部分林木处于随机分布,胸径差异不显著,伴生树种主要空间分布格局为集聚分布;③模拟采伐有利于林分空间结构的调控,改善林分空间分布格局,为森林群落的正向演替以及优势种群的健康生长提供了有利空间条件。Spatial structure is important in describing forest stand structure and change, which is an indicator to the success of forest management. A 100 m × 100 m permanent sample plot of the Pinus massoniana near-mature forest was established in Central Guizhou with random sampling method, the tree height, diameter at breast height, and coordinates of each tree were determined as the base data based on a 10 m × 10 m grid. The characteristics of forest spatial structure were analyzed by univariate and bivariate distributions of mingling, dominance, and uniform angle index. Results showed that (1) P. massoniana was dominant in number and basal area, the intraspecific competition among P. massoniana trees greatly affected the growth of trees. The whole stand was dominated by a zero-mixed degree with low spatial heterogeneity.(2) For the whole forest stand, most of the distributions were random, there was no significant difference in the tree diameter, and the main spatial distribution pattern of associated tree species was a concentrated distribution.(3) Simulated cuttings contributed to the regulation of spatial structure, which improved the spatial distribution pattern and provided the favorable spatial conditions for positive succession of the forest community as well as healthy growth of the dominant tree populations.

关 键 词：森林测计学 马尾松 近熟林 空间结构特征 调控 

分 类 号：S758.5[农业科学—森林经理学]