思茅松天然林胸径与树高结构的变化  

Changes of DBH and tree height structure of Pinus kesiya var. langbianensis natural forest

作　　者：欧光龙[1,2] 王俊峰[1] 胥辉[1] 肖义发[1] 字俊江 

机构地区：[1]西南林业大学西南地区生物多样性保育国家林业局重点实验室,云南昆明650224 [2]东北林业大学林学院,黑龙江哈尔滨150040

出　　处：《中南林业科技大学学报》2014年第1期37-41,共5页Journal of Central South University of Forestry & Technology

基　　金：云南省基金应用基础研究计划项目(2012FD027);国家自然科学基金项目(31160157)

摘　　要：以云南省思茅区思茅松天然林为研究对象,分析了思茅松天然林次生林的林分结构变化,采用Weibull函数拟合林分直径结构,采用幂函数模型拟合树高结构,并采用逐步回归分析拟合参数与环境因子的关系。结果表明:(1)胸径符合Weibull函数分布;其拟合参数a与样地内林木株数(N)和坡向(T ASP)相关,且均呈正相关;b与土壤水解性氮(C HN)、林木优势高(H ST)、林木平均高(H M)和林木株数(N)相关,且均呈负相关;c与林木平均高(H M)相关,且呈正相关。(2)树高符合幂函数分布,其拟合参数a与林分平均胸径(D M)、土壤有效磷(C YP)、土壤水解性氮(C HN)、样地内林木株数(N)呈负相关,与土壤有机质(O M)和总磷(T P)呈正相关;b与土壤pH值呈负相关,与土壤有效磷(C YP)和样地坡度(T SLO)呈正相关。Take Pinus kesiya var. langbianensis natural forest in Simao district Yunnan province as research object, the tree height and diameter structure had been analyzed. The diameter structure had been estimated by Weibull function and the tree height structure by power function. Then the estimated parameters had been analyzed by stepwise regression with the environment and stand factors. The results indicate that （1） tree diameter at breast height （DBH） structure conformed to Weibull function, its estimated parameters a was positively related with the number of trees （N） and slope direction; the parameters b was negatively related with hydrolytic nitrogen of soil （CHN）, the dominant height of stand （HsT） and the average height of stand （HM） and the number of trees （N）; the parameters c was positively related with average height of stand （HM）; （2） tree height structure conformed to the power function distribution, its estimated parameter a of power function was negatively related with average diameter at breast height （DM）, available phosphorus in soil（Cvp） and soil hydrolytic nitrogen （Cry）, and positively with the number of trees（N） in sample, and the organic matters in soil, total phosphorus （CTp）. While the parameter b of power function was negatively related with soil pH, and positively with soil available phosphorus （Cvp）, and the slope of plots.

关 键 词：思茅松 直径结构 树高结构 云南省思茅区 

分 类 号：S758.5[农业科学—森林经理学]