生态学杂志2018，Vol.37Issue(3)：847-853,7.DOI:10.13292/j.1000-4890.201803.016
胸径和林分密度决定内蒙古东部落叶松林种内竞争
DBH and stand density regulate intraspecific competition of Larix gmelinii in eastern Inner Mongolia
摘要
Abstract
Competition is one of the main drivers for forest decline and restoration.In this study,we investigated 293 target trees in a Larix gmelinii plantation in a semi-arid area of eastern Inner Mongolia.We used Heygi individual competition index model to quantify the competition intensity at both individual and plot levels and analyzed the determinant factors.Results showed that the competition intensity of L.gmelinii decreased with the increases of diameter at breast height (DBH).Their relationship followed the power function.Results from Pearson's correlation analysis indicated that individual competition index was negatively correlated with tree height and crown width,and positively correlated with tree decline index.A multiple linear regression model analysis demonstrated that the competition intensity at the plot level was mainly influenced by stand density.Our results had implications for uncovering the mechanism for the forest decline in eastern Inner Mongolia.关键词
内蒙古东段/落叶松/种内竞争/个体水平/样地水平Key words
eastern Inner Mongolia/Larix gmelinii/intraspecies competition/individual level/plot level引用本文复制引用
刘怡青,田育红,宋含章,黄薇霖..胸径和林分密度决定内蒙古东部落叶松林种内竞争[J].生态学杂志,2018,37(3):847-853,7.基金项目
国家自然科学基金重点项目(41530747)资助. （41530747）
