摘要
沿海拔梯度设置56个样地,对小秦岭植物群落组成与结构进行调查分析。结果表明,(1)小秦岭群落物种丰富,样地中共调查到有143科330属522个类群;(2)通过对乔木,灌木,草本的重要值分析可知,华山松、连翘、莎草占优势;(3)对乔木层进行径级结构分析,葛萝槭和领春木呈倒"J"形,说明森林更新良好。华山松、秦岭冷杉等呈正态分布和多峰特征,说明面临着后代更新困难的局面,属于衰退种群;(4)对乔木层的植物进行树高和胸径的拟合作图,所建立的二元分布模型可以为研究树木胸径、树高的实际关系和动态提供信息。
56 sample plots along the altitudinal gradient were set to investigate and analyze the composition and structure of the Xiaoqinling plant community. The results showed that： （1） There are abundant community species in plots, belonging to 143 families, 330 genera and 522 taxa; （2） By analyzing the important value of trees, shrubs and herbaceous we find that Pinus armandi, Forsythia and Sedges are in the dominant position; （3） The analysis of the size structure of tree layer suggests the following results： Pizmaple and Euptelea present the reversed ＂J＂ shape, which showed good forest regeneration; On the contrary, Pinus armandi, Abies chensiensis and others showed normally distributed and multi-modal features, indicating that these future generations are facing a difficult update situation, belonging to the decline populations; （4） By building a bivariate distribution model based on the analysis of the fitting of tree height and DBH, we can provide information for the study of actual rela-tionship and dynamic between tree height and DBH.
出处
《河南农业大学学报》
CAS
CSCD
北大核心
2015年第3期335-342,共8页
Journal of Henan Agricultural University
基金
河南省科技攻关项目(132102110133)
河南省教育厅科学技术研究重点项目(14A180013)
关键词
海拔梯度
群落结构
径级结构
多度分布
拟合优度
elevatio gradient
community structure
size structure
abundance distribution
goodness of fit
