摘要
竞争是影响树木生长的重要因素。树木间竞争包括地上和地下部分。本研究将树木间竞争影响范围分为两部分 :相邻树木存在树冠和根系接触部分称为内圈 ,树木间竞争影响包括地上和地下部分 ;内圈以外称为外圈 ,树木间竞争主要来自地下。同时依据竞争木树种划分竞争指数分量 ,由此构建竞争指数模型。以年材积生长量为因变量各竞争指数分量为自变量 ,通过多元回归分析建立了木麻黄湿地松混交林中树木个体生长的竞争效应模型 ,模型拟合效果好 ,回归结果与林分实际相符 ,从而为木麻黄湿地松混交林理论研究和合理经营提供科学依据。
Competition is a vital factor to affect tree growth. Competition among trees includes aboveground and underground parts. The zone which influence the competition among trees were divided into two parts: one part was defined as inside radius in which the near trees contact by crowns and roots and the competition effect among them includes aboveground and underground parts, another part was defined as outside lane where the competition among trees came from underground. At the same time the competition index ...
出处
《林业科学》
EI
CAS
CSCD
北大核心
2003年第S1期42-46,共5页
Scientia Silvae Sinicae
基金
"十五"攻关项目"中国森林生态网络体系建设福建省东山试验点研究"部分内容
关键词
竞争指数
竞争效应模型
木麻黄
湿地松
纯林
混交林
Competition index
Competition effective model
Casuarina equisetifolia
Pinus elliottii
Pure stand
Mixed stand
