Position: Home > Articles > Variation of Crown Shyness with Stand Factors in Larix olgensis Plantation
Journal of Northeast Forestry University
2010,38
(7)
1-4
长白落叶松林冠空隙度随林木因子的变化
作 者：
巨文珍;王新杰;付尧;马炜;孙玉军
单 位：
省部共建森林培育与保护教育部重点实验室(北京林业大学)
关键词：
林冠空隙度;郁闭度;冠幅;冠长;树高;林分调查因子
摘 要：
为了确定控制人工长白落叶松林林冠空隙度(crown shyness)的林分调查因子,调查了林分郁闭度、冠幅、冠长、树高、胸径、形数、相对密度及疏密度等因子,分析了不同林分因子与树冠因子之间的关系,并采用树冠空隙形状复杂性指数(C)分析了调查区域的林冠格局。结果表明:该地区落叶松林林冠空隙结构基本属于高形状复杂性,树木之间的竞争较大。林分郁闭度随着林分高的增加而减小,随着相对密度的增大而增大。树高达15m时,冠幅和冠长基本趋于平稳的状态。冠幅和冠长随着林分高和立地指数的增大而增大,但冠幅随着相对密度和干形的增大而减小,冠长随着形数的增大而变小。
译 名：
Variation of Crown Shyness with Stand Factors in Larix olgensis Plantation
作 者：
Ju Wenzhen,Wang Xinjie,Fu Yao,Ma Wei,Sun Yujun(Key Laboratory for Silviculture and Conservation (Beijing Forestry University),Ministry of Education,Beijing 100083,P. R. China)
关键词：
Crown shyness; Canopy closure; Crown radius; Crown length; Tree height; Stand factors
摘 要：
The objectives of this study were to determine the stand factors that control crown shyness in Larix olgensis Henry plantations. Canopy closure (i.e. the inverse of crown shyness),crown radius and length,tree height,diameter at breast height,slenderness coefficient,and relative density were measured. And the relationships between these tree factors and crown factors were analyzed. The gap shape complexity index (GSCI) was used to study the crown structure of L.olgensis plantations. Results show that the L.olgensis stands have crown shyness structure with high GSCI,indicating an intensive competition between trees. Canopy closure decreased with increasing stand height and increased with increasing relative density. Crown radius and length reached a stable state when the tree height was 15 m. Crown radius and length increased with increasing stand height and site index,while crown radius decreased with increasing relative density and slenderness coefficient and crown length decreased with increasing slenderness coefficient.
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