秋季油松雪倒原因分析及其推论  

Corollaries and Analysis of Pinus tabuliformis Fell Down Caused by Snow on Autumn

作　　者：马和 张晓明 王俊杰 

机构地区：[1]甘肃省林业科学研究院,甘肃兰州730020 [2]甘肃省国家级兴隆山自然保护区管理局,甘肃榆中730117

出　　处：《甘肃林业科技》2014年第4期76-80,共5页Journal of Gansu Forestry Science and Technology

基　　金：国家科技支撑计划项目"2011BAK12B08"资助

摘　　要：利用静力学模型建立树体力矩平衡方程,分析甘肃省兴隆山自然保护区麻家寺秋季油松雪倒现象,提出雪倒三大成因为土体抗剪强度、根系生长分布特征和偏冠,郁闭林分中他感作用则是导致偏冠的主要因素,并分析指出他感作用还会导致根系呈偏态分布,进一步加重雪倒危险。进而推论分析了树木抗雪倒、风倒的形态特征,以及坡面泥石流起动机制。The article analysis of Pinus tabuliformis fell down caused by snow on autumn in Majiasi of Xinglongshan national nature reserve based on tree torque balance equation which established by static＇ s model. Put forward the reason are shear strength of soil, root growth distribution and partial crown. Further pointed out that allelopathy is the main factor that leads to partial crown in closed forests which can leads to the asymmetrical distribution of root, thus further danger. The last, the authors analyzed the morphological characteristics of snow-resistant and the starting mechanism of slope debris flow.

关 键 词：秋季 油松 偏冠 力矩平衡方程 他感作用 

分 类 号：S791.254[农业科学—林木遗传育种]