杜仲人工林中的邻体干扰

The Neighborhood Effect of Eucommia ulmoides Plantation

本文研究了四川地区杜仲 (Eucommiaulmoides)人工林 ,杜仲个体生长速度与邻体效应之间的相互关系。以杜仲个体为基株 ,3m为半径圆内的个体均被定义为邻体 ,采用张大勇改进的干扰指数模型和杜仲的生长速度进行回归分析 ,发现杜仲生长速度与邻体干扰指数之间有显著的线性关系。研究结果表明 ,杜仲林内 ,杜仲个体之间表现为强烈的种内竞争 ,个体生长的动力来自杜仲各个体对资源竞争所引起的自疏作用 。

A study about the relation of the growing speed of individuality in the Eucommia ulmoides artificial grove in Sichuan Province is presented here,taking the individuality Eucommia ulmoides to basic tree,the individuality in circumference of 3 m radius is defined as neighborhood.Using improved interference index model by Zhang Dayong,computing the interference index and analysing the relation of the growing speed and interfarance index,it is discovered that there is markable linear relation of the growing speed and interference index.The results have shown that there is a strong competition in the same pattern among the individual of Eucommia ulmoides .The driving force of the individual growing is from themselves dispersing being caused by the competition to natural resources by the different individual of Eucommia ulmoides .The existence of the neighborbood effect is important theory basis for determining rational management density of Eucommia ulmoides plantation.