甘肃省白水江自然保护区杜仲林生长现状及生态因子影响分析

Investigations of eucommia growth situation and influence analysis of important ecological factors in Baishuijiang National Reserve in Gansu

杜仲被确定为甘肃省白水江自然保护区持续林业试验基地的主要人工栽培示范经济树种。通过对林木生长状况调查和主要生态因子测定，利用方差分析和多重比较，发现各样地之间存在显著差异。主成分分析表明，海拔是影响杜仲生长最敏感因子，而加强林地抚育和管护是保证林木良好生长的关键措施。

Eucommia (Eucommia ulmoides) was determined as one kind of important economical model tree species of the sustainable development forest experimental base in Baishuijiang National Natural Reserve of Gansu. The Variance Analysis and repeated comparation were carried out based on the investigations of growth situation and observations of some ecological factors. The results show that there are differences among sample plots. Elevation is the most sensitive factor of the principal component analysis. The paper draws a conclusion in the end that at tending and management are important measures to promote Eucommia growth.