地形因素对桤木人工林生长和树干公定容重的影响

本文应用四个地形因子在两个水平下的正交试验设计方法,系统分析了13年生桤木人工林胸径和树高生长以及树干公定容重的变化规律。结果表明,影响桤木人工林胸径和树干公定容重的首要地形因子是坡形,其次是坡向,再者是坡位,而小于45°的坡度影响不显著;影响桤木人工林树高的首要地形因子是坡形,其次是坡位,再者是坡向,小于45°的坡度影响同样不显著。

Effect of Terrain on Growth and Trunk's Basic Volume Weight of Alnus cremastogyne from Plantation

An orthoganal design with four terrain factors under two levels was carried out to systematically analyze the law of variation on diameter, height and trunk's basic volume weight of 13-year-old Alnus cremastogyne from plantation. The results showed that slope form was the most important factor which influenced diameter, height and trunk's basic volume weight of Alnus cremastogyne from plantation and the slope with less than 45 degree influenced the diameter and height insignificantly. As to diameter growth and trunk's basic volume weight, slope aspect is the second important influencing factor and position on the slope is the third one; as to height growth, position on the slope is the second important influencing factor and followed by the slope aspect.