摘要
本文通过对地处亚热带南端的雷州半岛5年生尾叶桉(Eucalyptus urophylla S.T.Blake)3种不同造林密度:①2500株/hm^2、②1666株/hm^2和③111株/hm^2的林分中,密度与胸径、优势高、冠幅、形数、单株材积和蓄积等相关关系的详细分析,得出了尾叶桉密度作用规律和8个相关模型。其中,密度对胸径的影响最敏感,不但影响胸径的大小,而且影响胸径的分布;同时这种影响还波及到形数、冠幅、单株材积和蓄积;密度对优势高的影响不显著。同时经过经济效益分析,得出了最佳初植密度和最佳采伐年龄。
Three kinds of planting density ( ①2500 tree/hm^2, ②1666 tree/hm^2, ③ 1111 tree/hm^2 ) of 5 year Encalyptus urophylla S.T.Blake were set in Leizhou peninsula in Southern Sub-Tropical. Density rule and 8 functicns are introduced after analyzing the diameter at breast height(DBH), dominant height, crown area, form factor, individual tree volume and volume relative to density. DBH change quickly the size and distribution relative to density, results in the variation of form factor, crown area, individual tree volume and volume.Dominant height is not relative to density. According to the analysis of volume and economic benefit, the optimum initial planting density and rotation are determined.
出处
《桉树科技》
1995年第2期20-29,共10页
Eucalypt Science & Technology
基金
国家"八五"攻关课題"桉树纸浆材优化栽培模式"的部分内容
关键词
桉树
尾叶桉
密度
经济效益
造林
Eucalyptus urophylla
planting density
DBH
Volume Economic benifit
