摘要
取材于 9年、1 7年、2 7年 3个龄组的天然林与人工林 ,分别按胸径与材积株数分布进行比较。分析结果表明 :1胸径株数分布除 2 7年人工林向右偏斜外 ,其余均为左偏 ,而其削度均为负值 ,即胸径株数分布曲线均比正态曲线平坦 ;2材积株数分布均为左偏 ,削度除 2 7年为负值外 ,其余均为正值 ,即材积株数分布曲线均比正态曲线尖削 ;3均值显著检验结果除 9年生天然林与人工林材积有显著差异 (0 .0 5水平 )外 。
Three age grade samples came from Natural forest respectively and artificial forest were studied in this paper,compared with the difference of average chest diameter and average volume of same age but different origin stand,the quantity distribution regularity according to chest diameter and volume respectively of different origin stand.The results were useful to referent in practice in some limit.
出处
《江西林业科技》
2000年第3期9-10,共2页
Jiangxi Forestry Science and Technology
关键词
不同起源林
林分
胸径
材积
株数分布
Different origin
Stand
Chest diameter
Volume
Quantity distribution
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