摘要
运用随机抽样法抽取马尾松成熟林分50个小班,调查胸径、树高、单位蓄积量及密度等测树因子,运用回归分析法进行测树因子相关性分析,结果表明,林分蓄积量对于密度、胸径、树高之间存在显著线性关系,其相关性数学模型可用三元线性回归方程y=b0+b1x1+b2x2+b3x3表示,其中,密度是影响林分蓄积量的主导因素。相关性变化趋势分析表明,在兼顾林分产量和林木径级的情况下,合理保留密度每667 m2为105株。
Fifty subcompartment of matured stand of Pinus massoniana were extracted by using the random sampling method ; measurement tree factors （ DBH, tree height, volume ＆ density） were investigated ; using the regression analysis, the correlation of measurement factor was analyzed. Result shows that volume have significant linear relationship among density, DBH, tree height ;its relevance mathematical model can be expressed by three variable linear regression equation y=b0＋b1x1＋b2x2＋b3x3 ;among them, the density is the dominant factor of affecting volume stand. The analysis on variation trend of the correlation shows that ：consideration to yield ＆ tree diameter, reserved density of 105 trees was considered to be optimal.
出处
《防护林科技》
2012年第4期49-51,共3页
Protection Forest Science and Technology
关键词
马尾松
林分密度
胸径
蓄积量
相关性
主导因子
保留密度
Pinus massoniana
stand density
DBH
volume
correlation
dominant factor
reserved density
