摘要
根据 16 0株样木资料 ,以年龄 (X1)、胸径 (X2 )、树高 (X3 )、枝下高 (X4 )、冠幅 (X5)为说明变量 ,建立以立木干材材积 (Y)为基准变量的收获模型。
According to the details of 160 sample trees of Alnus cremastogyne,five factors such as age(x 1),DBH(x 2),height(x 3),under branch height(x 4),and crown breadth(x 5)were measured and thought to be following variable,with the standing tree volume(Y)as basic variable,the gain model were established.
出处
《江西林业科技》
2000年第S1期6-8,共3页
Jiangxi Forestry Science and Technology
关键词
四川桤木
干材材积
收获模型
Alnus cremastogyne
Trunk volume
Gain model
