四川巨桉短周期工业原料人工林生长规律研究

An Research on the Growth Laws of Eucalyptus grandsis in Sichuan Province

在区划立地的基础上 ,将收集的四川巨桉短周期工业原料人工林的标准地材料按好、中、差三个立地等级 ,采用理查兹方程 (Richards)对样本的各项生长指标 (胸径、树高、材积 )进行了拟合 ,经计算得生长预测表。研究表明 ,立地条件好的林分各项生长指标都好于立地差的林分。通过对材积生长的分析 ,确定了三种立地条件下巨桉林分的数量成熟龄。

By using Richards equation,the table of growth forecasting was obtained through imitating and calculating the growth factors(DBH,height,volume) of Eucalyptus grandsis because the site conditions of sample plots were divided into three groups(superior,middle,and inferior).The results showed that the growth of DBH,height and volume in superior sites were better than those in inferior ones.At last,the ages of volume maturity in three sites were achived by analyzing the growth of volume.