华北落叶松人工幼林生长规律研究

Preliminary Study on the Growth Pattern of Larix principis-rupprechtii Plantation Young Forest

以华北落叶松人工幼林为研究对象,连续8年对林木生长状况进行测试的结果表明:5~9月树高生长量占全年生长量的90%以上,变异系数最大值出现在第5年,偏度、峰度最大值均出现在第2年,随着林龄的增加而减小。5~9月地径生长量占全年生长量的80%以上,第4年变异系数值最大,偏度值随着林龄的增加呈下降趋势。

In this paper, the growth pattern of Larix principis-rupprechtii were studied for eight years. Theresults showed that the growth of tree height from May to September accounted for more than 90% of theannual. The maximum value of variation coefficient was in the fifth year. The maximum value of skewnessand kurtosis appeared in the second year,afterwards,it decreased with the increase of forest age. The growthof the ground diameter from May to September accounted for more than 80% of the annual growth. Themaximum value of variation coefficient was in the fourth year. From the first year, the skewness valuedecreased with increasing age.