长岭岗林场日本落叶松幼龄材干缩性能研究

测定了建始县长岭岗林场引种栽培的12年生日本落叶松标准木干缩性能指标，并分析了来自两个样地的20株样木株同差异，其结果表明：干缩性能指标问差异不显著；径向全干干缩率为4．64，弦向全干干缩率为6．81，体积全干干缩率为10．81。全干差畀干缩为1．47；径向气干干缩率为2．41，弦向气干干缩率为3．93，体积气干干缩率为6．59，气干差异干缩为1．63。在此基础上，讨论了日本落叶松的栽培与木材利用中的有关问题和新旧标准下测定的干缩性能指标的换算与利用。

Research on the Shrinkage of Larix kaempferi (Lamb.)Carr. Juvenile Wood in Changlinggang Forest Farm

In this paper,the index of drying shrinkage of Larix kaempferi (Lamb.) Carr. normal tree of 12 - year - old in Changlinggang forest farm located in Jianshi County was measured, and the variation pattern of 10 normal tree from two shape lands was analyzed. It showed that the radial- shrinkage of absulute- dried wood was 4.64, percent tangential - shrinkage was 6.81 percent,volume -shrinkage was 10.81 percent and shrinkage ratio of tangential to radial was 1.47.As air- dried wood, its radial- shrinkage was 2.41 percent, tangential- shrinkage was 3.93 percent, volume- shrinkage was 6.59 percent and shrinkage ratio of tangential to radial 1.63. These indices of drying shrinkage were no obvious differences. How to cultivate and use wood and how to use these indices of drying- shrinkage between new and old standards were discussed.