Darcy定律在测定油松木质部导水特征中的应用

该文介绍了一种测定油松幼树不同部位枝条导水性的方法———冲洗法 .在立地条件相同或相近的情况下 ,选择年龄相近的 4株油松幼树 (8～ 10年生 ) ,用冲洗法进行测量 .在此基础上 ,首次成功地将Darcy定律应用于树木木质部的导水特征分析 .结果表明 ,油松幼树在相对分枝级、冠层、分枝方向等不同的情况下 ,比导率表现出不同的变化趋势 .通过对平均比导率 (Ks)差异的进一步分析 ,能够较好地反映出油松木质部的导水特征和其在抗旱中的生态策略 .

Application of Darcy's laws in testing water conduc-tivity characteristics of Pinus tabulaeformis xylem.

This paper introduces the flushing method for testing water conductivity characteristics of twigs from different positions of young \%Pinus tabulaeformis.\% Four young \%Pinus tabulaeformis\% trees of similar age(8～10 years old) were selected and their water conductivity was measured by flushing method in the same or similar planting sites. Darcy\'s law was first successfully applied in analyzing water conductivity characteristics of xylem on above basis. The result indicates that the average specific conductivity of young \%Pinus tabulaeformis\% manifest dissimilar variation trends in different relative ramification class, crown layer, ramification direction and so on. The xylem water conductivity characteristics of \%Pinus tabulaeformis\% and its ecology strategy in resisting drought are better reflected through further analyzing the difference of the average specific conductivity (\%Ks\%).