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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 .
In this paper, a method to determine the water conductivity of the branches of saplings of Pinus tabulaeformis seedlings, called flushing method, was studied in this paper.Among the site conditions were the same or similar, 4 saplings of young Pinus tabulaeformis (8-10 years old) , And measured by washing method.On the basis of this, Darcy’s law was successfully applied to the analysis of hydraulic conductivity of the xylem in the tree for the first time.The results showed that in the relative branching, canopy and branching directions , The specific conductivity showed different trend.The further analysis of the difference of average specific conductivity (Ks) can well reflect the hydraulic conductivity of Pinus tabulaeformis and its ecological strategy in drought resistance.