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作 者 ：翟洪波,李吉跃,姜金璞

期 刊 ：生态学报 2002年 22卷 11期 页码：1890~1895

关键词：油松；侧柏；冲洗法；水力结构；

Keywords:Pinus tabulaeformis, Platycladus orientalis, flushing method, hydraulic architecture,

摘 要 ：油松侧柏是分属两个不同耐旱类型的树种 ,为了进一步了解其在水分运输和耐旱机理方面的特点 ,应用水力结构的基本理论 ,在正常水分条件下 ,用改良的冲洗法测定 4年生油松侧柏苗木各部位的水力结构参数。实验和模拟的结果表明 ,油松和侧柏苗木都存在限速区 ;在非限速区 ,二者各部分木质部的导水率、比导率、叶比导率和胡伯尔值都随功能木质部直径的增加而增大 ,但表现出不同的变化趋势 ,这些变化能较好地说明油松和侧柏苗木耐旱的生态策略。在功能木质部直径相同的情况下 ,油松苗木水力结构的各参数均较侧柏大。

Abstract:Pinus tabulaeformis and Platycladus orientalis are two different types of drought tolerant tree species. In order to further understand the mechanisms of water transportation and drought tolerance, the present study, using the basic theory of hydraulic architecture, measured and analyzed the hydraulic architecture parameters of P. tabulaeformis and P. orientalis seedlings (4 years old) using improved flushing method with normal water supply. The results showed that both P. tabulaeformis ...

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