Using morphological characteristics, root-shoot ratio, anatomical structure of leaves, leaf water holding and WSD analyzed the water holding ability of 11 tree species.

从形态特征、根冠比、叶片解剖构造、叶片保水力、水分饱和亏等方面分析了11个树种对干旱的适应性特征。

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The growth of root was promoted, and increased in root top ratio value and activity of root under moderate water stress (water content of soil is 60% the content of field holding water).

适度的水分胁迫（土壤含水量为田间持水量的60％）对苗期小麦根系生长有一定的促进作用，可使根冠比增加，根系活力增大；

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