| 北方主要造林树种耐旱机理及其分类模型的研究──叶保水力及维持膨压 |
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| 引用本文： | 张建国, 李吉跃.北方主要造林树种耐旱机理及其分类模型的研究──叶保水力及维持膨压[J].河北林果研究,1995(3). |
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| 作者姓名： | 张建国 李吉跃 |
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| 作者单位： | 中国林科院林研所，北京林业大学 |
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| 摘 要： | 从叶保水力及维持膨压两个方面，对２１个不同耐旱机理树种的耐旱生理特点进行了比较研究。结果表明：高水势延迟脱水耐旱树种（油松、樟子松、长白松、华山松、白皮松、火炬树、二白杨、华北落叶松）具有很强的保水力和维持膨压的能力；低水势忍耐脱水耐旱树种（山杏、山桃、栾树、文冠果、花椒、白榆、新疆杨、杜仲、红柳、沙枣、毛条、胡杨）则表现出较弱的保水力和维持膨压的能力。
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| 关 键 词： | 水势，耐旱性，保水力，膨压 |
STUDIES ON CLASSIFICATION MODELS AND MECHANISMS OF DROUGHT TOLERANCE OF MAJOR AFFORESTATION SPECIESIN NORTH CHINA Water-HoldingAbility and Maintenance of Turgor |
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| Zhang Jianguo.STUDIES ON CLASSIFICATION MODELS AND MECHANISMS OF DROUGHT TOLERANCE OF MAJOR AFFORESTATION SPECIESIN NORTH CHINA Water-HoldingAbility and Maintenance of Turgor[J].Hebei Journal of Forestry and Orchard Research,1995(3). |
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| Authors: | Zhang Jianguo |
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| Abstract: | The physiological characteristics of drought tolerance of tree specics which possessdifferent mechanisms of drought tolerance were studied with respect to leaf water-holdingability and maintenance of turgor in this paper. The results show that the tree species whichbelong to drought tolerance with dehydration postponment at high tissue water potentialhave the strong abilities to hold water and maintain turgor, which are one of the most impor-tant characteristics of drought tolerance. But the species which belong to drought tolerancewith dehydration tolerance at low tissue water potential possess weaker ability to hold waterand maintain turgor. This indicates that the classification of basic types of mechanisms ofdrought tolerance in tree species are based on the physiological characteristics of drought tol-erance. |
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| Keywords: | water potential drought tolerance water-holding ability turgor |
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