| 半干旱草原主要植物光能和水分利用特征的研究 |
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| 引用本文： | 崔骁勇,陈佐忠,杜占池.半干旱草原主要植物光能和水分利用特征的研究[J].草业学报,2001,10(2):14-21. |
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| 作者姓名： | 崔骁勇 陈佐忠 杜占池 |
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| 作者单位： | 1. 中国科学院植物研究所,
2. 中国科学院自然资源综合考察委员会, |
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| 基金项目： | 自然科学基金重大项目!(49790 0 2 0 )，中国科学院特别支持项目!(KZ95T - 0 4) |
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| 摘 要： | 在植物生长季内测定了内蒙古半干旱草原6种主要植物的光合和水分利用特征，比较了植物之间在光能和水分利用方面的差异，认为水分利用效率难以反应植物对干旱的适应性，而其倒数－水分竞争系数是较好的表征指标；植物的光能利用效率和水分竞争系数之间存在补偿关系；半干旱草原主要植物适应环境的方式不同，它们在光能和水分资源生态位上存在分离。
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| 关 键 词： | 半干旱草原 水分竞争能力 补偿 生态位分离 光能利用效率 演替 适应机制 |
| 文章编号： | 1004-5759(2001)02-0014-08 |
| 修稿时间： | 2000年3月6日 |
Study on light- and water- use characteristics of main plants in semiarid Steppe |
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| CUI Xiao yong ,CHEN Zuo zhong ,DU Zhan chi.Study on light- and water- use characteristics of main plants in semiarid Steppe[J].Acta Prataculturae Sinica,2001,10(2):14-21. |
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| Authors: | CUI Xiao yong CHEN Zuo zhong DU Zhan chi |
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| Institution: | CUI Xiao yong 1,CHEN Zuo zhong 1,DU Zhan chi 2 |
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| Abstract: | Characteristics of photosynthesis and water use of six main plants were experimentally studied and compared in the semiarid steppe in Inner Mongolia during growth season. It was suggested that water use efficiency (WUE) was not able to demonstrate the adaptation of different plants to arid condition. However, its reciprocal, namely water competitive coefficient, fitted well with plant adaptation. Light use efficiency and water competitive coefficientwas on trade off. Plants living in semiarid steppe had various adaptive strategies. They separated in light and water resource use niches. |
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| Keywords: | semiarid steppe water competitive capacity trade off niche separation |
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