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中国沙漠 ›› 2006, Vol. 26 ›› Issue (3): 403-408.

• 研究论文 • 上一篇    下一篇

荒漠植物持水力研究

何明珠1, 王 辉 2 *, 陈智平2   

  1. 1.中国科学院寒区旱区环境与工程研究所 沙坡头沙漠试验研究站,甘肃 兰州 730000;2.甘肃农业大学 林学院,甘肃 兰州 730070
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-05-20 发布日期:2006-05-20

Water-retaining Capability of Desert Plants

HE Ming-zhu1, WANG Hui2, CHEN Zhi-ping2   

  1. 1.Shapotou Desert Experimental Research Station, Cold and Arid Regions Environmental & Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;2.College of Forestry, Gansu Agricultural University, Lanzhou 730070, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-05-20 Published:2006-05-20

摘要: 持水力是表征植物耐旱性的一个重要指标。对62种荒漠植物,包括10种乔木、39种灌木和13种草本植物失水过程进行了测定,并对累计失水曲线进行逻辑方程的拟合,拟合方程的决定系数都在0.8以上。按照枝、叶构件所拟合的逻辑方程拐点不同,将荒漠植物分为弱持水型、中等持水型和强持水型。灌木和草本植物的持水能力较乔木植物强。从枝构件的分类结果分析,属于弱持水型、中等持水型和强持水型荒漠植物的植物种类依此为23种、26种及13种,说明多数植物枝条的持水能力不太强。而从叶构件的分类结果分析,依次有2种,19种和41种植物属于上述3种类型,说明大多数荒漠植物的叶片的持水能力较枝条强。

关键词: 荒漠植物, 持水力, 逻辑方程

Abstract: Water-retaining capability is one of the important indexes that indicate drought resistance capacity of plants. The dehydration process of 62 desert plants, including 10 tree species, 39 brush species and 13 herb species, were analyzed with fitting of Logistic curves, whose correlation coefficient are all more than 0.8. According to turn points (TP) distribution of different Logistic curves, those plants can be sorted into weak water-retaining capability type, medium water-retaining capability type and strong water-retaining capability type. The water-retaining capability of brush and herb species is stronger than that of tree species. Among the 62 desert plants there are 23 weak, 26 medium and 13 strong species respectively based on classification of branch configuration, which indicates that the branch water-retaining capability of most species is not strong enough; whereas there are 2, 19 and 41 species correspondingly according to classification of leave configuration, which suggestes that the water-retaining capability of leaves is stronger than that of branches.

Key words: desert plants, water-retaining capability, Logistic equation

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