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中国沙漠 ›› 2004, Vol. 24 ›› Issue (6): 729-733.

• 研究论文 • 上一篇    下一篇

干旱区沙漠化土地逆转植被的时空格局及其机制研究

王继和, 马全林, 杨自辉, 刘虎俊, 詹科杰   

  1. 甘肃省治沙研究所, 甘肃武威 733000
  • 收稿日期:2003-05-06 修回日期:2003-06-08 出版日期:2004-12-20 发布日期:2004-12-20
  • 通讯作者: 詹科杰
  • 作者简介:王继和(1949-),男(汉族),甘肃民勤县人,研究员,主要从事沙漠治理与沙区植物生理生态学研究。
  • 基金资助:
    国家"十五"攻关项目(2002BA517A09)资助

Space-time Pattern and Driving Mechanism of Desertification Land Reversion in Arid Area

WANG Ji-he, MA Quan-lin, YANG Zi-hui, LIU Hu-jun, ZHAN Ke-jie   

  1. Gansu Desert Control Research Institute, Wuwei 733000, Gansu, China
  • Received:2003-05-06 Revised:2003-06-08 Online:2004-12-20 Published:2004-12-20

摘要: 在无灌溉条件下, 干旱区沙漠化土地实现逆转和植被的恢复的降水量要在160mm左右, 而方法是沙漠化土地逆转成败的关键之一。明沙嘴采取的从沙源上风向边缘开始的人工辅助措施加封育的治沙实践证明, 减少人为干预, 主要利用自然力的作用, 能达到流沙固定, 植被增加, 沙漠化土地逆转的目的。人工辅助措施加封育后植被群落在经历约20a的由简单到复杂演变的同时, 种的个数、类型、密度、空间格局等方面都发生了一系列的变化。

关键词: 干旱区, 沙漠化土地, 逆转, 植被, 时空格局

Abstract: The 160 mm precipitation is the threshold for desertification land reversion and vegetation recover under no irrigation in arid area, and the method is the key of successes. Practice for desertification land reversion in south fringe of Tengger Desert proved that the integrated countermeasures of desertification land enclosure compounded with artificial assistant methods at windward region could fix mobile sand dune by making use of elemental function; finally reach the purpose of increasing vegetation coverage and reversing desertified land. In the succession of vegetation community in test region for 20 years there were a series of changes from simple to complicated, which incarnated on the number, type, density, space pattern of species and so on.

Key words: arid area, desertification land, reversion, space-time pattern

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