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| 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 |
| Gansu Desert Control Research Institute, Wuwei 733000, Gansu, China |
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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.
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Received: 06 May 2003
Published: 20 December 2004
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2004, Vol. 24 
