| Status and countermeasures of soil desertification in northeast part of Gansu Province |
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| DOI：10.7606/j.issn.1000-7601.2006.01.38 |
| Key Words: northeast part of Gansu province status of desertification course of desertification countermeasure |
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| Abstract: |
| The located observations and investigations were conducted to study the status and causes of soil desertification in northeast part of Gansu Province.The results show that there is 210 496 hm2 desert land in the observed region, being 38.9% of the total land area (540 950 hm2) .The sand line is expanded eastward by 0.54 km averagely each year.The specific geological formation and Maowusu desert are favorable to the course of desertification.The arid and windy climate, the natural disasters such as water and wind erosions and the unreasonable utilization of resources produce severe harms to agricultural production.The countermeasures for preventing soil desertification are put forward as follows: plant grass and combine both grass and shrub together;set up the system of "grass-shrub-arbor" and the compound ecological system of "forestland-grassland-cropland" to control the movement of sands;plant shrubs or Astraglus adsurgens that can be used for grazing in desert land;strengthen the consciousness of people in preventing and controlling desertification by propagandas;hold out the excessive cultivation of land by legislation;encourage the restoration of farmland to forests and grasses so as to improve the sustainable development of economy in desert regions. |