| Soil degradation: a global problem endangering sustainable development |
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| 作者姓名： | CHEN Jie CHEN Jing-zhang TAN Man-zhi GONG Zi-tong |
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| 作者单位： | Institute of Soil Science，CAS，Nanjing 210008，China |
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| 基金项目： | Key State Basic Research Program of China No. G1999045707 |
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| 摘 要： | 1 Introduction Soil is not only the major natural resource on which human being depends for the production of food, feed, fiber, renewable energy and raw materials, but also plays a key role in maintaining the complex terrestrial ecosystems and climate systems of this planet. Recent rapid increase in the human population is placing a great strain on the worlds soil resources. Only about 11% of the global land surface covered by the soils are being used to raise crops and livestock, in other …
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| 收稿时间： | 30 December 2001 |
| 修稿时间： | 10 February 2002 |
Soil degradation: a global problem endangering sustainable development |
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| CHEN Jie,CHEN Jing-zhang,TAN Man-zhi,GONG Zi-tong.Soil degradation: a global problem endangering sustainable development[J].Journal of Geographical Sciences,2002,12(2):243-252. |
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| Authors: | Chen Jie PhD Chen Jing-zhang Tan Man-zhi Gong Zi-tong |
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| Institution: | Institute of Soil Science, CAS, Nanjing 210008, China |
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| Abstract: | Soil degradation, defined as lowering and losing of soil functions, is becoming more and more serious worldwide in recent decades, and poses a threat to agricultural production and terrestrial ecosystem. It is estimated that nearly 2 billion ha of soil resources in the world have been degraded, namely approximately 22% of the total cropland, pasture, forest, and woodland. Globally, soil erosion, chemical deterioration and physical degradation are the important parts amongst various types of soil degradation. As a natural process, soil degradation can be enhanced or dampened by a variety of human activities such as inappropriate agricultural management, overgrazing, deforestation, etc. Degraded soil means less food. As a result of soil degradation, it is estimated that about 11.9-13.4% of the global agricultural supply has been lost in the past five decades. Besides, soil degradation is also associated with off-site problems of sedimentation, climate change, watershed functions, and changes in natural habitats leading to loss of genetic stock and biodiversity. Therefore, it is essential to combat soil degradation at different levels and scales worldwide, not only for food security and ecological health, but also for the guarantee of global sustainable development. |
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| Keywords: | soil soil degradation erosion food security sustainable development |
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