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Published online by Cambridge University Press: 17 August 2009
INTRODUCTION
Land degradation in the People's Republic of China has accelerated over recent years for many reasons, including inappropriate land use practices and ineffective laws. Many land use initiatives in the past have not been well supported by legislation, resulting in severe environmental impacts in the dryland agricultural area of China. Land degradation now adversely affects around 40 percent of the area of China.
Definitions
Land degradation is a broad term that includes degradation of land, water, and vegetation, as well as the processes of soil erosion and desertification; it is defined as the “overall reduction in the capability of land to produce benefits from a particular use under a specific form of land management.” The Convention to Combat Desertification defines land degradation as
the reduction or loss, in arid, semi-arid and dry subhumid areas, of the biological or economic productivity and complexity of rain-fed cropland, irrigated cropland, or range, pasture, forest and woodlands resulting from land uses or from a process or combination of processes, including processes arising from human activities and habitation patterns, such as: (i) soil erosion caused by wind and/or water; (ii) deterioration of the physical, chemical and biological or economic properties of soil; and (iii) long-term loss of natural vegetation.
Desertification is defined in the Convention as “land degradation in arid, semi and dry sub-humid humid areas resulting from various factors, including climatic variations and human activities.”
Land degradation has been accelerated by ineffective laws and inappropriate land use practices.
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