农业可持续发展的生态安全评价初探——以湖南省为例

生态安全是农业可持续发展的核心和基础。从生态安全的概念、特性、国内外研究现状、研究方法等方面,对生态安全研究进行了评述。以湖南省为案例,运用层次分析法,从资源—生态—环境压力,资源—生态—环境质量和资源—生态—环境整治及建设能力3个方面建立指标体系,对湖南省农业可持续发展的生态安全进行综合评价。结果表明,湖南省农业生态安全状况呈现出较明显的地域分异特征,其空间格局大致从东向西,从南向北逐渐降低,但局部地区有差异。说明生态环境质量是湖南省农业生态安全空间分异的基础,但资源—生态—环境压力及整治、建设能力等也在很大程度上影响了其空间格局。提出了区域农业可持续发展的生态安全建设对策。

Evaluation on Eco-security of Agricultural Sustainable Development—A Case Study in Hu''''nan Province

Ecological security is the key part and base for agricultural sustainable development.A review of ecologi- cal security was given from the aspects of concepts,features,and meanings,status and methods,as well as themes of studies on ecological security at home and abroad.By taking a county as a basic unit,an integrated evaluation of agricultural ecological security in Hunan Province was made in terms of the pressure,quality,rehabilitation ability of resource-ecology-environment,using the technique of AHP.The result indicates that regional heterogeneity of security degree is distinct,which not only decreases from east to west,but also decreases from south to north, with the exception in a few areas.The quality of resource-ecology-environment is the base of spatial patterns for a- gricultural eco-security in Hu' nan Province.However,the pressure and rehabilitation ability of resource-ecology- environment also have a great impact on ecological security and influence its spatial pattern.The strategy for estab- lishing ecological safety of agricultural sustainable development is pointed out as well.