钟祥市耕地生态价值时空分异研究

针对耕地资源流失、非农化问题频发的现状,以2005、2015年钟祥市耕地资源为例,运用替代市场法进行耕地生态价值时空分异研究。结果表明:钟祥市耕地生态价值中,调节大气价值占比为80.27%,土壤保持价值占比为13.27%,其他类型生态价值占比为6.46%;2005—2015年钟祥市生态价值总体变化率为0.62%;2005—2015年钟祥市耕地生态价值沿着西北方向发展,且分布越来越分散,平均中心西北方向约160 m处,移动方向与趋势椭圆长轴方向一致。根据分析得到以下结论:不同类型的生态价值存在较大的差异;不同类型的生态价值变化趋势不一,变化幅度不大;随着城乡一体化深入发展,耕地生态价值在空间上越来越分散。

Spatio-temporal Variability of Ecological Value of Cultivated Land in Zhongxiang

Aiming at the status quo of the loss of arable land resources and non-agricultural problems,taking the cultivated land resources of Zhongxiang City in 2005 and 2015 as an example,we studied the spatial and temporal variation of cultivated land ecological value by using the alternative market method.The results showed that:Among the ecological value of cultivated land in Zhongxiang City, the value of regulating the atmosphere is 80.27%,the value of soil conservation is 13.27%,the proportion of other types of ecological value is 6.46%.From 2005 to 2015,the ecological value of cultivated land in Zhongxiang City developed along the northwest direction,and its distribution was more and more dispersed. The average center of the farmland was about 160 m in the northwest direction,and the moving direction was consistent with the long axis of the trend ellipse.According to the analysis, the following conclusions were obtained:It ramained differences among different types of ecological valued land;the ecological value of different types in Zhongxiang presented different changing trends,but the change range was small generally;with the further development of urban-rural integration,the ecological value of arable land was more and more dispersed in space.