基于适宜性评价的草原牧区县(旗)域国土三类空间划定研究

Study on three types of land spatial delimitation in county(banner)region of grassland pastoral area based on suitability evaluation

草原牧区草地生态系统不仅是畜牧业发展的基础,更具有巨大的生态价值,因此其国土三类空间的划定尤为重要。以四子王旗为研究区从目标层、准则层和指标层构建国土空间适宜性评价指标体系进行适宜性评价的基础上划定国土三类空间。结果表明:研究区99.08%的国土需加强生态保护,适宜农业生产的国土占比为7.58%,适宜城镇建设的国土只占2.34%。基于适宜性评价结果及最适宜等级优先、生态保护优先和因地制宜原则划定的国土三类空间中生态空间占比为89.28%,分布在北部及中部大部分区域;农业空间占比为7.62%,分布在南部以丘陵和滩地为主的旱地农业发展区;城镇空间占比为3.10%,分布在旗政府所在地乌兰花镇及其周边地带。

The grassland in grassland pastoral areas is not only the basis for the development of animal husbandry,but also has great ecological value.Therefore,the delimitation of three types of land space is particularly important.In this paper,Siziwang Banner is taken as the study area,and three types of land space are defined based on the suitability evaluation of the land space suitability evaluation index system constructed from the target layer,the criterion layer and the indicator layer.The results show that 99.08%of the land in the research area needs to strengthen ecological protection,with 7.58%suitable for agricultural production and only 2.34%suitable for urban construction.Based on the suitability evaluation results and the principle of priority of the most suitable grade,priority of ecological protection and adaptation to local conditions,the proportion of ecological space in the three types of land space is 89.28%,which is distributed in most areas in the north and middle,with agricultural space accounting for 7.62%.It is distributed in the southern dryland farming agricultural development zone,which is dominated by hills and beaches.The proportion of urban space is 3.10%,which is distributed in Wulanhua Town,where the flag government is located,and its surrounding areas.