基于GIS的新疆后备耕地资源评价

GIS-based suitability evaluation of uncultivated arable land in Xinjiang Region

明确后备耕地资源的总量及分布是耕地资源跨区域流动的前提。该文构建了新疆后备耕地资源的自然-生态-经济适宜性评价指标体系,以1km2栅格数据和统计数据为基础,基于GIS评价县域后备耕地资源数量及分布。结果表明:①自然-生态适宜的后备耕地资源147.41万hm2,各县分布面积从0.01～17.65万hm2不等;②自然-生态-经济适宜的后备耕地总量为97.61万hm2,分布在65个县;③适宜开展耕地跨区域开发的后备耕地资源97.19万hm2,分布在51个县。随着评价约束条件的增加,新疆适宜开发的后备耕地资源总量逐渐减少,生态风险和经济成本对耕地跨区域流动的影响需要更深入地研究。

It＇s a foundation for interregional flows of arable land resource to indentify the amount and layout of uncultivated arable lands.Taking Xinjiang Province as a case, an evaluating indicator system including natural suitability, ecological suitability and economic suitability was set up, 1 km^2 grid and county was taken as evaluating units to analyze the total area and layout of uncultivated arable lands. The results showed that： ①the total area with natural and ecological suitability was 1.47 million hm^2, and areas ranged from 100 hm^2 to 176500 hm^2 in different counties. ②the total area with natural, ecological and economic suitability was 976100 hm^2, which distributed in 65 counties. ③The area of uncultivated land suitable for interregional flows of arable land was 971900 hm^2, which distributed in 51 counties. The conclusion is that with the addition to restriction conditions for land evaluation, the amount of uncultivated arable land decreases steadily and impacts of ecological risk and economic cost on interregional flows arable need further study.