摘要
为掌握金沙江流域耕地地力基本情况,科学指导农业生产,以云南省绥江县为例进行耕地地力评价研究。文章采用GIS技术,利用土地利用现状图、土壤图及行政区划图叠置划分法确定评价单元,选取土壤管理、立地条件、剖面与耕层理化性状等16个评价因子,采用模糊数学理论确定指标隶属度,借助层次分析法对评价单元的指标隶属度进行加权求和计算耕地地力综合指数,运用累积曲线法将绥江县耕地划分为6个等级,其中,1级耕地630.69hm^2、2级耕地477.14hm^2、3级耕地2 092.64hm2、4级耕地1 594.71hm^2、5级耕地3 231.31hm^2、6级耕地2 315.04hm^2,分别占总面积1.034 153万hm2的6.10%、4.61%、20.24%、15.42%、31.25%、22.38%;同时,将绥江县中低产田地划分为3种类型,其中,旱耕地坡地梯改型5 974.55hm2、旱耕地瘠薄培肥型1 296.94hm^2、稻田渍涝潜育型387hm^2,分别占总面积的57.77%、12.54%、3.74%。并针对影响耕地质量的障碍因子提出改良利用建议。
To get the basic situation of soil fertility of cultivated land in Jinsha River basin and guide agricultural production,taking Yunnan Province of Suijiang County as an example,this paper evaluated the cultivated land fertility based on GIS Technology. Firstly,the evaluation unit of land use was determined using the method of overlayingland use map,soil map and administrative zoning map. And then 16 factors such as soil management,site conditions,soil profile and the physicochemical properties,etc.,were selected as the indicators for the cultivated land fertility evaluation. Finally,the comprehensive index of cultivated land productivity was calculated based on the weighted sum of the index degree of the evaluation unit using the fuzzy mathematics theory and the analytic hierarchy process,and the cultivated land grades were calculated by using the cumulative frequency curve method. The results showed that the cultivated land in Suijiang County was classified into 6 grades,the cultivated land from the highest to lowest level were 630. 69hm^2,477. 14hm^2,2 092. 64hm^2,1 594. 71hm^2,3 231. 31hm^2,and 2 315.04hm^2,respectively,accounting for 6. 10%,4. 61%,20. 24%,15. 42%,31. 25%,22. 38% of the total area.At the same time,The low yield land of Suijiang county was divided into 3 types,i. e.,the upland slope change ladder type,dry farmland barren fertilizer type,and paddy waterlogged Gleyed type,accounting for 57. 77%,12. 54%,3. 74% of the total area,respectively. Finally it put forward somesuggestionsaiming at the obstacle factors affecting the quality of cultivated land improvement and utilization.
出处
《中国农业资源与区划》
北大核心
2016年第1期9-16,共8页
Chinese Journal of Agricultural Resources and Regional Planning
基金
国家农业部测土配方施肥补贴项目"绥江县耕地地力评价"
关键词
GIS
耕地地力
评价
金沙江流域
绥江县
GIS
cultivated land fertility
evaluation
Jinsha River basin
suijiang county
