| 摘要: |
| 【目的】对陕西定边县耕地种植玉米的适宜性进行评价，旨在为耕地的科学管理及可持续利用提供参考依据。【方法】以地处黄土高原与鄂尔多斯荒漠草原连接的陕西省定边县为例，通过野外调查与室内分析，在 GIS 技术的支持下，将土壤图、土地利用现状图和行政区划图叠加确定评价单元，结合层次分析法、模糊评价法等数学方法，从土壤管理、土壤养分、土壤性质、立地条件 4 个方面共选取 10项指标，对定边县耕地种植玉米适宜性进行了定量评价，并分析了影响该地区耕地种植玉米适宜性的主要指标。【结果】陕西省定边县耕地种植玉米适宜性可分为最适宜、适宜、次适宜和不适宜4个等级，玉米种植最适宜区、适宜区、次适宜区和不适宜区的面积分别为53 185.64，121 634.76，57 681.57和10 801.20 hm2，分别占耕地总面积的21.86%，49.99%，23.71%和4.44%；通过层次分析法的组合权重可知，坡度、地貌类型、灌溉能力、土壤质地、有机质和碱解氮为影响该地区耕地种植玉米适宜性的重要指标。【结论】陕西省定边县耕地总体上比较适宜种植玉米，次适宜耕地可以通过改造提高种植玉米的适宜性，不适宜的耕地可以从事其他作物的种植或用作他用。 |
| 关键词: GIS 空间分布 耕地 玉米种植 适宜性评价 复杂地貌 陕西省定边县 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金项目(30872073) |
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| GIS based farmland suitability evaluation of corn planting in Dingbian,Shaanxi |
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WANG Lu-ming,CHANG Qing-rui,BAI Xue-jiao
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| Abstract: |
| 【Objective】This study evaluated corn planting suitability in Dingbian,Shaanxi based on GIS.【Method】Taking the connection area of Loess Plateau and the Ordos desert steppe in Dingbian,Shaanxi Province as an example,the corn planting suitability was evaluated through field investigation and laboratory analysis in support of GIS technology.Evaluation units were determined by stacking of soil map,land use map and administrative map,and 10 indexes were selected from soil management,soil nutrients,soil properties,and site conditions in combination with the analytic hierarchy process,fuzzy evaluation and other mathematical methods.Main factors influencing the corn planting suitability were analyzed as well.【Result】Farmlands in Dingbian,Shaanxi could be divided into four grades based on corn planting:the most appropriate,appropriate,less appropriate and inappropriate,with areas of 53 185.64 hm2,121 634.76 hm2,57 681.57 hm2 and 10 801.20 hm2 (accounting for 21.86%,49.99%,23.71% and 4.44 % to the area of total arable land),respectively.Factors influencing the corn planting suitability included slope,landform type,irrigation capacity,soil texture,organic matter and nitrogen.【Conclusion】In general,most of the land in Dingbian,Shaanxi was suitable for corn planting.Less appropriate land could be improved after alteration while inappropriate land should be used for other purposes. |
| Key words: GIS spatial distribution farmland corn planting suitability evaluation complex topography Dingbian,Shaanxi |
