| 袁 媛,胡晓黎,雷 蕾,等.基于GIS的秦岭山区县域耕地地力调查与评价研究[J].广东农业科学,2020,(7-8):- |
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基于GIS的秦岭山区县域耕地地力调查与评价研究 |
| Study on the investigation and evaluation of cultivated land capacity in mountainous area of South Shaanxi Based on GIS |
| 投稿时间：2020-06-01 修订日期：2020-06-01 |
| DOI： |
| 中文关键词: 秦岭山区 耕地地力 参评因子 评价研究 GIS |
| 英文关键词: Mountainous region Qingling Mountains Evaluation of cultivated land capacity Evaluating factors GIS |
| 基金项目:国家863计划课题“作物生长信息的快递获取与解析技术”(2013AA102401)；国家“十二五”科技支撑计划“旱区多遥感平台农田信息精准获取技术集成与应用”(2012BAH29B04)；陕西省耕地地力调查与质量评价项目。 |
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| 中文摘要: |
| [目的]通过建立秦岭山区县域耕地地力评价体系,为该区土地利用的合理规划,保持生态平衡,确保耕地资源的可持续发展利用提供重要理论依据。[方法]以陕西省商洛市商南县为研究区域,选取耕地基础设施、灌溉水平、土壤结构、类型、质地、地形地貌、全氮、速效钾、有机质、有效磷、海拔高度和坡度这12个参评因子,应用ArcMap10.2软件,对商南县土地利用现状图、土壤图、行政区划图进行叠加,确定评价单元,采用层次分析、专家经验等方法计算所选因子权重,对研究区耕地地力进行评价。[结果]商南县耕地总面积24848.26hm,1～5级耕地面积分别为2286.97、4666.79、8733.13、6320.22和2841.16hm。其中1、2级耕地主要集中分布在河谷川塬和浅山丘陵上,3、4级耕地多分布在浅山丘陵和中山地貌上,而5级地所处的坡度较大,土壤表层质地疏松,土体厚度、腐殖质层厚度均较低。[结论]灌溉能力、地貌类型、有机质、坡度为影响商南县耕地地力评价的主要因子,因此改善这些因素是提高本区耕地生产地力主要途径。 |
| 英文摘要: |
| [Objective]Based on GIS, the establishment of the evaluation system of cultivated land capacity in the mountainous areas of Southern Shaanxi Province provides important theoretical basis for the rational planning of land use, maintaining ecological balance and ensuring the sustainable development and utilization of cultivated land resources. [Method]Taking Shangnan County, Shangluo City, Shaanxi Province as the research area, 12 factors were selected including farmland infrastructure, irrigation level, soil structure, type, texture, topography, total nitrogen, available potassium, organic matter, available phosphorus, altitude and slope. The current land using map, soil map and administrative division map of Shangnan county are superposed to determine the evaluation unit by using ArcMap10.2 software. Adopting analytic hierarchy process, expert experience and other methods to calculate the weight of the selected factors, the cultivated land capacity of the study area was evaluated. [Result]The results showed that the total cultivated land area of Shangnan county is 24848.26hm, and the cultivated land area of grade 1～5 are 2286.97, 4666.79, 8733.13, 6320.22 and 2841.16hm, respectively. The cultivated land of grade 1 and grade 2 are mainly distributed in river valley, tableland and shallow hills, while the cultivated land of grade 3 and grade 4 are mainly distributed in shallow hills and middle mountains. The texture of soil surface of grade 5 is loose, and the thickness of soil mass and humus layer are relatively low because of the large slope of grade 5. [ Conclusion] Main factors affecting the evaluation of cultivated land productivity in Shangnan County, so improving these factors is the main way to improve the cultivated land productivity in this area. |
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