XIAO Lian-gang,ZHANG Jian-ming.Assessment of Soil Comprehensive Nutrients Status in Irrigation District of Yellow River Based on GIS[J].Research of Soil and Water Conservation,2010,17(05):273-276.
基于GIS宁夏引黄灌区农地土壤综合养分状况评价
- Title:
- Assessment of Soil Comprehensive Nutrients Status in Irrigation District of Yellow River Based on GIS
- Keywords:
- soil nutrient; comprehensive evaluation; GIS
- 分类号:
- S158
- 摘要:
- 精准农业是未来农业的发展方向，查清田块内部的土壤性状与生产力空间变异，是精准农业的基础研究内容。以宁夏引黄灌区灵武农场的农地为例，运用ArcGIS进行空间数据采集、处理、分析，并采用主成分分析法确定评价因素的权重值，运用模糊数学方法建立各个评价因子对土壤养分状况的隶属函数，最后计算了综合养分状况的评分并利用指数和法得到最终的土壤养分状况评价值，根据综合评价值划分土壤养分状况等级，利用ArcGIS软件进行克里格插值得到最终土壤综合养分状况评价图。从具体评价结果可以看出，土壤综合养分状况由西北向东南降低的趋势明显。西角北角为两个极端高值区域，东角南角为两个极端低值区域。
- Abstract:
- The precision agriculture is the development direction of the future agriculture and investigating the soil properties and the spatial variability of the productivity is the basic research content of the precision agriculture. In this paper, soil fertility evaluation was conducted for the farmlands in Lingwu farm which is located in irrigation district of Yellow river based on the techniques of Geographic Information System (GIS). ArcGIS software was adopted for spatial data collection, processing and analysis. PCA was applied to judge the weight of each evaluation factor, based on the method of fuzzy mathematics, membership functions were set up to calculate the value of all evaluation factors. Soil comprehensive nutrient level was graded according to the comprehensive assessment values. The evaluation results were mapped according to Kriging method using ArcGIS software. The maps show that the soil comprehensive fertility decreases obviously from north and west corners which are the two extreme high value area to south east corner which are the extreme low value area.
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备注/Memo
收稿日期:2010-7-20;改回日期:2006-1-13。
基金项目:国家青年自然科学基金（40901021）
作者简介:肖连刚（1985- ），男，硕士，山东济南人，主要研究方向：土壤学。E-mail：liangang1985@163.com
通讯作者:祁有祥（1980- ），男，硕士，主要研究方向：水土保持与荒漠化防治。