自然资源学报 ›› 2011, Vol. 26 ›› Issue (3): 477-485.doi: 10.11849/zrzyxb.2011.03.014

• 资源评价 • 上一篇    下一篇

基于GIS的盐渍土改良区耕地土壤适宜性评价

杨奇勇, 杨劲松, 李晓明, 李冬顺   

  1. 中国科学院 南京土壤研究所,南京 210008
  • 收稿日期:2010-07-10 修回日期:2010-11-14 出版日期:2011-03-20 发布日期:2011-03-20
  • 通讯作者: E-mail:jsyang@issas.ac.cn E-mail:jsyang@issas.ac.cn
  • 作者简介:杨奇勇(1976- ),男,湖南邵阳人,博士生,主要从事土壤和水资源利用与管理及GIS应用研究。E-mail:yangqiyong0739@163.com
  • 基金资助:

    公益性行业(农业)科研专项经费项目(200903001);中国科学院知识创新工程重大项目(KSCX1-YW-09)。

GIS-based Soil Suitability Evaluation of Cultivated Land in Saline Soil Improvement District

YANG Qi-yong, YANG Jing-song, LI Xiao-ming, LI Dong-shun   

  1. Institute of Soil Science, CAS, Nanjing 210008, China
  • Received:2010-07-10 Revised:2010-11-14 Online:2011-03-20 Published:2011-03-20

摘要: 论文以山东禹城市为例, 进行了盐渍土改良区耕地土壤适宜性评价研究。采用灰色关联分析法与Delphi法结合筛选参评因素,用层次分析法(AHP) 确定其权重,建立了土壤适宜性综合评价模型。通过比较空间插值方法后,采用反距离加权(IDW)空间插值技术,获取了研究区土壤适宜性等级空间分布图。结果显示,禹城市耕地土壤适宜性总体状况良好,Ⅰ、Ⅱ等级面积占27.24%;Ⅲ、Ⅳ等级面积占45.48%,Ⅴ、Ⅵ等级面积占27.28%。耕地土壤适宜性等级分布受到地形地貌的影响,由地势较高的河滩高地向地势较低的洼地过渡,土壤适宜性变差;土壤适宜性等级分布同时受引黄灌溉的影响,在引黄干渠的低洼处,土壤适宜性差。该研究探索了盐渍土改良区耕地土壤适宜性的评价技术方法,对盐渍土改良区耕地资源的持续利用和土壤改良有积极意义。

关键词: GIS, 土壤适宜性, 盐渍土改良, 禹城市

Abstract: In this paper we present a case study of Yucheng City, which is a representative district of salt-affected soil under amelioration in northwest Shandong Province. Using Delphi approach and grey correlative degree method, the evaluation factors were chosen. The comprehensive evaluation model of soil suitability was established when weights of these factors were determined by AHP method. The geospatial techniques included Inverse Distance Weighting (IDW), Radial Basis Function (RBF) and Ordinary Kriging (OK). On the basis of Root-Mean-Squared-Error, the IDW was found to be the most successful one, and it was used to estimate the Index of Soil Suitability (ISS) of sampling sites. The contour map of the soil suitability was drawn after determining the ranks of ISS by scatter diagram. The results showed that the soil suitability of cultivated land in Yucheng City is good in general. The area of the first and the second grades is 27.24% of the total area. The area of the third and the fourth grades is 45.48%, and that of the fifth and the sixth grades is 27.28% of the total area. Distribution of cultivated land soil suitability grades was affected by topography when the terrain varies from the highlands to the low-lying depressions, and Yellow River irrigation has an effect on soil suitability grades. This study explored the technical methods of the soil suitability evaluation in the saline soil improvement district, and this study contributes significantly to the improvement of saline soil cultivated land resources, sustainable use and soil quality improvement.

Key words: GIS, soil suitability, salt-affected soil under amelioration, Yucheng City

中图分类号: 

  • S159