基于GIS的惠农区耕地地力等级评价  

Soil Fertility of Cultivated Land in Huinong District Based on GIS

作　　者：田瑞[1] 张学俭[1,2] 

机构地区：[1]宁夏大学西部生态研究中心,宁夏银川750021 [2]宁夏农林科学院农业科技信息研究所,宁夏银川750002

出　　处：《贵州农业科学》2013年第2期184-187,共4页Guizhou Agricultural Sciences

基　　金：国家科技支撑项目"黄河河套地区盐碱地改良及脱硫废弃物资源化利用关键技术研究与示范"(2007BAQ00021)

摘　　要：为了对耕地资源的科学管理和可持续利用提供依据,以宁夏惠农区耕地地力调查分析数据为基础,在GIS支持下,利用土地利用现状图、土壤图等叠加划分确定评价单元,采取专家打分和特尔斐法确定有机质含量、有效磷含量、速效钾含量、盐渍化程度、障碍层类型、剖面构型、耕层质地、成土母质8个影响因子的隶属函数,运用层次分析法确定权重,模糊数学方法对耕地地力进行综合评价,并对其空间分布进行了分析。结果表明,惠农区1.92万hm2耕地中,一至六等地分别占耕地的8.8%、22.7%、30.7%、24.8%、8.7%、4.4%。研究结果可直接应用于该区农业生产。Eight membership functions of organic matter content, effective phosphorus content, rapidly available potassium content, degree of salinity, barrier layer type, profile pattern, topsoil texture and parent material confirmed by experts and Delphi method based on the data of cultivated land soil fertility and GIS in Huinong district, Ningxia were analyzed by AHP and fuzzy mathematics method to evaluate the soil fertility comprehensively and provide the basis for scientific management and sustainable utilization of cultivated land resources. The results showed that the area of the cultivated lands with 1, 2, 3, 4, 5 and 6 fertility occupied 8.8%, 22.7%, 30.7%, 24.8%, 8.7% and 4.4% in 19 200 hm^2 cultivated land respectively, which can be directly used in agricultural production in Huinong district, Ningxia.

关 键 词：GIS 耕地地力评价 层次分析 模糊评价 

分 类 号：S58[农业科学—作物学]