华北平原县域耕地质量综合评价

Farmland Comprehensive Quality Evaluation and Analysis of County Areas in the North China Plain

基于采样、观测和统计数据,从耕地自然质量、经济质量和生态质量属性视角构建了耕地质量评价指标体系,运用隶属度函数、主成分分析、栅格采样和综合指数模型,对华北平原禹城市耕地质量进行了综合评价与分析.评价结果表明:2009年禹城市耕地自然质量、生态质量和经济质量分别以一、二、三等,二、三、四等和一、三、五等为主,且分别呈现耕地质量等级由中部、南部,中北、中南部和东部向周边区域降低的空间分异格局,区域耕地自然、生态和经济条件差异与耕地质量格局分异密切相关.

Taking Yucheng County in the North China Plain as an example,a comprehensive evaluation index system was constructed in terms of the farmland natural,economic and ecological quality based on the data from sampling,observation and statistics.The methods of subordinate functions,principal component analysis and composite index evaluation model were selected to perform a comprehensive evaluation on farmland quality.The evaluation results revealed that farmland quality in Yucheng County in 2009 could be divided into five grades,farmland natural,ecological and economic quality were dominated by first,second,third grades;second,third,fourth grades and first,third,fifth grades.Farmland natural quality grades had an obvious decreasing distribution from the center,south to surrounding region,while the northern-center and southern-center to surrounding region for ecological quality and the east to surrounding region for economic quality,which were closely related with the regional natural,ecological and economic factors.