面向土地整治的耕地质量评价优化

Optimization of cultivated land quality evaluation for land consolidation

探讨面向土地整治的耕地质量评价方法和指标体系,进行土地整治成效分析,是当前土地整治的现实需求.借鉴已有耕地质量评价相关成果,从地学特征、土壤特性、耕作条件、健康状况和生物特性等五个方面改进评价方法和指标体系.以河南省温县土地整治工程进行实证研究,采用综合算法,其中耕地地形特征、土壤性状和耕作条件指数采用加权求和法,健康状况系数和生物特性系数利用“1+X”模型,将耕地质量划分为5个等级,评价项目区土地整治前和整治后耕地质量指数的变化.结果表明:相较于《农用地质量分等规程》,新的耕地质量评价体系应用于土地整治工程实施前后耕地质量评价具有一定的优势,可以更精确地分析土地整治成效.研究结果可为面向土地整治的耕地质量评价工作提供一定参考.

It is urgently needed to explore methodology and indicator system of cultivated land quality and thus to meet the needs of land quality change assessment in the context of land consolidation. Based on current achievements in the evaluation of cultivated land quality, the evaluation methods and indicator systems were improved from five aspects, including geomorphologic characteristics, soil properties, farming conditions, health status, and biological characteristics. A case study was carried out for the land improvement project of Wenxian County, Henan Province, using an integrated algorithm. In this study, the indicators involving geomorphologic characteristics, soil properties and farming conditions of cultivated land were weighted and summed, and the coefficients of health status and biological characteristics were obtained using the “1+X” model. The changes of cultivated land quality indicators before and after land consolidation were evaluated, with the cultivated land quality being divided into five levels. Results showed that the proposed cultivated land quality evaluation system can more accurately examine the effects of land consolidation on cultivated land quality before and after the implementation of the land improvement project. The new cultivated land quality evaluation system is superior to the Cultivated Land Quality Classification Regulations of China. Our results provide a reference for the evaluation of cultivated land quality for land consolidation.