基于高标准农田建设的耕地地力评定——以石门县新增粮食生产能力田间工程建设项目为例

目的]以湖南省石门县新增粮食生产能力田间工程建设项目为例，对项目区建设前和建设后的耕地地力进行综合评定，方法]选取地形部位、排水能力、灌溉能力、障碍因素、剖面构型、耕层厚度、耕层质地、有机质、有效磷、缓效钾共10个评定因子构建耕地地力评定指标体系和层次模型，采用层次分析法和特尔斐法确定评定因子隶属度和综合权重，运用指数法计算项目区建设前、后的耕地地力指数及其变化值，结果]确定耕地地力等级，测算出耕地综合生产能力提升量为1860 kg/ (hm2?a)，结论]为高标准基本农田建设和耕地地力提升提供可行性建议。

Evaluation of Cultivated land Fertility Based on high-standard Farmland Construction: a case study of the Increase Grain Production Capacity Field Project in Shimen County

Objective]By taking the newly increased grain production capacity field project in Shimen County of Hunan Province as an example, the farmland fertility of the pre-construction and post-construction in the construction area conducts the integrated evaluation. Method]A total of 10 evaluation factors including topographic position, drainage capacity, irrigation capacity, obstacle factors, profile configuration, topsoil thickness, topsoil texture, organic matter, available phosphorus and slow-release K are selected to construct the farmland fertility evaluation index system and the hierarchical model. The Analytic Hierarchy Method and Delphi Method are used to confirm the membership and the comprehensive weight of the evaluation factors. Also, the Index Method is used to calculate the farmland fertility index and its variation in the construction area before and after construction, Result]determine the farmland fertility grade and calculate the integrated productivity capacity of project area was increased by 1860 kg/ (hm2?a), Conclusion]to provid feasible suggestion on constructing high-standard basic farmland and lifting the farmland fertility.