Effects of high-standard farmland construction on farmland quality and contribution of irrigation and drainage index

Abstract

为研究高标准农田建设对耕地质量等级的影响及灌排条件等各指标的贡献，以位于淮北平原的安徽省宿州市泗县为研究区域，基于ArcGIS、县域耕地资源管理信息系统等软件平台，运用特尔斐法进行相关指标权重及隶属度的确定，研究高标准农田建设对耕地质量等级的影响及灌排评价指标的贡献。结果表明，项目区内高标准农田建设前平均耕地质量等级为4.01，高标准农田建设后，平均耕地质量等级提升至2.93，耕地质量等级提升1.08，区域内低产田全部消除。高标准农田建成后，灌溉能力为充分满足和满足的耕地面积占比分别增加7.91、19.64个百分点，灌溉能力提升使耕地质量综合等级提升0.25；排水能力为充分满足和满足的耕地面积占比分别增加35.13、27.33个百分点，排水能力提升使耕地质量综合等级提升0.31。研究表明，高标准农田建设有效改善了灌排条件，使项目区内低产田全部消除，高产田面积占比明显增加，提升了耕地质量等级，其中灌排指标对耕地质量等级提升的作用最大，贡献率达51.85%。

Studying the effects of high-standard farmland construction on the cultivated land quality grades and the contribution of irrigation and drainage index to improve the construction of high-standard farmland and the quality of cultivated land is of great significance. Based on ArcGIS, and County Cultivated Land Resource Management Information System platforms, the impact of highstandard farmland construction on the quality grade of cultivated land and the contribution of irrigation and drainage indicators was studied using the Delphi method to determine the weights and degree of related indicators in Sixian County, Suzhou City, Anhui Province located in the Huaibei Plain, China. The results revealed that the grade of cultivated land quality in the studied area before high-standard farmland construction was 4.01. The grade of cultivated land quality after high-standard farmland construction raised to 2.93 with an upgrade by 1.08, and the farmlands with low production were eliminated. After high-standard farmland construction, the area of farmland of irrigation capacity with full satisfaction and satisfaction increased by 7.91 and 19.64 percent points, respectively, and the improvement of irrigation capacity increased the comprehensive grade of the cultivated land quality by 0.25. The drainage capacity with full satisfaction and satisfaction cultivated land was increased by 35.13 and 27.33 percent points, respectively. The improvement of drainage capacity increased the comprehensive quality grade of cultivated land by 0.31. This study indicates that the construction of high-standard farmland effectively improved the irrigation and drainage conditions, and eliminated all the low yield fields in the studied area, thereby increasing the proportion of high-yield farmland significantly through improving the quality grade of cultivated land, in which the irrigation and drainage index exerted the greatest impact on the improvement of cultivated land quality grade with 51.85% of the contribution.