Grade Evaluation of Cultivated Land Quality in Xifeng District of Qingyang
In order to scientifically protect and improve the quality of cultivated land,grasp the current status of cultivated land quality levels,and clarify the distribution status of medium and low yield fields.Based on 44 monitoring points of cultivated land quality survey in Xifeng District of Qingyang City in 2021,16 evaluation index data were collected in this study from five levels such as topsoil physical and chemical properties,profile configuration,soil nutrients,and field management at each monitoring point.Using spatial interpolation and the point-to-surface method to assign values to the entire region's cultivated land units,the comprehensive index method,Delphi method,and Analytic Hierarchy Process model were employed to evaluate the grading of cultivated land.The results indicated that,the cultivated land in the whole region was divided into five grades,namely,fourth grade,fifth grade,sixth grade,seventh grade and eighth grade.The total area of cultivated land participating in the evaluation in the entire region was 25 881.78 ha of which the area of fourth grade's land was 134.09 ha,accounting for 0.52%of the total cultivated land area.The area of fifth grade's land was 1 100.13 ha,accounting for 4.25%of the total cultivated land area.The area of sixth grade's land was 6 935.8 ha,accounting for 26.80%of the total cultivated land area.The area of seventh grade's land was 9 901.18 ha,accounting for 38.26%of the total cultivated land area.The area of eighth grade's land was 7 810.58 ha,accounting for 30.18%of the total cultivated land area.No distribution of first grade,second grade,or third grade land was found in this study.It can be concluded that the quality of cultivated land in Xifeng District is relatively low,and much work remains to be done in terms of protecting and improving land quality.
Xifeng DistrictCultivated land qualityGrade evaluationQuality improvement
国家科技期刊平台
NSTL
万方数据
