临泽县耕地质量评价

Quality Evaluation of Cultivated Lands in Linze County

为了全面、精准地评估甘肃省临泽县耕地质量的各项指标水平,提升耕地质量检测与保护管理水平,依托ArcGIS技术,采用层次分析、空间分析、综合指数和模糊数学等方法,对临泽县的耕地质量进行了等级评价。结果显示,临泽县的耕地质量等级可划分为6个等级,即从一等至六等,各等级所占的比例分别为16.13%、19.39%、54.99%、3.57%、0、5.91%,平均等级为2.70等。其中,一等到三等耕地占90.51%,表明临泽县的耕地质量总体状况良好。耕地土壤有机质含量平均为18.27 g/kg,主要集中在10.00~20.00 g/kg,多属较低等水平;全氮含量平均为0.87 g/kg,主要集中在≤1.00 g/kg和1.00~1.25 g/kg,多属低等水平;有效磷含量平均为25.41 mg/kg,主要集中在25.00~40.00 mg/kg,多属较高水平;速效钾含量平均为180.04 mg/kg,主要集中在150.00~200.00 mg/kg,多属中低等水平。

In order to comprehensively and accurately evaluate the index level of cultivated land quality in Linze County,Gansu Province,and further improve the level of detection and protection management of cultivated land quality,techniques such as hierarchical analysis,spatial analysis,composite indices,and fuzzy mathematics were utilized,leveraging ArcGIS technology,to evaluate the levels of cultivated land quality in Linze County.The evaluation categorized the farmland quality into 6 grades,from first to sixth,with respective proportions of 16.13%,19.39%,54.99%,3.57%,0,and 5.91%,with an average grade of 2.70.Notably,first to third grade lands comprise 90.51%of the farmland,indicating an overall good quality of farmland in Linze County.The average organic matter content in the farmland soil is 18.27 g/kg,primarily ranging between 10.00 to 20.00 g/kg,which is on the lower side,the average total nitrogen content is 0.87 g/kg,mainly concentrated at≤1.00 g/kg and 1.00 to 1.25 g/kg,indicating a lower level,the average available phosphorus content is 25.41 mg/kg,primarily found between 25.00 to 40.00 mg/kg,which is relatively high;and the average content of available potassium is 180.04 mg/kg,mainly concentrated between 150.00 to 200.00 mg/kg,which is considered mid to low level.