淮北平原地区耕地质量监测评价——以正阳县为例

Monitoring and Evaluation of Cultivated Land Quality in Huaibei Plain——A Case Study of Zhengyang County

运用Kriging插值法、对比分析法,将耕地地力调查数据和耕地质量年度更新评价数据细化,确定正阳县耕地质量渐变类型,根据渐变类型和耕地质量等别,选取监测单元进行耕地质量监测评价。结果表明:正阳县耕地质量渐变类型为肥力提升型和逐步干旱型,影响耕地质量主导因素为土壤有机质和灌溉保证率;全县共布设耕地质量监测单元25个,其中固定监测单元4个,随机监测单元21个;全县肥力提升型耕地国家利用等指数有所增加,逐步干旱型耕地国家利用等指数有所下降,但等别均变化不大,全县耕地质量基本稳定。

Using Kriging interpolation method and comparative analysis method,the data of cultivated land fertility and the annual updated evaluation data of cultivated land quality were refined to determine the type of farmland quality gradient in Zhengyang County. Based on gradient type and cultivated land quality,the monitoring unit was selected to carry out farmland quality monitoring and evaluation.The results showed that the grades of cultivated land quality in Zhengyang County were improved by fertility and gradual drought. The main factors affecting the quality of cultivated land were soil organic matter and irrigation guarantee rate. There were 25 cultivated land quality monitoring units,including 4 fixed monitoring units and 21 random monitoring units; the national use index of fertility-enhanced arable land in the county has increased,and the index of gradual national use of arid arable land has declined. However,the average level of arable land in the county was basically stable.