Research on County-level Cultivated Land Classification Update Methods Based on the Fuzzy Matter-element and Kriging Interpolation Method
选取14个化学、物理和管理指标构建耕地质量动态监测体系，用模糊灰色物元法和克里金插值对公安县耕地等级更新进行实证，发现整体质量轻微下降，但该方法能平衡更新的时效性、准确性和经济性。
According to the characteristics of changes of cultivated land and the cycle of index change,author picks up 14 indexes considering the chemical factor,physical factor and management factor,using these indexes to construct the farmland quality dynamic monitoring indicator system.Then,the author use fuzzy grey matter-element method and Kriging interpolation to make an empirical study on the cultivated land grade update in Gongan county.Research conclusions: ①The overall quality of cultivated land in Gongan County is in slight decline which mainly concentrated in the eastern part of the county and near the lakes.The quality of cultivated land in land treatment and local high-yielding farmland has partially promoted.②Fuzzy grey matter-element analysis combined with Kriging interpolation could make a better balance of contradictions of cultivated land quality dynamic update between the timeliness,accuracy and affordability.