Analysis and Application of Cultivated Land Quality Monitoring in Coastal Areas ——A Case Study of Mawei District of Fuzhou City

With the combination of field investigation and expert consultation and demonstration, and with the help of remote sensing and Arcgis software technology, the gradation type of cultivated land quality grade was delineated, and its driving factors and potential development trend were analyzed, and the gradient of cultivated land quality in Mawei District of Fuzhou city was monitored. The results showed that the cultivated land in Mawei District of Fuzhou City had a gradual changing trend of declining fertility, increasing fertility and gradually salinization. According to the principle of demarcation of monitoring area, 6 gradual monitoring areas with an area of 695.71 hm² were determined in Mawei District. According to the typical dominant analysis of driving factors and monitoring indicators, 1 586 monitoring units were confirmed with 30 fixed monitoring units and 30 layout sampling points.