Study on Ecological Safety Monitoring Practice of County Cultivated Land:A Case Study from Huanghua City, Hebei Province of China

Degradation of ecological environment and health functions of cultivated land can cause great threats to food safety. In order to effectively promote ecological safety monitoring and protection practices of county cultivated land, factors influencing cultivated land ecological environment in Huanghua City (Hebei Province) were analysed. An ecological security monitoring index system for current cultivated land utilization in China was constructed. A database was constructed, and a safety evaluation was carried out based on the agricultural land classification platform by using the single index evaluation method. Evaluation results overlapped in terms of the spatial consistency between management technologies and monitoring results. Cultivated lands were divided according to safety monitoring results. Corresponding management and monitoring measures were proposed. Results demonstrate the excessive application of chemical fertilizer is the leading threat to cultivated land ecological environment in Huanghua City. Arsenic and Ni content have low safety levels in a part of the region. High attention can be paid to their real-time monitoring. Moreover, cultivated land shortage, low unit yield, and small reserves all intensify pressure on cultivated land ecological environment in Huanghua City. Insufficient soil fertility and freshwater shortage are caused by poor physical and chemical properties of soil, and because of this cultivated land ecological environment in Huanghua City has no material basis. The study provides references to set up ecological safety monitoring system for the county cultivated land and practices.