关键词: 耕地, 面源污染, 时空特征, 脱钩效应, 江苏省沿江地区

Abstract: To provide a reference basis for the prevention and control of non-point source pollution of cultivated land in the area along the Yangtze River in Jiangsu Province and the green development of agriculture in the Yangtze River basin, based on the city scale, the spatio-temporal evolution characteristics of non-point source pollution of cultivated land in the area along the Yangtze River in Jiangsu Province from 2006 to 2020 were revealed, and the Tapio decoupling model was used to further explore the decoupling relationship between non-point source pollution of cultivated land and agricultural economic growth. The results showed that the non-point source pollution of cultivated land in the area along the Yangtze River in Jiangsu Province had significantly improved, and the spatial differences in pesticide non-point source pollution were more significant compared to fertilizer non-point source pollution. The overall output value per unit area of the planting industry was on the rise, with significant spatial differences. The decoupling relationship between agricultural production and non-point source pollution of cultivated land showed a phased feature, and the strong decoupling aggregation area showed displacement. In the future, the reduction and efficiency increase of chemical fertilizers and pesticides should be promoted, the monitoring and evaluation of cultivated land quality should be strengthened, soil conservation mechanisms should be established, and the construction of high standard farmland throughout the region should be promoted, to achieve strong decoupling between agricultural production and non-point source pollution of cultivated land.

Key words: cultivated land, non-point source pollution, spatio-temporal characteristics, decoupling effects, the area along the Yangtze River in Jiangsu Province