摘要
Abstract
In order to provide a reasonable theoretical basis for regional environmental development and fertilizer pollution control,based on the statistical data of 1985-2021,the temporal and spatial changes of chemical fertilizer application in Jiangxi Province were analyzed.The results showed that in 1985-2021,the chemical fertilizer application rate and application intensity in Jiangxi province showed a trend of first increasing and then decreasing,and both reached a peak in 2015.The ratio of nitrogen,phosphorus and potassium fertilization increased from 1∶0.30∶0.26 in 1985 to 1∶0.69∶0.71 in 2021.The environmental risk index of fertilizer application showed an upward trend,and the risk level increased from the"safe"level in 1985 to the"low risk"level in 2021.There were significant spatial differences in the environmental risk index of chemical fertilizer appli-cation in Jiangxi province,among which the chemical fertilizer risk index in Nanchang city and Pingxiang city was larger,which was the priority control area for chemical fertilizer pollution control.It is suggested that Jiangxi province should reasonably adjust the application structure of nitrogen,phosphorus and potassium fertilizers in maintaining the existing fertilizer application intensity,and that all prefecture-level cities should maintain 1∶0.5∶0.5 of nitrogen,phosphorus and potassium fertilizers in the fertilization structure,and at the same time do a good job in pollution prevention and control measures.关键词
化肥施用强度/环境风险/时空分异/江西省Key words
fertilizer application intensity/environmental risks/spatiotemporal differentiation/Jian-gxi province分类
资源环境
