Spatiotemporal Distribution Characteristics of Pesticides and Fertilizers Use in Hunan Province
The spatiotemporal variation in agricultural pesticides and fertilizers use in Hunan Province was ana-lyzed by using historical statistical data.The results show that the fertilizer application rate per unit area of crops in Hunan Province was more than 225 kg/hm2 warning line from 2010 to 2021.Nitrogen fertilizer and compound fertilizer were the main application types,accounting for 32％～47％and 25％～44％of the total fertilizer appli-cation,respectively.In 2021,the pesticide application amount of 91,100 t and the application intensity of 36.45 kg/hm2 in the province were reduced by 26.71％and 26.56％compared with 124,300 t and 49.63 kg/hm2 in 2013,respectively.In two typical years,the intensity of fertilizer and pesticide application in most areas of Hunan Province were high,indicating moderate or severe pollution degree,and the spatial distribution changed little.The spatiotemporal distribution characteristics of agricultural pesticides and fertilizers use and the evaluation of pollu-tion degree in Hunan Province provide scientific basis for the comprehensive prevention and control of agricultur-al non-point source pollution.
agricultural non-point source pollutionspatiotemporal distributionpollution evaluationHunan Province
NETL
NSTL
万方数据
