Spatial and Temporal Characteristics and Decoupling Relationship of Non-point Source Pollution of Cultivated Land in Jiangxi Province
To provide scientific reference for the management of arable land surface source pollution in Jiangxi province,the spatial and temporal characteristics of arable land surface source pollution in terms of fertilizer application intensity and livestock,poultry,feces and urine emission intensity from 2010 to 2020 were analyzed with 84 counties(districts)in Jiangxi province as the research object,and the decoupling relationship between agricultural production(grain production,meat production)and arable land surface source pollution(total fertilizer application,total livestock,poultry,feces and urine emission)was explored.The results showed that temporally,the surface source pollution situation of arable land in Jiangxi province was reduced from 2010 to 2020,and the total amount of fertilizer application and the total amount of livestock feces and urine emission both showed a trend of increase followed by decrease,and both of them reached the maximum value in 2015,which was 143.58×104 t and 8 474.26×104 t,respectively,and then continued to decline;spatially,arable land surface source pollution in Jiangxi province showed a distinctive spatial variability,the areas with higher fertilizer application intensity are mainly distributed in the south and central,and the places with higher livestock manure and urine emission intensity are concentrated in the south,west,and central,and showed an aggregation trend;The weak decoupling relationship between grain pro-duction and fertilizer application in Jiangxi province has occured many times,with a tendency to de-veloped from weak decoupling to strong decoupling;the meat production and the animal and poultry manure emission.The total amount of meat production and livestock and poultry manure emissions were mostly weakly decoupled,with a tendency to moved from weak decoupling to weak negative de-coupling,indicated that the task of preventing and controlling surface pollution from livestock and poultry farming in Jiangxi province is still very difficult.
croplandsurface source pollutionagricultural productiondecoupling relationshipJiangxi province
万方数据
维普
