CRITICAL PROCESSES AND MAJOR FACTORS THAT DRIVE NITROGEN TRANSPORT FROM FARMLAND TO SURFACE WATER BODIES

作者：Wenchao LI, Wen Xu, Gaofei Yin, Xulin ZHANG, Zihan ZHANG, Bin Xi, Qiuliang Lei, Limei Zhai, Qiang Zhang, Linzhang Yang, Hongbin LIU · 发表于：Frontiers of Agricultural Science and Engineering · 年份：2023 · DOI：10.15302/j-fase-2023518 · 被引用次数：9 · 研究领域：Water-Energy-Food Nexus Studies

● This study clarified the critical processes and major factors that nitrogen transport from farm fields to surface water bodies. ● Soil storage, exogenous inputs and meteorological hydrology were found to influence nitrogen loss from farmland. ● Hydrology, biogeochemistry and nitrogen inputs were found to influence the transformation of nitrogen in the ditches and rivers. Agricultural non-point source pollution is increasingly an important issue affecting surface water quality. Currently, the majority of the studies on nitrogen loss have focused on the agricultural field scale, however, the response of surface water quality at the watershed scale into the nitrogen loss at the field scale is poorly understood. The present study systematically reviewed the critical processes and major factors that nitrogen transport from farm fields to surface water bodies. The critical processes of farmland nitrogen entering surface water bodies involve the processes of nitrogen transport from farmland to ditches and the transformation processes of nitrogen during migration in ditches/rivers. Nitrogen transport from farmland to ditches is one of the prerequisites and critical processes for farmland nitrogen transport to surface water bodies. The transformation of nitrogen forms in ditches/rivers is an intermediate process in the migration of nitrogen from farmland to surface water bodies. Nitrogen loss from farmland is related to soil storage and exogenous inputs. Therefore, nitrogen input m...