Nitrogen Loss Via Runoff and Leaching from Paddy Fields with the Proportion of Controlled-Release Urea and Conventional Urea Rates under Alternate Wetting and Drying Irrigation

Alternate wetting and drying irrigation (AWD) can reduce non-point source pollution from paddy fields by mitigating field water depth. However, the influence of compounding modes of polymer-coated urea (PCU) and conventional urea (CU) on nitrogen (N) loss via runoff and leaching from paddy fields under AWD conditions remains unclear. To address this question, in this study, a 2-year field experiment was set up with three N management treatments: (a) 100