Comparison of Evapotranspiration Partitioning and Dual Crop Coefficients of Direct-Seeded and Transplanted Rice in the Poyang Lake Basin, China

Direct-seeded rice (DSR) has received much attention because of its advantages in having low labor costs compared to the traditional transplanted (TPR). Investigating differences evapotranspiration (ET) partitioning and crop coefficients (Kc) between DSR TPR is essential understanding how agricultural water demand affected by rotation. In this study, fluxes two-year (2017–2018) growing seasons were collected from a pair eddy covariance (EC) towers for Poyang Lake Basin, Southern China. This study aims compare seasonal characteristics ET components (evaporation, E, transpiration, T) dual (basal coefficient, Ks·Kcb, soil/water Ke) with those TPR. The values 2017 2018 374 mm 436 DSR, respectively, 309 342 T/ET 0.40 0.46 0.49 0.52 TPR, indicating that higher can be mostly attributed E. had overall Kc than free evaporation during initial stage plant density. Our results enrich dataset have great implications sustainable irrigation Basin future.