سید امیرحسین موسوی_اصلان اگدرنژاد و عبدالعلی گیلانی

So as to simulate rice yield and water use efficiency using AquaCrop and SWAP models, a research study was conducted at Khuzistan Agricultrual Research Station. In this study, three types of cultivation (D1: transplanting, D2: current directs seeding consorted seeding, and D3: dry bed seeding) and rice cultivars (V1: Red-Anbori, V2: Champa, V3: Danial) were considered. Results of MBE (0.36 ton.ha-1), RMSE (0.1.07 ton.ha-1) and NRMSE (0.14 ton.ha-1) showed that AquaCrop had good accuracy for simulation of rice yield. Mentioned statistical criteria for yield simulated by SWAP were 0.54 ton.ha-1, 1.09 ton.ha-1 and 0.15, respectively, which showed a good accuracy for this model. MBE, RMSE and NRMSE values for water use efficiency calculated by AquaCrop were -0.11 kg.m-3, 0.40 kg.m-3 and 0.15, respectively, and by AquaCrop were -0.10 kg.m-3, 0.40 kg.m-3 and 0.15, respectively. Average difference between observed and simulated yield by AquaCrop and SWAP were 0.64 ton.ha-1 and 0.67 ton.ha-1, respectively. Those values for water use efficiency were 0.02 kg.m-3 and 0.025 kg.m-3, respectively. The results revealed that both AquaCrop and SWAP had acceptable accuracy for simulation of different rice cultivars yield and water use efficiency under various cultivation types, however, AquaCrop had a bit better accuracy.