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Evapotranspiration of a Hungarian rice variety, ‘SZV Tünde’ in large weighing lysimeter

2022; Volume: 9; Issue: 2 Linguagem: Inglês

10.18380/szie.colum.2022.9.2.5

2064-9479

Mihály Jancsó, Árpád Székely, Tímea Szalóki, Csaba Lantos, Noémi Júlia Valkovszki, Csaba Bozán, János Pauk,

Water-Energy-Food Nexus Studies

Aerobic rice production is an alternative growing method to reduce water consumption of rice and thus increase the water productivity of the system without a significant reduction of yield and quality. Evapotranspiration (ETc) of a Hungarian rice variety, ‘SZV Tünde’ under aerobic conditions was measured in large weighing lysimeter during the growing season in 2020. In our experiment, 506.7 g/m2 grain yield and a total above-ground biomass of 1140.4 g/m2 were produced with the application of 315.6 mm of irrigation. Water use-efficiency (WUE) based on the water input and the grain yield was 0.65 g/L. Total ETc for the whole season was measured as 648.3 mm. However, ETc values were ranged 2.04-3.86 mm/day, 3.57-7.90 mm/day and 0.90-4.26 mm/day at the initial, mid and end stages, respectively. Crop coefficients for the different periods of the season were calculated as Kcini=0.82, Kcmid=1.40 and Kcend=0.77. Negative effects of drought can seriously damage rice crop; therefore irrigation scheduling has significant role in successful aerobic rice cultivation. Reliable estimation of evapotranspiration rate in different crop developmental stages can promote this goal.