Different irrigation periods and K fertilizer effects on water use efficiency of rice Oryza sativa L. mishkhab 1 cultivar

الملخص EN

A field experiment was carried out at the Rice Research Station at Al-Mishkhab - Najaf province - Iraq country during 2019 season to investigate effect of irrigation periods and K fertilizer on Water-Use Efficiency (WUE) of rice mishkhab1 cultivar using Randomized Completely Block Design (RCBD) in a factorial arrangement with three replicates, Irrigation periods were the first factor namely, continuous flooding Irrigation (I1) as control, every 5 days Irrigation (I2), every 7 days Irrigation (I3) and every 10 days Irrigation (I4) and the second factor was K fertilizer levels namely, 30 Kg Donum-1(K1) as control 40 Kg K D-1, (K2), 50 Kg D-1 (K3) and 60 Kg D-1 (K4), means were compered using Least Significant Difference test (L.

S.

D) among treatments at 0.

05 probability level and the results shows the following: The (I2) treatment was significant superior on traits of (WUE) by 270 %, 17.

1 % biological yield, 32.

6% grain yield and for (WUE) by 86% as comparison with control (I1)