Evaluation of yield and yield components of Quinoa under different irrigation water managements

In order to investigate the effect of different water managements on yield and yield components of Quinoa (c.v. Titicaca), a factorial experiment based on a complete randomized block design was conducted with three replications at Neyshabur city in 2018. Five irrigation water management (furrow irrigation (SI), low-pressure drip irrigation by Tape in the middle of furrow ridge (TI), low-pressure drip irrigation by Tape on both sides of the furrow ridge in alternate every other furrow (ATI), low-pressure drip irrigation by Tape at 75% full irrigation on both sides of the furrow ridge in alternate every other furrow (0.75 ATI), low-pressure drip irrigation by Tape in the middle of furrow ridge at 75% full irrigation (0.75 TI) were employed. The results of comparing the averages showed that the highest amounts of Quinoa grain yield and 1000 kernel weights were 1805 Kg ha-1 and 2.35 gr, respectively, for SI while the lowest ones were 1352.7 Kg ha-1 and 1.69 gr, respectively, for 0.75 TI. The TI, ATI, 0.75 ATI, and 0.75 TI treatments lead to a decrease in the Quinoa grain yield of 12.4, 11.6, 18.7, and 25.1%, respectively, as compared to the SI treatment. The best production function of yield-irrigation water was a linear function (Y=1014 +0.13 I).