Crop Water Productivity and Crop Coefficients of Lentil (Lens Culinaris M.) Under Different Irrigation Regimes

Maie Kabbashi Alla Jabow, Zayed Babiker Mahgoub

Abstract


This study was conducted for two consecutive winter seasons
(2014/15 and 2015/16) at Hudeiba Research Station Farm to determine the
effects of deficit irrigation imposed at different developmental stages and
throughout the growing season on water use and water productivity of lentil
(L. culinaris M.) and to derive the crop coefficient. Lentil Aribo cultivar was
grown under six irrigation treatments in which one-irrigation was skipped at
some of the growth stages, i.e. vegetative (W3), flowering (W4), pod setting (W5) and ripening stage (W6) and irrigation without skipping with intervals of 10 days (full irrigation) (W1) and irrigation every 15 days (W2)
(moderate water stress throughout the growing season). The experimental
design was randomized complete block design with three replications. The
average estimated values of crop coefficients during the initial, mid -season
and late -season stages were 0.28, 1.06 and 0.48, respectively. The results
revealed that the highest grain yield was recorded in full irrigation (1003 kg
ha-1) and significantly (p < 0.001) decreased by 13, 28 and 31% when deficit irrigation was applied throughout the growing season, at flowering and at pod setting stages, respectively. The highest and lowest values of crop water productivity resulted from deficit irrigation imposed at vegetative stage and at flowering stages, respectively. The most sensitive stages of lentil to water deficit were the flowering and pod setting. Therefore, under water shortage

Keywords


Lens culinaris M.; deficit irrigation; growth stages; grain yield; Water Productivity.

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