The effects of water deficit stress on seed yield and quantitative traits of Canola cultivars
Journal Title: International Journal of Farming and Allied Sciences - Year 2014, Vol 3, Issue 7
Abstract
Concerning the importance of oilseeds cultivation, especially canola in addition to the growing trend of its cultivated land and limited water resources in the world, this experiment was undertaken in split plot based on randomized complete block design (RCBD) with four replications in order to evaluate the effects of the water deficit stress on seed yield and quantitative traits of canola cultivars to determine the tolerant and sensitive cultivars. The main plots included two canola cultivars (RGS003 and Sarigol) and sub plots were five irrigation levels including; I1, irrigation during full season (control); I2, water deficit stress in stemming stage; I3, water deficit stress in budding stage; I4, water deficit stress in flowering stage and I5, water deficit stress in ripening stage. Mentioned treatments were selected in order to evaluate the canola relative resistance to water deficiency in these stages. During conducting the experiment, important traits of canola cultivars were measured including plant height, number of branches per plant, number of siliqua per plant, seed yield and volume of the consumed water in all irrigation treatments for both Sarigol and RGSoo3 cultivars. The highest water consumption efficiency was obtained for the cv. RGS003 and from water deficit stress treatment in ripening stage that was 0.682 ha-1, while the least water consumption efficiency rate was 0.482 ha-1 for the cv. Sarigol and from water deficit stress in flowering stage. The interaction effect of irrigation and canola cultivars indicated that the most seed yield reduction from water deficit stress was in budding stage and for cv. Sarigol was 2858 kg ha-1. So, the overall performance of the cultivars for seed yield indicates that under water deficit stress, the cv. RGS003 is superior to other cultivar. Hence, it can withstand low levels of water regimes.
Authors and Affiliations
Ghasemali Nazemi, Abolghasem Alhani
Keywords
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