EFFECTS OF POTASSIUM APPLICATION ON THE CROP TRAITS, QUALITY, AND YIELD OF RAPESEED CULTIVARS AT LATE-SEASON DROUGHT STRESS

Authors

  • S. Farahani, E. Majidi Heravan, A.H. Shirani Rad, G. Noormahamadi

Abstract

In order to reduce the damage caused by late-season drought stress on rapeseed plant, a split plot factorial experiment was implemented in a complete randomized block design with three replications in Iran (Karaj) for two years (2014-2016). Treatments were application and non-application of potassium sulphate, and irrigation at three levels of normal irrigation (control), cessation of irrigation from flowering and silique stages onwards, which were assigned as factorial to main plots. Five winter rapeseed cultivars, namely Opera, L72, KR1, GKH3705, GKH0224, and Neptune, were placed in sub-plots. In the interaction of cultivars on the canopy temperature, L72 had the lowest average canopy temperature (30.93 °C). The interaction of potassium sulfate × irrigation × cultivar on seed oil yield and glucosinolate content was significant at 1% level. The promising L72 line is recommended with the highest oil yield (2961 kg/ha) and a standard high glucosinolates content with potassium sulfate application and normal irrigation. The same line contained the highest total chlorophyll content at all irrigation levels. Opera cultivar is also recommendable with the highest oil yield (2281 and 1618 kg/ha at cessation of irrigation from the silique and flowering stages onwards, respectively) with potassium sulfate application at late-season drought stress and having standard glucosinolate levels

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Published

2021-04-01

How to Cite

S. Farahani, E. Majidi Heravan, A.H. Shirani Rad, G. Noormahamadi. (2021). EFFECTS OF POTASSIUM APPLICATION ON THE CROP TRAITS, QUALITY, AND YIELD OF RAPESEED CULTIVARS AT LATE-SEASON DROUGHT STRESS. International Journal of Modern Agriculture, 10(2), 1614 - 1626. Retrieved from http://modern-journals.com/index.php/ijma/article/view/893

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