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Zn Foliar Spray as a Management Strategy Boosts Oil Qualitative and Quantitative Traits of Spring Rapeseed Genotypes at Winter Sowing Dates

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Abstract

To determine the suitable sowing date in each region, it is important to note that environmental conditions should be optimal during the crop growing season. Plant nutrition using macro-elements and micro-elements improves crop growth and quantitative and qualitative yields under environmental stresses. A 2-year experiment (2015–2016 and 2016–2017) was conducted to investigate the effect of zinc (Zn) foliar spray on quantitative and qualitative yields of spring rapeseed genotypes at winter sowing dates. The factorial split-plot arrangement of treatments was set up in a randomized complete block design with three replications. Main plots included three winter sowing dates of 9, 19, and 29 February and Zn foliar spray at two levels of non-Zn foliar spray (control) and Zn foliar spray (5 g l−1 at the stem elongation stage). Sub-plots contained four genotypes of Sarigol, Dalgan, Salsa, and Solar. While silique number per plant, seed number per silique, 1000-seed weight, seed yield, oil yield and content, and oleic, linoleic, and palmitic acids of the study genotypes were lessened at late sowing dates, contents of linolenic, stearic, and erucic acids and glucosinolate were significantly increased in such condition. Zn foliar spray improved seed yield and yield components, oil yield and content, and linoleic acid content, while contents of linolenic, stearic, and erucic acids and glucosinolate were dropped. Overall, the current study suggests that to produce the optimal quantitative and qualitative yields in rapeseed agro-ecosystems, genotypes should be cultivated on an optimum winter sowing date (February 9) and treated with Zn.

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Acknowledgements

The authors gratefully acknowledge the support provided for this survey by the Seed and Plant Improvement Institute (SPII), Karaj, Iran. The authors are thankful to the Editor-in-Chief and reviewers for their constructive suggestions and comments.

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Amir Hosein Shirani Rad: Conceptualization, methodology, and writing (original draft preparation); Farnaz Ganj-Abadi: Project administration and field practices; Ehsan Ollah Jalili: Investigation and field practices; Hamed Eyni-Nargeseh: Software, methodology, formal analysis, and writing (original draft preparation); Nadia Safavi Fard: Software.

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Correspondence to Hamed Eyni-Nargeseh.

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The authors declare no competing interests.

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Rad, A.H.S., Ganj-Abadi, F., Jalili, E.O. et al. Zn Foliar Spray as a Management Strategy Boosts Oil Qualitative and Quantitative Traits of Spring Rapeseed Genotypes at Winter Sowing Dates. J Soil Sci Plant Nutr 21, 1610–1620 (2021). https://doi.org/10.1007/s42729-021-00465-5

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  • DOI: https://doi.org/10.1007/s42729-021-00465-5

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