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Growth, yield, and quality of roselle (Hibiscus sabdariffa L.) plants as affected by nano zinc and bio-stimulant treatments

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Abstract

Nanoparticles are one of the most widely studied materials in this century, and they have important uses in various fields, including agriculture. Bio-stimulants play a vital role in the sustainable development of horticultural crops. The aim of this study was to assess the effect of nano zinc and bio-stimulants (salicylic acid, moringa extract, seaweed extract) on growth, yield, and quality of roselle plants. The experiment was conducted during 2018 and 2019 and was a completely randomized split-plot design. Nano zinc oxide of 0, 5, 10, and 15 ppm was used as the main plot, and bio-stimulants were used as the sub-plot. The results showed that application of nano zinc led to significant increases in growth, yield, photosynthetic pigments, as well as anthocyanin content associated with increased zinc content in leaves. The highest values ​​of all traits ​​occurred under treatment of 10 ppm of nano zinc. Also, bio-stimulants showed positive effects on all traits, and the best results were achieved under treatment with seaweed, followed by moringa extract. The correlation coefficients showed significant positive correlations among calyxes yield and anthocyanin and zinc content as well as with other growth traits and photosynthetic pigments. These results highlighted the important role of nano zinc in improving the growth, yield, and quality of the roselle plant, as well as the positive effects of seaweed as a bioactive stimulant. Therefore, it is recommended to include nano zinc and seaweed extract in fertilization programs for achieving a sustainable production system of such crops.

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Acknowledgements

The authors extend their sincere thanks and appreciation to the administration of the Faculty for their contribution in providing all the facilities and equipment's necessary to conduct the research.

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This study is a part of MSc thesis of YZH under supervision of SSAA, WSS and SS Concept, SSAA, WSS and SS; methodology, YZH, SSA, SS and WSS; formal analysis, ASSA, and WSS; investigation, YZ; resources, SSAA and YZH; data collection, YZH; writing—original draft preparation, YZH; writing—review and editing, SSAA and WSS All authors have read and agreed to the published version of the manuscript.

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Correspondence to Wagdi Saber Soliman.

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The authors declare they have no conflict of interest.

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Communicated by Wook Oh.

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Hassanein, Y.Z., Abdel-Rahman, S.S.A., Soliman, W.S. et al. Growth, yield, and quality of roselle (Hibiscus sabdariffa L.) plants as affected by nano zinc and bio-stimulant treatments. Hortic. Environ. Biotechnol. 62, 879–890 (2021). https://doi.org/10.1007/s13580-021-00371-w

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  • DOI: https://doi.org/10.1007/s13580-021-00371-w

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