Accelerating the growth and flowering of Eustoma grandiflorum by foliar application of nano-ZnO and nano-CaCO3
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One of the important goals of lisianthus (cut flower) producers is to reduce the growth period and increase the quality of the flower. The current research aimed to investigate the effects of foliar application of nano ZnO and nano CaCO3 on growth and flowering of lisianthus (Eustoma grandiflorum cv. Mariachi Blue). The experiment was carried out in greenhouse condition by spraying various concentrations of nano ZnO (3, 6 and 9 mg L−1) and nano CaCO3 (250, 500 and 750 mg L−1) every 20 days. According to the results, foliar spraying of nano ZnO (6 mg L−1) on lisianthus increased number of leaf and lateral branches, leaf chlorophyll content and petal anthocyanin content. Nano ZnO spray also increased number of flowers. The results demonstrated that the plants sprayed with 500 mg L−1 nano CaCO3, entered the flowering stage earlier and flowered about 15 days earlier than the control plants, while foliar spraying of nano ZnO delayed the flowering time. Foliar spraying during the growth period with nano CaCO3 (500 mg L−1) increased the number of flowers per plant. Also, the number of flowers was 56.3% higher than the control treatment. An increase in plant size was observed with the use of nano CaCO3. Highest flower diameter, plant height and leaf length in lisianthus were obtained by foliar spraying of nano CaCO3. The present study showed that calcium carbonate and zinc oxide nano fertilizers have a significant effect on growth characteristics and flowering quality of lisianthus.
KeywordsFlower size Flowering time Nano-fertilizer Nutrition Photosynthetic pigments
This study was funded by the Ilam University.
Conception and design: [Zeynab Roein]; Material preparation, data collection: [Zeynab Seyedmohamadi]; Data analysis [Shirin Rezvanipour]; Writing-original draft preparation: [Zeynab Roein]; Reading and editing the final manuscript: [Zeynab Roein; Shirin Rezvanipour].
Funding was provided by Ilam University.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
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