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Article

The Effect of Macronutrient Availability on Pomegranate Reproductive Development

1
Gilat Research Center, Agricultural Research Organization, The Volcani Center, M.P. Negev 85280, Gilat, Israel
2
College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
3
Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7628604, Israel
4
Fertilizers and Chemicals Ltd., Haifa 12949, Israel
*
Author to whom correspondence should be addressed.
Plants 2020, 9(8), 963; https://doi.org/10.3390/plants9080963
Received: 15 July 2020 / Revised: 28 July 2020 / Accepted: 29 July 2020 / Published: 30 July 2020
(This article belongs to the Section Plant Nutrition)
Pomegranate cultivation has expanded significantly in the last two decades. However, there is limited information on its fertilization requirements and the effect of macronutrient availability on its reproductive development. Two commercial pomegranate cultivars—“Wonderful” and “Emek”—were grown in 500-L containers for 3 years, using a fertigation system. Development and reproduction indices were measured to explore the trees’ responses to elevated levels of nitrogen (N), phosphorus (P) and potassium (K) in the irrigation solution. Andromonoecy rate was affected by nutrient levels only in the first year of the experiment, with higher levels of N and P leading to a greater proportion of hermaphrodites out of total flowers. P level had a positive effect on the total number of hermaphrodites per tree in both varieties. Differences recorded between hermaphroditic and staminate flowers included nutrient concentrations and dry weight. Fruit set and aril number were positively affected by N concentration in the irrigation solution. We conclude that only a severe deficiency of N and P affects the andromonoecy trait, and that at the levels examined in this study, K hardly influences pomegranate reproduction. View Full-Text
Keywords: andromonoecy; flowering; male flower; bisexual flower; NPK; Punica granatum andromonoecy; flowering; male flower; bisexual flower; NPK; Punica granatum
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MDPI and ACS Style

Lazare, S.; Lyu, Y.; Yermiyahu, U.; Heler, Y.; Kalyan, G.; Dag, A. The Effect of Macronutrient Availability on Pomegranate Reproductive Development. Plants 2020, 9, 963. https://doi.org/10.3390/plants9080963

AMA Style

Lazare S, Lyu Y, Yermiyahu U, Heler Y, Kalyan G, Dag A. The Effect of Macronutrient Availability on Pomegranate Reproductive Development. Plants. 2020; 9(8):963. https://doi.org/10.3390/plants9080963

Chicago/Turabian Style

Lazare, Silit, Yang Lyu, Uri Yermiyahu, Yehuda Heler, Gershon Kalyan, and Arnon Dag. 2020. "The Effect of Macronutrient Availability on Pomegranate Reproductive Development" Plants 9, no. 8: 963. https://doi.org/10.3390/plants9080963

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