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.

中文翻译：

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大量营养素供应对石榴生殖发育的影响。

在过去的二十年中，石榴的种植显着扩大。但是，关于其施肥需求以及大量营养素对其生殖发育的影响的信息有限。使用施肥系统，将两种商品化石榴品种“ Wonderful”和“ Emek”在500升容器中种植3年。测量了发育和繁殖指数，以探索树木对灌溉溶液中氮（N），磷（P）和钾（K）含量升高的响应。雄激素的比率仅在实验的第一年受养分含量的影响，较高的氮和磷含量导致总花中雌雄同体比例更高。磷水平对两个品种中每棵树的雌雄同体总数有积极影响。雌雄同体和雄蕊花之间记录的差异包括养分浓度和干重。灌溉溶液中的氮浓度对坐果率和假种皮数量产生积极影响。我们得出的结论是，仅氮和磷的严重缺乏会影响雄激素的性状，在本研究中检测的水平下，钾几乎不会影响石榴的繁殖。