Document Type : Original Article
Authors
1
Pomology Dept., National Research Centre, Giza, Egypt
2
professor of pomology ,National Research Centre
3
pomology, National research centre, Cairo, Egypt
4
oils and fats department, food technology research institute, agriculture research center
5
Oils and Fats Research Dept., Food Technology Research Inst., Agricultural Research Center
Abstract
This experiment was conducted in an olive orchard in the 2018 and 2019 seasons, located in El-Khatatba region, El-Behira Governorate, Egypt, in order to study the effects of spraying trees with ammonium molybdate ([NH4]2MoO4), magnesium sulphate (MgSO4) and potassium thiosulfate (K2S2O3), either individually or in combinations, on leaf mineral content, the quality characteristics of Coratina olives, yield, oil content and properties. The treatments were applied twice in September and October of each season. In both seasons of the experiment, spraying trees with any of the fertilizer compounds under study had a positive effect, compared to control, on the yield, physical characteristics of the fruits, the leaves’ minerals content, as well as the fruit oil content, and maintaining its quality as an extra virgin oil. Results extracted from this study, indicated that the potassium thiosulfate and ammonium molybdate together led to obtaining the highest yield of the trees compared to the untreated ones in both seasons, while spraying the trees with potassium thiosulfate, ammonium molybdate and magnesium sulphate, combined together, led to obtaining the highest percentage of oil from the fruits compared to the control trees in both seasons
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