Influence of spraying zinc sulphate before and during blooming stage on fruit quality and quantity of “Manzanillo” Olives
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Abstract
This study was carried out during the two successive seasons (2011 and 2012) on olive treesManzanillo cv. The trees were 10 years old growing in sandy soil at a private orchard in Ismailia governorate, Egypt. This investigation was performed to study the effect of zinc sulphate on olive trees Manzanillo cv., zinc sulphate concentration ( 0, 0.25 and 0.5%) was used as foliar application once time at pre-blooming (early March) or at full bloom (early April) or at pre-blooming + full bloom. At the end of the season, yield (kg/tree) and Fruit quality: average fruit size (volume), weight, shape index (length\ diameter), pulp\pit ratio, fruit oil and acidity percentage were recorded. The obtained results showed that, Manzanillo olive trees received zinc sulphate at 0.5% has positive effect on fruit characteristics in terms of fruit weight and fruit oil % and the total fruit yield per tree.
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