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Improving Washington Navel Orange Trees Productivity by Foliar Spray with Calcium Chloride, Calcium Nitrate and Calcium Chelate

By walaa on June 15,2008


Mohamed H. El Sheikh, Nagwa S. Zaeid and Salwa A. Khafagy

       Nine years old Washington Navel Orange Trees grow on clayey soil at Ashmoun District, AlMenoufyaGovernorate, Egypt; were sprayed with calcium chloride at 1, 2 and 3%, calcium nitrate at 1, 2 and 3%and calcium chelate at 1000, 2000 and 3000ppm at 3 spraying dates; 15th of April, 15th of June and 15th ofAugust. Results indicated that spraying nutrients increased N, P, K and Ca content in leaves comparedwith the untreated trees. Meanwhile, yield as number of fruits and number of fruits/tree weresignificantly improved by spraying different nutrient especially when sprayed with calcium nitrate orcalcium chloride at 3%. Creasing and fruit cracking/trees were significantly decreased by sprayingcalcium chloride at 3%. However fruit quality (physical and chemical characteristics) were significantlyimproved by spraying different nutrient treatments at higher concentrations.Keywords: Washington Navel Orange, foliar spray, Mineral content, Yield and Fruit quality, Creasing,

Fruit cracking.

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