Thesis (Ph.D.) - Cairo University - Faculty of Agriculture - Department of Pomology

This study was conducted during two successive seasons (2011 and 2012) on 10 years old of 'Le-Conte' pear trees grafted on Pyrus communis and grown in clay soil and spaced at 4 {u00D7} 5m apart in a private orchard at Fedemeen, Fayoum governorate to investigate the effects of compost tea (1.5kg / 10L water) as soil or foliar application in May - June - July and August in both seasons at 5 liter/tree, at each date. Also, three foliar antioxidant treatments at 1000 ppm of ascorbic acid, 200 ppm of thiamin and 200 ppm salicylic acid, in addition to the combinations between compost tea and antioxidants were studied on yield, fruit quality and nutrient leaf content of 'Le-Conte' pear trees. Foliar compost tea application recorded the highest trees growth, yield (Kg/tree) and better fruit quality and higher N, P, K, Ca leaves content as compared to soil compost tea application and control ones. As regard to the effect of tested antioxidants, ascorbic acid application recorded the highest yield/tree, best fruit quality as compared to other antioxidants and control trees. The interaction between compost tea and different antioxidant treatments revealed that foliar application of compost tea plus ascorbic acid gave the highest increment in yield/tree (Kg), and the best values of fruit quality, and NPK leaf content comparing to other treatments and control

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