Prof. Ahmed Ahmed Rezk El_Said Atawia :: Publications:

This study was conducted in two successive seasons on Sukkary mango trees cultivar grown in an private orchard at wade El-tequnologia region in Sinai east Suez canal , Ismailia Governorate to study response of mango trees to organic manure sources (poultry manure , sheep dung and compost ) ,olive oil waste water at 25 or 50 L. ree and inoculation the soil with mixed ( N-fixation and phosphate dissolving bacteria) on flowering, yield indicators and fruit quality of mango trees. Using compost , olive oil waste water at 25 L. ree and biofertilization as single use or in combination gave the highest sex ratio , fruit set , number of fruits per tree, yield (kg ree), fruit weight (g), fruit volume (cm)3, vitamin C (mg100gm pulp ),total sugars % , non reducing sugars % , total soluble solid (TSS) % and TSS acidity ratio and the lowest fruit drop% , reducing sugars % and total acidity % and failed to gave any distinctive effect on malformed panicle percentage, fruit length (cm), fruit diameter (cm) and fruit shape index compared with untreated trees. Consequently, according to the previous results it is preferable to using compost at 50 kg ree, olive oil waste water at 25 L. ree or biofertilizers by (one liter from Azotobacter, one liter from Azospirillium and one liter from phosphate dissolving bacteria (PDB)) were mixed , dissolved in 140 liter water and added at 2 liter tree) as a single use of organic fertilization or single biofertilization on Sukkary mango trees under Sinai condition. Biofertilization could be used in combination with compost and olive oil waste water at 25 L. ree to increased Sukkary mango yield and help to product clean fruits without pollution.