تأثير الرش الورقي بمركبات الشد البيئي في بعض الصفات التشريحية و نسبة النضج في ثمار نخيل التمر Phoenix dactylifera L. صنف الحلاوي

This study was conducted on date palm tree, cv. Hillawi grown in a private orchard at Abi –EL-Khassib District , Basrah Governorate during the growing season of 2014, to investigate effect of foliar spray of vegeamino and drin at concentrations of (2 and 4) ml.L-1 and ascorbic acid at (500 and 1000) mg.L-1 , and number of sprays on some anatomical characters and ripening percentage of fruit .Results showed that Ascorbic acid at 1000 mg.L-1 recorded significant increases in thickness of fruit exocarp and outer mesocarp layers ,whereas Ascorbic acid at 500 mg.L-1 recorded significant increase in thickness of fruit inner mesocarp.Vegeamino at 2ml.L-1 gave significant increases in cell length and width of fruit inner mesocarp , whereas Drin at 4 ml.L-1 increased the number of cells in mm2 of fruit inner mesocarp significantly and Drin at 2ml.L-1 increased fruit ripening percentage significantly . Significant increases were recorded also for the number of sprays in cell length and width of fruit inner mesocarp and fruit ripening percentage , but no significant differences were found for this factor on the other studied characters . Bicombination of Vegeamino at 2ml.L-1with two sprays recorded significant increases in cell width and fruit ripening percentage , whereas Bi-combination of Vegeamino at 2 ml.L-1 with three sprays increased thickness of fruit exocarp layer and number of cells in mm2 of fruit inner mesocarp . Bi-combination of Vegeamino at 2ml.L-1 with one spray increased cell length significantly and Vegeamino at 4 ml.L-1 with tow sprays increased thickness of fruit outer mesocarp layer significantly , whereas Ascorbic acid at 500 mg.L-1 with one spray gave significant increase thickness of fruit inner mesocarp.