Benefits of calcium carbonate sprays on yield and fruit quality of samany and zaghloul date palm under new reclaimed soils

الملخص EN

The present study was carried out during 2010 and 2011 seasons on “Zaghloul” and "Samany" date palms growing at a private orchard in New Assuit City, Egypt, in order to study the effects of plant protect ant purshade (calcium carbonate) at 0.5%, 1%, 2%, 3% and 5 % on yield, fruit properties and harvesting date of Zaghloul and Samany date palm cultivars growing in new reclaimed soils.

In general, results indicated that spraying Zaghloul and Samany date palm bunches with purshared caused a significant increase in ultimate fruit retention, bunch weight and consequently total yield, fruit weight, height and pulp thickness as well as fruit moisture content, TSS and sugar contents, while tannins percentages were significantly decreased.

The promotion was associated with increasing concentrations .

In addition all Purshade treatments delay harvest date in comparison with control treatment.

The superior treatment concerning yield and fruit quality was spraying Purshade at 5 % three times started in Hababouk stage and ending in Khalal stage (15/ May, 15/ June and 15/ July ) which was most suitable for Zaghloul and Samany dates and could be consider as a recommended treatment under conditions of this experiment