Int. J. Biosci.11(2), 68-76, August 2017
A field of study was carried out during the two consecutive years (2015-2016) on 30 years old Deglet-Nour cultivar that was grown in gypsum soil and irrigated with salt water which caused serious problems of soil salinity. Palms were fertilized with three levels of potassium (0, 2 and 3 kg /palm) as potassium sulphate K2SO4 (50%) combined with three levels of phosphorus (0, 1 and 2 kg/palm) as superphosphate (TSP) in order to study their influence on the yield, fruit quality and the necessary duration for the responses of palm tree to these fertilizing elements in such conditions. Data showed that applying 2 kg of potassium combined with 1 kg of phosphorus increased the yield and gave better results of fruits weight, length, diameter and weight of pulp. Fruits’ chemical characteristic also improved by the same treatment after two years of the study.
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