Effect Of Using Some Organic Materials and Spraying with Citric Acid on the yield and fruits quality of Clementine mandarin Trees Grown in Calcareous Soil.

Abstract

This study was carried out during two successive seasons(2019-2020) in a private field in Al-Rafia village in Al-Bahloulia sub-district, to study the effect of different sources of organic matter on the production and quality of fruits of Clementine mandarin(Citrus reticulata.Blanco.) grafted on sour orange(Citrus aurantium.L) was planted in Calcareous soil. The trees are 15 years old and planted at a distance of 5x5 m. The results of the statistical analysis showed the superiority of poultry manure with spraying citric acid treatment  and the treatment of mineral fertilization with spraying citric acid (336.7-326.7)Kg as a cumulative yield for both seasons over the rest of the studied treatments. As for the specification of fruits, the treatment of poultry manure with spraying citric acid also outperformed the rest of the treatments in terms of the weight of the fruit(104.47)g, and the percentage of vitamin C in the juice(46.67)mg/100ml , and the percentage of total soluble solids (13.58%). As for the volume of juice, the treatment of mineral fertilization with spraying citric acid (42.08)cmᵌ was superior to the rest of the treatments.