Improvement of “Kinnow” mandarin fruit productivity and quality by urea, boron and zinc foliar spray
2018
Al-Obeed, Rashid S. | Ahmed, Mahmoud Abdel-Aziz | Kassem, Hassan A. | Al-Saif, Adel M.
The present study was carried out on Kinnow mandarin trees (Citrus reticulata Blanco) to study the effect of urea, zinc (Zn) and boron (B) foliar sprays either alone or in combinations on fruit yield and quality. Trees were grown in alkaline sandy loam soil at Dirab, Riyadh, Saudi Arabia. All trees were sprayed twice: before full bloom (February) and after fruit set (April) during two growing seasons. The obtained results showed a significant increase in tree yield and enhancement in fruit physical characteristics (fruit weight, pulp, juice, volume, length and diameter), as well as fruit chemical characteristics [soluble solids content, acidity, pH, total sugars and ascorbic acid] by all foliar treatments in comparison with the control (water only) in both seasons. Spraying urea in combinations with B and Zn resulted in higher fruit yield and better physico-chemical characteristics as compared with urea only, urea + B or urea + Zn.
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