Effect of Foliar Applications of Urea on Flowering, Fruit set, Yield and Fruit Quality of Washington Navel Orange Trees | ||
| Egyptian Journal of Horticulture | ||
| Article 7, Volume 43, Issue 2, December 2016, Pages 299-316 PDF (1.15 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejoh.2016.3552 | ||
| Abstract | ||
| THIS STUDY was carried-out during two successive seasons …. 2014 and 2015 on 10 –year-old Washington Navel orange trees, cultivated in heavy loamy soil under El-Kalubia governorate conditions. Urea foliar applications at 1% or 2% concentrations in one time or twice at both mid of December and January. Morphological and microscopic studies cleared that, both Urea 1% one-time or twice applications improved the floral initiation and differentiation and reduced blooming process period for Washington Navel orange from 8 to 6 weeks and increased the deformity pollen grains when compared to control. Urea 1% twice applications significantly improved fruit set and total yield and the most of physical and chemical fruit properties in this study . Moreover, urea 1% twice applications significantly increased total indols and reduced total phenols in flower buds during blooming stages which positively reflected on fruit setting and yield. | ||
| Keywords | ||
| urea; Navel orange; flowering; fruit quality | ||
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