Improving Yield and Bunches Quality of Sultana ‘H4 strain’ Grapevines | ||
| Journal of Plant Production | ||
| Article 3, Volume 13, Issue 9, September 2022, Pages 661-666 PDF (1022.71 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2022.157868.1159 | ||
| Authors | ||
| E. Elatafi* 1; Doaa M. Hamza2; N. R. Samra2 | ||
| 1Pomology Dept., Fac. Agric., Mansoura Univ., Mansoura, Egypt | ||
| 2Pomology Dept., Fac. Agric., Mansoura Univ., Mansoura 35516, Egypt | ||
| Abstract | ||
| This study was carried out during the seasons of 2021-2022 to study the effect of GA3 plus urea each alone or with trunk girdling and bunches tipping on yield and bunch quality of Sultana ‘H4 strain’ grapevines. The data reveal that spraying vines with GA3 plus urea at the beginning of (15-20%) flowering significantly reduced the number of berries per bunch and the compactness coefficient of the bunch than the control. Furthermore, sprayed vines with GA3 plus urea with both trunk girdling and bunches tipping significantly produced a higher bunch weight, berry weight, and size. Despite this, treated bunches with GA3 plus urea gave no clear effect of SSC/acid ratio in berry juice than the control but increased the values of total chlorophyll a and b content in berry skin. Whereas, when girdling the trunk and tipping the bunch produced a higher SSC/acid ratio in berry juice and total carotenoid content in berry skin than the control. | ||
| Keywords | ||
| Sultana ‘H4 strain’; Gibberellic Acid (GA3); Urea; Girdling; Bunches Tipping | ||
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