Investigation of the Effect of Temperature on the Growth Stages of Yaghouti Grapes (Vitis vinifera L) in the Sistan Region | ||
| مجله ترویجی انگور | ||
| Volume 8, Issue 2, June 2026, Pages 1-12 PDF (598.13 K) | ||
| Author | ||
| Mansour Fazeli Rostampour* | ||
| assistant professor/Sistan Agricultural and Natural Resources Research and Education Center | ||
| Abstract | ||
| The phenomenon of global warming has led to an increase in temperature and, consequently, alterations in the growth pattern of Yaghouti grape (Vitis vinifera L.) in the Sistan region. Therefore, to prevent yield reduction, it is necessary to implement changes in vineyard management practices. This experiment was conducted at the Agricultural and Natural Resources Research and Education Station in Zahak County over the years 2019 to 2024. Maximum and average daily temperatures were recorded, and phenological stages including bud break, flowering, berry color change (veraison), and harvest were monitored daily. The results indicated that the number of days from bud break to harvest for the first to fifth years were 107, 100, 94, 95, and 99 days, respectively. The accumulated growing degree days at the time of fruit harvest in the first to fifth years were 1434.6, 1431.8, 1424.9, 1418.4, and 1408.5, degree-day °C respectively. Fruit yield for the first to fifth years was 7140, 6843, 6545, 6679, and 6677 kg/ha, respectively. Overall, the findings of this experiment demonstrated that the gradual increase in temperature and the resulting changes in the growth pattern of Yaghouti grapes in the Sistan region led to an advancement in the timing of bud break from 2019 to 2024. | ||
| Keywords | ||
| Berry color change; bud break; flowering; fruit harvest; growing degree days | ||
| References | ||
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