Influence of Vine Loads With Fertile Buds on Grape Yield and Quality of Variety Zizak in Podgorica Vineyard Area

Abstract

Results of a two-year study of the influence of different vine loads with fertile buds on elements of grape yield and quality of Žižak grape variety are presented in this paper. The research was conducted in the Podgorica sub region, at the Lješkopolje site. Four different vine loads with fertile buds were applied: 14 buds, 18 buds, 20 and 24 buds per vine. The results of this research show that the applied loads significantly influence the examined parameters of the autochthonous variety Žižak. The highest percentage of developed and fertile shoots, as well as the average number of flowers per bud, had a variant with load of 14 buds. The relative coefficient of yielding in all examined load variants had mean values. In terms of the number of flowers per fertile shoot in the two-year average, variants with a load of 18 and 14 buds (1.44 and 1.39) stood out. The highest yield of grapes in the two-year average had the variant with a load of 24 buds-3.60 kg/vine, while the highest bunch weight had the variant V1-185 g. The quality of grapes also varied significantly under the influence of the vine load with fertile buds. The highest sugar content in must had variant with a load of 18 buds (22.32%), while the highest acid content (6.27g/l) was recorded in the variant with 24 buds per vine.

The Effects of Different Crop Loads on Yield, Quality, and Sugar Fractions in Early Sweet (Vitis vinifera L) Table Grape

“…In other words, when the total number of buds left per vine in winter pruning increased from 36 to 105 buds in both years, the yield increased by about 49.4%. These results are similar to the results reported in previous studies by Harikanth et al (2015), Kumar et al (2017), andPopović et al (2023) that the yield of fresh grapes increases with an increasing number of buds left in pruning.…”

“…The Average cluster weight was found between 508.20 and 740.0 g. As two years average, the heaviest clusters and berry weight (733.0 g) were determined in treatment T1 (36 buds vine -1 , a group) while the lowest weight clusters (580.7 g) were obtained in treatment T3 (105 buds vine -1 , c group) (Table 1). Previous studies (Fawzi et al, 2010;Pehlivan and Uzun, 2015;Popović et al, 2023) in similar research in different grape varieties are also consistent with the assertion that excessive crop load reduces cluster weight.…”

“…Also, the highest SSC/TA ratio value (29.80) was found in the T1, and the lowest value (26.65) was obtained in the T3 (Table 1). Studies on different grape varieties yielded similar results by Fawzi et al (2010), Ashraf andFarag (2022), andPopović et al (2023). Maturation of table grape (Vitis vinifera L.) extends from a period of almost 40 days from véraison to harvest.…”

“…As a two-year average, the highest berry weight was observed in T1 (4.41 g, a group) and followed by T2 (4.25 g, b group) and T3 (3.88 g, c group), respectively (Table 1). This result is convenient for Zhu-mie et al ( 2010), Gil et al (2013), Benavent et al (2014), and Popović et al (2020.…”

Temporal dynamics of Plasmopara viticola as function of bud load increase in 'Sauvignon Blanc'

“…To increase vineyard yield and improve its vegetative balance (Würz et al, 2020a), it is indicated to increase bud load per vine (Vitis vinifera L.) during winter pruning, which is the branch removal at the end of the dormancy period (Gangjee, 2012). The pruning may affect the number of branches, productive and qualitative potential of the vine, and vine management (Qiu et al, 2019;Teker & Altindisli, 2021), so it is important to establish the optimal ratio of specific bud load for each viticultural region, considering its cultivation system and technology level, in order to optimize production (Popović et al, 2020).…”