Combined Effects of Pruning and Crop Removal Levels on Yield, Quality, and Physiological Properties in 'Merlot' and 'Cabernet Sauvignon' Grapevines

Soltekin O., Guler A., Teker T., Candemir A.

ERWERBS-OBSTBAU, cilt.64, sa.SUPPL 1, ss.129-140, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 64 Sayı: SUPPL 1
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1007/s10341-022-00719-1
  • Dergi Adı: ERWERBS-OBSTBAU
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Agricultural & Environmental Science Database, CAB Abstracts, Environment Index, Food Science & Technology Abstracts
  • Sayfa Sayıları: ss.129-140
  • Anahtar Kelimeler: Bud load, Crop level, Vine balance, Wine composition, Wine quality, VINIFERA CV SYRAH, WINE COMPOSITION, FRUIT COMPOSITION, SENSORY ATTRIBUTES, DEFICIT IRRIGATION, TEMPRANILLO GRAPE, CANOPY MANAGEMENT, HARVEST DATE, LEAF REMOVAL, LOAD
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

Crop level adjustment is a widely utilized management activity to prevent overcropping, improve berry and wine composition, and create a balance between vine size and yield. This study investigated the combined effects of pruning severity and crop removal treatments on yield, quality, and physiological activities in 'Merlot' and 'Cabernet Sauvignon' under semiarid climate conditions. Cultivars were subjected to three different balance pruning treatments with crop adjustment levels-L1 (10 + 10) with 15-20 retained clusters, L2 (20 + 10) with 25-30 retained clusters, and L3 (30 + 10) with 30-35 retained clusters-arranged in a randomized block design. Statistically significant higher values for total soluble solids (TSS) were found in the lower crop level regimen for both cultivars during the study. This situation suggests more rapid sugar accumulation, especially in L1. In the experimental years, better wine composition (especially total phenolics and anthocyanins) was achieved under lower crop level regimens. The lowest net photosynthesis and stomatal conductance values were obtained with the L1 regimen for 'Merlot.' In turn, higher net photosynthesis and intrinsic water use efficiency values were found with an increase of crop level in 'Cabernet Sauvignon.' Alcohol content was significantly higher under lower crop level regimens for both cultivars because of higher sugar accumulation and lower acidity. However, this situation may be undesirable in arid and semiarid climates. Consequently, the current study determined the optimum crop level to sustain yield and quality for 'Merlot' and 'Cabernet Sauvignon' in semiarid conditions, and it provides management techniques for growers to balance vine size and yield attributes.