EFFECTS OF KAOLIN AND DEFICIT IRRIGATION TREATMENTS ON SIRAH GRAPE VARIETY IN MEDITERRANEAN, TURKEY
[ N/A ]
Tarih
2022
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Parlar Scientific Publications (P S P)
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Mediterranean region, which is important in terms of area and production, is a viticultural area with hot and arid climatic characteristics. Grapevine may frequently get exposed to water stress under Mediterranean climatic conditions during its active growth period. Therefore, it is considered that the most important factor that inhibits plant growth is water stress. Potential decrease in precipitation and underground waters in the future makes water management necessary in terms of both the current period and the future. This study involved research on the effect of control (0%) and kaolin (5%) treatment on Sirah variety in different irrigation levels (%25, %50, %75, and %100) on vegetative growth (shoot length, number of nodes and leaf area, pruning weight), physiological characteristics (relative chlorophyll content (SPAD), stomata! conductance, photosynthetic quantum yield (QY), photosynthetically active radiation (PAR), specific leaf area, leaf thickness), grape quality (TSS, pH, acidity) and grape yield. Irrigation period in the vineyard started after berry set and continued until harvest time (the period with the weakest precipitation and the highest temperature). In irrigation treatment, deficit irrigation in comparison with I-4 caused decrease in number of shoot nodes and total leaf area. While decreased water amount did not cause an important change in specific leaf area and leaf thickness of vine, 25% and 50% irrigation caused decrease in chlorophyll content (SPAD) and photosynthetic quantum yield (QY) values in the period near harvest. 25% irrigation caused light intensity in canopy zone of vines to increase and leaf stomatal conductance to decrease. While it was determined that deficit irrigation reduced cluster and berry weight and TSS, pH and maturity index values remained low, grape yield decreased under water stress (25% and 50%). As a result of cumulative effect of kaolin on leaf size and number of shoot nodes, total leaf area decreased in the grapevine. Increase in chlorophyll content and decrease in stomatal conductance and specific leaf area were determined with in terms of leaf physiology. The increase in light intensity of cluster area reduced acidity and increased pH in juice and maturity index toward the ripeness of grapes in vines treated with kaolin.
Açıklama
Anahtar Kelimeler
Sirah, deficit irrigation, kaolin, physiology, yield, quality
Kaynak
Fresenius Environmental Bulletin
WoS Q Değeri
N/A
Scopus Q Değeri
Cilt
31
Sayı
9
