Influence of intensity of post-veraison defoliation or shoot trimming on vine physiology, yield components, berry and wine composition in Aglianico grapevines

2017 ◽  
Vol 23 (2) ◽  
pp. 226-239 ◽  
Author(s):  
G. Caccavello ◽  
M. Giaccone ◽  
P. Scognamiglio ◽  
M. Forlani ◽  
B. Basile
Keyword(s):  
Yield Components ◽  
Wine Composition

scholarly journals Rootstock-scion interaction:5. Effect on the evolution of Cabernet Sauvignon grape ripening

2019 ◽  
Vol 41 (3) ◽  
Author(s):  
Alberto Miele ◽  
Luiz Antenor Rizzon
Keyword(s):  
Principal Component Analysis ◽  
Regression Analysis ◽  
Yield Components ◽  
Polynomial Regression ◽  
Principal Component ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Cabernet Sauvignon ◽  
Total Soluble Solids ◽  
Wine Composition

Abstract The rootstock effect on grapevine yield components, grape must and wine composition and wine sensory characteristics were evaluated in previous studies. This experiment carried out over five years had the objective to determine the effect of the rootstock on the evolution of variables related to sugar and acidity contents of the juice during grape ripening. The treatments consisted of Cabernet Sauvignon grapevine grafted on rootstocks such as Rupestris du Lot, 101- 14 Mgt, 3309 C, 420A Mgt, 5BB K, 161-49 C, SO4, Solferino, 1103 P, 99 R, 110 R, Gravesac, Fercal, Dogridge and Isabel. The berries were sampled during the grape ripening period, on nine dates during the summer of each year. Taken to the laboratory, they were hand crushed and the juice was centrifuged to separate the solid and liquid phase, where the supernatant was then used for physicochemical analyses. The data were submitted to Principal Component Analysis (PCA) and polynomial regression analysis. The main results show that, at grape maturity, the PCA discriminated mainly the juices of CS/101-14 Mgt, CS/SO4 and CS/Gravesac, which had high density, total soluble solids, total soluble solids/titratable acidity ratio and pH, and CS/Dogridge and CS/Fercal, which had high titratable acidity. The density, total soluble solids, titratable acidity, total soluble solids/titratable acidity ratio increased as grape ripened, but the titratable acidity decreased. However, the increase or decrease rates were lower at the end of the grape ripening cycle according to the variable, and the total soluble solids having the highest increase (116.3%) and the titratable acidity the highest decrease (68.3%).

scholarly journals The influence of bird netting on yield and fruit, juice, and wine composition of Vitis vinifera L.

OENO One ◽  
2013 ◽  
Vol 47 (1) ◽  
pp. 35
Author(s):  
Vinay Pagay ◽  
Andrew G. Reynolds ◽  
K. Helen Fisher
Keyword(s):  
Yield Components ◽  
Fruit Juice ◽  
Growing Season ◽  
Soluble Solids ◽  
Positive Finding ◽  
Wine Quality ◽  
Cabernet Franc ◽  
Wine Composition ◽  
Migratory Patterns ◽  
The Impact

<p style="text-align: justify;"><strong>Aims</strong>: To investigate the impact of semi-permanent bird netting and timing of its application on Cabernet franc grapevine yield components and fruit, juice, and wine composition.</p><p style="text-align: justify;"><strong>Methods and results</strong>: Semi-permanent bird netting was installed over Cabernet franc grapevines at various times – post-bloom, bunch closure, and veraison – of the 2004 growing season in the Niagara Peninsula of Canada. At harvest, vine yield components were measured followed by berry and must compositional analysis of soluble solids, pH, titratable acidity (TA), color, and polyphenols. Wines made from these grapes were also analyzed (pH, TA, color, and polyphenols). It was found that installation of bird netting over grapevines had minimal effect on yield components and berry composition regardless of when the nets were installed. Must composition revealed significant decreases in soluble solids, pH, and color as a result of the netting, the least impact being when the nets were applied at post-bloom. Wine composition was similar to the must data with the netted treatments resulting in lower pH, higher TA, and decreased color. Total anthocyanins and polyphenols were slightly reduced as a result of the netting.</p><p style="text-align: justify;"><strong>Conclusions</strong>: Minimal impact of bird netting on yield, fruit, must and wine quality is a positive finding since netting is becoming more prevalent in vineyards worldwide due to changing migratory patterns of birds. It is recommended that netting be applied around post-bloom for the ease of application, to minimize shading effects, which could lead to decreased fruit quality, and to maintain yield.</p><p style="text-align: justify;"><strong>Significance and impact of the study</strong>: Use of bird netting is becoming more prevalent by grape growers worldwide due to changing migratory patterns of birds that feed on grapes. This study shows that bird netting is not detrimental to yield and fruit and wine quality especially when applied early in the growing season.</p>

Impact of Amigo Oil and KDL on Grapevine Postbudburst Freeze Damage, Yield Components, and Fruit and Wine Composition

2017 ◽  
Vol 69 (1) ◽  
pp. 77-88 ◽  
Author(s):  
Michela Centinari ◽  
Denise M. Gardner ◽  
Donald E. Smith ◽  
Maria S. Smith
Keyword(s):  
Yield Components ◽  
Wine Composition ◽  
Freeze Damage

scholarly journals Effects of timing of leaf removal on yield, berry maturity, wine composition and sensory properties of cv. Grenache grown under non irrigated conditions

OENO One ◽  
2008 ◽  
Vol 42 (4) ◽  
pp. 221 ◽  
Author(s):  
Javier Tardáguila ◽  
María Paz Diago ◽  
Fernando Martínez de Toda ◽  
Stefano Poni ◽  
Mar Vilanova
Keyword(s):  
Yield Components ◽  
Fruit Set ◽  
Titratable Acidity ◽  
Sensory Properties ◽  
Vitis Vinifera L ◽  
Leaf Removal ◽  
Alcohol Content ◽  
Total Polyphenol ◽  
Wine Composition ◽  
Defoliation Treatment

<p style="text-align: justify;"><strong>Aims</strong>: The objective of this study was to investigate the effects of timing of leaf removal on yield components, berry sensory characteristics, composition and sensory properties of Vitis vinifera L. Grenache wines under non-irrigated conditions.</p><p style="text-align: justify;"><strong>Methods and results</strong>: The effects of timing of defoliation (fruit set and veraison) on yield components, berry maturity, wine composition and sensory properties of head trained, non irrigated, Grenache vines grown in Rioja appellation were studied. Leaf removal did not significantly modify total leaf area per vine as well as yield components. Grenache berries from early defoliated vines achieved the highest skin and technological maturity. Wine parameters, such as alcohol content, pH, titratable acidity, tartaric acid and total polyphenol index were unaffected by defoliation. Conversely, early leaf removal carried out at fruit set, significantly reduced the malic acid content of the wine and enhanced its colour intensity. Aroma complexity, mouthfeel, tannin quality and persistence were found to be significantly higher in the wine corresponding to the early leaf removal treatment. This was also the most preferred wine in terms of overall value.</p><p style="text-align: justify;"><strong>Conclusion</strong>: This article shows that timing of leaf removal had a marked effect on berry maturity, wine composition and sensory properties of Grenache wines made from grapes grown under dry-farmed conditions.</p><p style="text-align: justify;"><strong>Significance and impact of study</strong>: The results suggest that the timing of defoliation induces significant changes in Grenache wine composition and its sensory attributes. Late leaf removal was much less effective than early leaf removal in affecting final wine composition and quality. Grenache wine from the early defoliation treatment was rated the most preferred as of global value.</p>

scholarly journals Effects of Vine Water Status on Yield Components, Vegetative Response and Must and Wine Composition

2019 ◽  
Author(s):  
Pilar Baeza ◽  
Pedro Junquera ◽  
Emilio Peiro ◽  
José Ramón Lissarrague ◽  
David Uriarte ◽  
...  
Keyword(s):  
Yield Components ◽  
Water Status ◽  
Wine Composition

scholarly journals Early Defoliation Techniques Enhance Yield Components, Grape and Wine Composition of Cv. Trnjak (Vitis vinifera L.) in Dalmatian Hinterland Wine Region

Plants ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 551
Author(s):  
Ana Mucalo ◽  
Irena Budić-Leto ◽  
Katarina Lukšić ◽  
Edi Maletić ◽  
Goran Zdunić
Keyword(s):  
Yield Components ◽  
Sugar Content ◽  
Practical Importance ◽  
Vitis Vinifera L ◽  
Cluster Architecture ◽  
Wine Composition ◽  
Cluster Thinning ◽  
T1 And T2 ◽  
Berry Composition ◽  
Wine Region

Defoliation and cluster thinning are of practical importance in a control of the grapevine source-sink balance, cluster architecture, microclimate and berry composition. Nevertheless, their effectiveness on wine composition is unexplored. In this work, the impacts of preflowering (T1), after berry set (T2), and veraison defoliation (T3) and cluster thinning (T4), on yield components, grape and wine composition of cv. Trnjak are given. Implemented techniques significantly reduced yield and affected grape and wine components in comparison to untreated control (C). Despite lowest number of clusters ensured by cluster thinning, defoliation at veraison had lowest yield. Defoliations improved cluster architecture parameters. Highest berry per se was in preflowering T1 and lowest at veraison T3 defoliation. Berries of T1 had lowest sugar content (19.47 °Brix) while T3 had highest (22.3 °Brix), and the reverse is seen in total acidity highest in T1 (6.12 g/L) and lowest in T3 (5.01 g/L). Wines of early defoliations (T1 and T2) had lowest alcohol and highest anthocyanin concentration. Both techniques applied at veraison produced wines with lower anthocyanins and flavonols than those obtained without any intervention (C). In conclusion, the early defoliations (T1 and T2) improve yield and wine composition of cv. Trnjak in the Mediterranean region of Croatia.

Effect of sowing date and nitrogen on yield, components yield and oil characteristic of medicinal flax

Planta Medica ◽  
2009 ◽  
Vol 75 (09) ◽  
Author(s):  
MM Rahimi ◽  
G Normohamadi ◽  
A Aeinehband
Keyword(s):  
Yield Components ◽  
Sowing Date

Combining ability and heterosis studies across environments in linseed (Linum usitatissimum L.)

2011 ◽  
Vol 59 (1) ◽  
pp. 87-102 ◽  
Author(s):  
S. Sood ◽  
N. Kalia ◽  
S. Bhateria
Keyword(s):  
Seed Yield ◽  
Linum Usitatissimum ◽  
Combining Ability ◽  
Yield Components ◽  
Block Design ◽  
Linum Usitatissimum L ◽  
Randomized Block Design ◽  
Component Traits ◽  
Parental Lines ◽  
Fibre Yield

Combining ability and heterosis were calculated for fourteen lines of linseed in a line × tester mating design using twelve lines and two diverse testers in two different environments. The hybrids and parental lines were raised in a completely randomized block design with three replications to investigate seed and fibre yield and their component traits. Genetic variation was significant for most of the traits over environments. Combining ability studies revealed that the lines KL-221 and LCK-9826 were good general combiners for seed yield and most of its components, whereas LMH-62 and LC-2323 were good general combiners for yield components only. Moreover, KL-221 was also a good general combiner for fibre yield. Similarly, B-509 and Ariane were good general combiners for fibre yield and most of its components. Among the specific cross combinations, B-509 × Flak-1 was outstanding for seed yield per plant and B-509 × KL-187 and LC-2323 × LCK-9826 for fibre yield per plant, with high SCA effects. In general, the hybrids excelled their respective parents and the standard checks for most of the characters studied. Based on the comparison of mean performance, SCA effects and the extent of heterosis, the hybrids LC-2323 × LCK-9826 and B-509 × KL-221 appeared to be the most promising for both seed and fibre yield. Other promising combinations were LC-2323 × KL-210 and B-509 × Ariane for seed and fibre yield, respectively. The superiority of LC-2323, LCK-9826, KL-221, B-509 and Ariane as good general combiners was further confirmed by the involvement of these parents in the desirable cross combinations.

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