Manejo do dossel vegetativo e seu efeito nos componentes de produção da videira Merlot

Miele, Alberto; Mandelli, Francisco

doi:10.1590/s0100-29452012000400002

Cited by 23 publications

(16 citation statements)

References 16 publications

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“…Indeed, the yield/vine and the number of clusters/vine had a significant correlation (r = 0.95; p < 0.05) but yield/vine was not significantly correlated (p > 0.05) to cluster weight, despite the fact that the weight/cluster of the organic grapes was slightly higher in the two first years and the average of three years. This result is in accordance with findings of previous work carried out with Merlot grapevines [11].…”

Section: Resultssupporting

confidence: 94%

Grapevine yield components and composition of Isabel grape produced according to the organic and conventional systems

Miele

2016

BIO Web Conf.

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Abstract. There is an increasing demand for organic grapes by the juice industry of Serra Gaúcha, Brazil. This region presents a humid and hot summer, ideal climatic conditions for the development of a number of diseases. To control such diseases and problems brought about by other organisms, growers apply pesticides on the grapevines which may leave residues in grapes. However, in general, grapes produced by organic system have lower yield, but there is a lack of research data on this subject. Thus, an experiment was carried out over three years in order to compare the yield components and the physicochemical composition of the must of Isabel grapes conducted in both production systems. When the grapes were ripe, variables related to yield components were evaluated, such as the number of clusters/vine, yield/vine and weight/cluster. Then the grapes were sampled and taken to the laboratory where they were crushed and the musts were centrifuged and analyzed. The 3-year data mean were submitted to correlation analysis and Principal Component Analysis. The results show that conventional grapevines produced 2.18 times more than organic. However, the grapes from the organic system had higher density, Brix, pH, Brix/titratable acidity ratio, P and Mg but lower K, and Ca varied little between both production systems.

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Section: Resultssupporting

confidence: 94%

Grapevine yield components and composition of Isabel grape produced according to the organic and conventional systems

Miele

2016

BIO Web Conf.

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“…Regarding shoot toppings, its purpose is to limit the vegetative growth of vines by removing the final part from herbaceous branches and a variable number of young underlying leaves (Miele and Mandelli, 2012). This is a common practice in grapevine cultivars in Brazil (Vitis vinifera L.), especially in grapes for winemaking purposes (Brighenti et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…This practice may be carried out by keeping a different number of leaves per shoot, which can vary from the shoot elimination up until the maintenance of only two leaves above the last cluster. This should be a rigorous choice, since if performed improperly it can affect negatively the vine development (Miele and Mandelli, 2012).…”

Section: Introductionmentioning

confidence: 99%

Shoot topping of ‘Niagara Rosada’ grapevine grafted onto different rootstocks

Silva¹,

Paiva²,

Pimentel³

et al. 2018

Aust J Crop Sci

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Vineyard cultural practices may influence amount of sugars, acids, phenolic compounds and antioxidant activity of grapes. Thus, the purpose of this study was to evaluate the effect of different shoot topping levels on the chemical characteristics of the grapes during its maturation, yield and the physicochemical characteristics and phenolic compounds of 'Niagara Rosada' grapevine grafted onto different rootstocks. The experiment was conducted in a 2-year-old vineyard of Niagara Rosada cultivar in Southeast of Brazil. The vines were trained on a unilateral cordon system in a vertical shoot positioning. The manual shoot topping was carried by leaving 6, 7, 8 or 9 leaves above the last cluster. Vines were topped 60 days after pruning, when the vines were in the beginning of bunch closure. All vines were grafted onto 'IAC 766' and 'IAC 572' rootstocks. Fruit maturation curve, yield and physicochemical grapes characteristics were analyzed to determine the effects of shoot topping levels and rootstocks. The rootstocks and the different shoot topping levels did not influence the yield, productivity and cycle duration of 'Niagara Rosada' grapevines. Larger and heavier clusters and berries were harvested from vines grafted on 'IAC 766' rootstock. However, grapes harvested from grapevines grafted on 'IAC 572' rootstock presented higher total anthocyanins content. The shoot topping carried out with 7 or 8 leaves above the latest cluster provided higher sugars, total polyphenols content and antioxidant activity.

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“…Basal leaf removal may be employed to improve air and light exposure around clusters, as well as to open access to disease-and pest-control chemicals (Miele & Mandelli, 2012). This vineyard practice is carried out in all wine-growing regions, usually between the setting and veraison phenological stages of the grapevine , although it has become more common before setting (Komm & Moyer, 2015).…”

Section: Introductionmentioning

confidence: 99%

Agronomic performance of 'Cabernet Sauvignon' with leaf removal management in a high-altitude region of Southern Brazil

Würz

Brighenti

Filho³

et al. 2017

Pesq. agropec. bras.

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-The objective of this work was to compare the effect of different times of leaf removal on the vegetative-productive efficiency and on the chemical and physical characteristics of 'Cabernet Sauvignon' clusters in a high-altitude region of the state of Santa Catarina, Brazil. The experiment was conducted in the 2015 and 2016 vintages, in a commercial vineyard, located in the municipality of São Joaquim, in the state of Santa Catarina, at 1,230-m altitude. The treatments consisted of different times leaf removal in the cluster zone, in the following phenological stages: full bloom, buckshot berries, pea-sized berries, veraison, and 15 days after veraison, besides a control without leaf removal. The evaluated variables were subjected to the analysis of variance and compared with the Scott-Knott test, at 5% probability. In a high-altitude region, leaf removal provides more adequate indices for plant vegetative:yield balance. It also increases yield when performed during the pea-sized berry and veraison stages, increases the fertility index when performed during the pea-sized berry stage, and improves the chemical composition of 'Cabernet Sauvignon' grape when performed up to the pea-sized berry stage. The obtained results show the importance of early leaf removal to obtain must with potential for the production of quality wines.

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Manejo do dossel vegetativo e seu efeito nos componentes de produção da videira Merlot

Cited by 23 publications

References 16 publications

Grapevine yield components and composition of Isabel grape produced according to the organic and conventional systems

Grapevine yield components and composition of Isabel grape produced according to the organic and conventional systems

Shoot topping of ‘Niagara Rosada’ grapevine grafted onto different rootstocks

Agronomic performance of 'Cabernet Sauvignon' with leaf removal management in a high-altitude region of Southern Brazil

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