Desfolha em videiras americanas e viníferas na fase de pré-maturação dos frutos

Anzanello, Rafael; Souza, Paulo Vítor Dutra de; Coelho, Pedro Ferreira

doi:10.1590/s0103-84782011005000080

Cited by 4 publications

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“…Cabernet Sauvignon in the conditions of Bento Gonçalves-RS noted that the high defoliation had influence on the phenology (maturation delay) and on the production potential (11% n° of clusters per plant) in relation to the control and to the intermediate defoliation (25% and 50%), there was a moderate control of growth (-9,9% branches, -11,6% foliar area) followed by an increment in the number of berries per cluster (+23%), with lesser weight and individual diameter, favoring the relation peel/pulp (+5,8%), which is beneficial for oenological purposes. ANZANELLO et al (2011) observed that the treatments of defoliation performed up to the height of the clusters in the vine cultivars did not influence in the production per plant, cluster mass, AT, SS and pH of the wort, and that the localized removal of leaves up to the clusters height, during the beginning of the berries maturing, do not alter the quantitative and qualitative variables of the fruits. Moreover, they verified that for the 'Niagara Branca' and 'Concord' cultivars the defoliation performed above the clusters causes a maturation delay of the grapes and negatively affects the physical-chemical characteristics of fruits.…”

Section: Resultsmentioning

confidence: 83%

Defoliation levels on gas exchange and composition of grape clusters cv. Italia

Souza

Ribeiro

Dantas

et al. 2014

Revista Brasileira De Tecnologia Aplicada Nas Ciências Agrárias

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The objective of this study was to evaluate the influence of defoliation on gas exchange of vine leaves at different phenological stages, and also in the development of clusters and berries of cv. Italia in the Valley of Submédio San Francisco. It was performed four levels of defoliation (5, 10, 15 and 20 leaves kept in production branch) and nine repetitions. The assessments of gas exchange (CO 2 assimilation rate (A, μmol CO 2 m -2 s -1 ), transpiration rate (E, mmol water steam m -2 s -1 ), stomatal conductance (gs, mol m -2 s -1 ), water use efficiency (USA μmolCO 2 ; mmol H 2 O) -1 , carboxylation activity of the ribulose enzyme 1,5-diphosphate carboxylase (Rubisco) and leaf temperature were determined in four phenological phases (60, 72, 84 and 106 days after pruning). It was also evaluated: yield per plant (kg plant -1 ), diameter (mm), length (mm) and volume (mL) average of berries; soluble solids content (°Brix) and titratable acidity. Results revealed no significant differences between the levels of defoliation in the traits studied during the development stages of the berries, indicating that removal of leaves did not affect the gas exchange process of the leaves opposed to the cluster. Efeito da desfolha sobre as trocas gasosas e a composição dos cachos da cultivar ItáliaResumo O objetivo do trabalho foi avaliar a influência da desfolha nas trocas gasosas de folhas de videira em diferentes fases fenológicas e, também, no desenvolvimento dos cachos e bagas da cv. Itália no Vale do Submédio São Francisco. Foram realizados quatro níveis de desfolha (5, 10, 15 e 20 folhas mantidas no ramo de produção) e nove repetições. As avaliações de trocas gasosas, taxa de assimilação de CO 2 (A, μmol CO 2 m -2 s -1 ), taxa de transpiração (E, mmol vapor d'água m -2 s -1 ), condutância estomática (gs, mol m -2 s -1 ), eficiência do uso da água (EUA, μmolCO 2 (mmol H 2 O) -1 ), atividade de carboxilação da enzima ribulose 1, 5-difosfato carboxilase (Rubisco) e temperatura da folha, foram determinadas em 4 fases fenológicas (60, 72, 84 e 106 dias após a poda). Também foram avaliados: produção por planta (kg planta -1 ), diâmetro (mm), comprimento (mm) e volume (mL) médio de bagas; teor de sólidos solúveis (ºBrix) e acidez titulável. Os resultados obtidos não revelaram diferenças significativas entre os tratamentos de níveis de desfolha, em relação às características estudadas, durante as fases de desenvolvimento das bagas, indicando que a remoção das folhas não afetou os processos de trocas gasosas das folhas opostas ao cacho.Palavras-chave: Vitis vinifera L.; taxa de assimilação; crescimento baga. Efecto de la defoliación en el intercambio de gases y composición de los racimos de la vid Italia ResumenEl objetivo de este estudio fue evaluar el efecto de la defoliación sobre el intercambio gaseoso de las hojas de vid en las diferentes etapas fenológicas y también en el desarrollo de racimos y bayas del cv. Italia, en el valle del Submédio -ISSN 1983-6325 (On line) e-ISSN 1984-7548 Souza et al. (2014 San Francisco (Bra...

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Section: Resultsmentioning

confidence: 83%

Defoliation levels on gas exchange and composition of grape clusters cv. Italia

Souza

Ribeiro

Dantas

et al. 2014

Revista Brasileira De Tecnologia Aplicada Nas Ciências Agrárias

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“…Thus, the variation between 2.82 and 3.05 found in this present study was slightly below that indicated for the variety. Anzanello et al (2011), when studying the Niagara, Concord, Cabernet Sauvignon and Merlot varieties at different levels of defoliation, concluded that the removal of leaves up to the height of the bunch at the beginning of ripening of the berries does not change the quantitative and qualitative variables of the fruits. The same authors also verified that, for Niagara and Concord, the defoliation performed above the bunches caused a delay in the maturation of the grapes, negatively affecting the physicalchemical characteristics of the fruits.…”

Section: Resultsmentioning

confidence: 99%

Fruit quality and occurrence of mildew in Niagara Rosada grown under plastic cover and defoliation rates

et al. 2020

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Fruit quality and occurrence of mildew in Niagara Rosada grown under plastic cover and defoliation ratesThe purpose of this study was to evaluate the agronomic behavior of the Niagara Rosada variety cultivated under plastic cover, using defoliation intensities, and its influence on the Plasmopara viticola. The experiment was conducted in Francisco Beltrão, PR, Brazil, in a vineyard of Niagara Rosada variety in a trellised system during the 2016/2017 and 2017/2018 crop seasons. The experimental design consisted of randomized blocks, in a 5 x 2 factorial scheme being five percentages of defoliation (0%, 10%, 20%, 30% and 40%,) and use of coverage (with and without coverage), with three blocks of three useful plants per experimental plot. The temperature, air humidity and incidence of mildew on the bunches and leaves were recorded. At the end of each crop station, three bunches per plant of each plot were evaluated for the fresh biomass of the bunches, length and width of the bunches, soluble solids content, pH, number of bunches per plant, production, and productivity. It was concluded that the plastic cover associated with the environmental conditions, and phytosanitary management can favor the physical-chemical quality and reduce the severity of the mildew in the Niagara Rosada variety providing greater production and productivity. The use of defoliation does not favor the cultivation of this variety in southwestern Paraná.

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“…Com a poda verde foram removidas todas as folhas abaixo da inserção do primeiro cacho do ramo. Esse nível de desfolha vem sendo adotado nos trabalhos de autores como Anzanello et al (2011) e Mandelli et al (2008.…”

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Efeito da época de poda e da desfolha na interceptação de radiação solar na videira Bordô

et al. 2013

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ResumoO presente trabalho teve por objetivo determinar a influência da desfolha e da época da poda seca sobre o albedo e sobre a radiação solar disponível ao nível dos cachos e determinar o efeito da radiação solar sobre o acúmulo de sólidos solúveis da videira. Foram realizadas duas épocas de poda seca e a desfolha em parte do vinhedo da cultivar Bordô conduzida no sistema pérgula. A radiação solar foi medida utilizando-se tubos solarímetros instalados em cada tratamento, sendo o teor de sólidos solúveis determinado no momento da colheita, com um refratômetro de campo. A realização da poda seca exerceu influência sobre o albedo, sendo que o maior albedo da videira Bordô é observado quando a poda seca ocorreu na época normal (meados de setembro) e sem desfolha. Para o período compreendido entre a poda e a desfolha, o albedo variou entre 0,28 e 0,30. Os resultados demonstram que o adiamento da poda seca representa redução na quantidade de radiação solar disponível ao nível dos cachos, ao mesmo tempo em que a realização da desfolha propicia aumento na radiação que incide ao nível dos cachos. O acúmulo de sólidos solúveis está relacionado com a radiação solar disponível ao nível dos cachos.Palavras-chave: sólidos solúveis totais, desfolha, sistema de condução latada, balanço de ondas curtas. Effect of pruning time and defoliation on solar radiation interception in Bordô grapevines AbstractIn this study, we aimed to evaluate the influence of defoliation and dry pruning time on the albedo and solar radiation available at the level of clusters and to determine the effect of the latter on the accumulation of soluble solids in grapevines. Two periods of dry pruning and defoliation in part of a Bordô cultivar vineyard grown in pergola system were carried out. Solar radiation was measured using solar meter tubes installed for each treatment. The soluble solids content was determined at harvest using a field refractometer. The dry pruning exerted influence on the albedo, while the highest albedo of the Bordô vine was observed when the dry pruning occurred in the normal season (mid-September) and without defoliation. The albedo ranged from 0.28 to 0.30 during the defoliation period. The results showed that a delay of the dry pruning represents a reduction in the amount of solar radiation available at the grape clusters, while defoliation provides an increase in the incident radiation at the level of clusters. The accumulation of soluble solids is related to the solar radiation available at the level of clusters -the higher the radiation available, the higher the accumulation of soluble solids.Key words: total soluble solids, defoliation, conduction system trellis, balance shortwave.A quantidade de radiação solar que penetra no dossel vegetativo é de grande importância para a videira, pois além de influenciar o desenvolvimento da planta e a síntese de compostos orgânicos, melhora a produção e a qualidade da uva (Mandelli et al., 2008;Smart, 1985). Em razão das características inerentes a cada sistema de condução da videira, ...

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Desfolha em videiras americanas e viníferas na fase de pré-maturação dos frutos

Abstract: RESUMO Foram avaliadas possíveis interferências que a localização da folha removida mediante desfolha em videira apresenta sobre o rendimento e qualidade dos frutos. As cultivares 'Niagara Branca' e 'Concord',

Cited by 4 publications

References 4 publications

Defoliation levels on gas exchange and composition of grape clusters cv. Italia

Defoliation levels on gas exchange and composition of grape clusters cv. Italia

Fruit quality and occurrence of mildew in Niagara Rosada grown under plastic cover and defoliation rates

Efeito da época de poda e da desfolha na interceptação de radiação solar na videira Bordô

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