Disponibilidade de luz em macieiras 'Fuji' cobertas com telas antigranizo e seus efeitos sobre a fotossíntese, o rendimento e a qualidade dos frutos

Amarante, Cassandro Vidal Talamini do; Steffens, Cristiano André; Miqueloto, Aquidauana; Zanardi, Odimar Zanuzo; Santos, Henrique Pessoa dos

doi:10.1590/s0100-29452009000300007

Cited by 27 publications

(28 citation statements)

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“…Guerrero-Prieto et al (2010), Smit (2007), and Dussi et al (2005) concluded that use of a black net does not change the fruit color. However, other studies report that there is a reduction in the fruit color when grown under a net compared to those grown under the open sky (Solomakhin and Blanke 2010b; When F calculated has a value greater than F critical , there is a significant difference between the environments, p=5 % probability of error DF degrees of freedom, MS mean square Amarante et al 2009Amarante et al , 2007Jakopic et al 2007;Iglesias and Alegre 2006;Dussi et al 2005;Stampar et al 2002;Leite et al 2002). In these studies, different cultivars were used, and the fruits under the net were harvested on the same day as those under the open sky, clearly demonstrating the differences between environments.…”

Section: Discussionmentioning

confidence: 97%

“…Leite et al (2002) also observed a lower incidence of russeting on apples cultivated under nets, with no changes in the soluble solids, acidity, starch, or pulp firmness. However, Amarante et al (2007Amarante et al ( , 2009 observed that the cover did not influence the occurrence of russeting on apples.…”

Section: Introductionmentioning

confidence: 95%

“…However, there have been only a few studies on the effect and efficiency of this technique on apple trees in Brazil. Studies conducted by Leite et al (2002) and Amarante et al (2007Amarante et al ( , 2009Amarante et al ( , 2011 in southern Brazil showed that anti-hail nets reduce the color intensity of fruits. Leite et al (2002) also observed a lower incidence of russeting on apples cultivated under nets, with no changes in the soluble solids, acidity, starch, or pulp firmness.…”

Section: Introductionmentioning

confidence: 99%

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Apple production and quality when cultivated under anti-hail cover in Southern Brazil

et al. 2014

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Anti-hail nets may change the microclimate of orchards and hence modify the physicochemical and sensory characteristics of fruits. The present study aimed to evaluate the effects of anti-hail nets on the physical, chemical, and sensory attributes of apples grown in southern Brazil. The study was conducted in commercial orchards, with apples grown under a black anti-hail net under an open sky during the 2008/2009, 2009/2010, and 2010/2011 cycles. Measurements of photosynthetically active radiation were collected at both sites. Physical, chemical, and sensory analyses of fruits were performed in the laboratory. The anti-hail net reduced incident photosynthetically active radiation by 32%. The light spectrum in the canopy changed the corresponding R/FR (red/far-red) ratio in the lower and upper canopy layers from 0.27 to 1.55, respectively. In contrast to the majority of microclimate studies carried out in the temperate zones of the northern hemisphere, this study in the southern hemisphere showed that although it reduced the incident solar radiation, the cover did not change the color or organoleptic characteristics of "Royal Gala" and "Fuji Suprema" apples. The net cover prolonged the subperiod between fruit setting and harvesting, thus slowing fruit ripening. Therefore, the use of anti-hail nets on apple orchards is a suitable alternative for the protection of apple trees against hail because it causes only small changes in the microclimate and in the maturation period, ensuring fruit production without affecting its quality.

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Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Apple production and quality when cultivated under anti-hail cover in Southern Brazil

et al. 2014

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“…A PCV foi determinada por meio de análise subjetiva da superfície com coloração vermelha nos frutos (Amarante et al, 2009b). A determinação do ângulo 'hue' (h°) da epiderme foi realizada com colorímetro modelo CR 400 (Minolta, Osaka, Japão), e as leituras foram feitas em dois lados do fruto.…”

Section: Methodsunclassified

Atributos fisiológicos, físico-químicos e minerais associados à ocorrência de "bitter pit" em maçãs

Miqueloto

Amarante

Steffens

et al. 2011

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi identificar os atributos fisiológicos, físico-químicos e minerais associados à ocorrência pós-colheita de "bitter pit" em maçãs 'Fuji' e 'Catarina'. Os frutos foram colhidos, armazenados por 120 dias a 1°C, com 90-95% de umidade relativa e, em seguida, divididos em lotes com ou sem sintoma de "bitter pit". Maçãs 'Catarina' apresentaram maior incidência e severidade de "bitter pit", em comparação a 'Fuji'. Em ambas as cultivares, os frutos com "bitter pit" apresentaram maior produção de etileno, respiração e acidez titulável, e menor pH, firmeza de polpa, textura da casca e da polpa e percentagem de cor vermelha na casca. Os frutos com "bitter pit" também apresentaram menores teores de Ca e maiores valores das relações K/Ca, N/Ca, (K+Mg)/Ca e (K+Mg+N)/Ca nos tecidos da casca e da polpa da região pistilar. A análise canônica discriminante indica que os atributos mais adequados para discriminar frutos com e sem "bitter pit" são força para penetração na polpa e relação K/Ca na polpa, em maçãs 'Fuji', e acidez titulável e relação K/Ca na casca, em maçãs 'Catarina'.Termos para indexação: Malus domestica, análise canônica discriminante, distúrbio fisiológico, estado nutricional, deficiência de cálcio, pós-colheita. Physiological, physicochemical and mineral attributes associated with the occurrence of bitter pit in applesAbstract -The objective of this work was to identify the physiological, physicochemical, and mineral attributes associated with the occurrence of bitter pit in 'Fuji' and 'Catarina' apples. Fruit were harvested, stored in air at 1°C and 90-95% relative humidity for 120 days, and, then, divided into lots with or without bitter pit symptoms. 'Catarina' apples had higher incidence and severity of bitter pit, in comparison to 'Fuji'. In both cultivars, fruit with bitter pit had higher ethylene production, respiration, and titratable acidity, and lower pH, flesh firmness, skin and pulp textures, and percentage of red skin area. Fruit with bitter pit also had lower Ca content and higher values of K/Ca, N/Ca, (K+Mg)/Ca, and (K+Mg +N)/Ca ratios in the skin and flesh tissues of the blossom-end. Canonical discriminant analysis indicates that the best attributes to discriminate between fruit with or without bitter pit are force to penetrate the flesh and K/Ca ratio in the pulp, in 'Fuji' apples, and titratable acidity and K/Ca ratio in the skin, in 'Catarina' apples.

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“…Estes tipos de cobertura vêm sendo cada vez mais utilizados, e suas influências no microclima vêm sendo e devem ser estudadas, inclusive em frutíferas de clima temperado, como telas antigranizo em macieiras (LEITE et al, 2002;AMARANTE et al, 2009;CARDOSO et al, 2009;e BOSCO et al, 2010) e coberturas plásticas em vinhedos (CARDOSO et al, 2010;CHAVARRIA et al, 2007;CHAVARRIA et al, 2008;CHAVARRIA et al, 2009). Quanto ao efeito sobre o microclima, da utilização de cobertura plástica para diferentes culturas, os estudos estão sendo difundidos.…”

Section: Introductionunclassified

Duração do período de molhamento foliar em pomares de macieira em céu aberto e sob tela antigranizo, em Vacaria-RS

Paula¹,

Bergamaschi

Ponte

et al. 2012

Rev. Bras. Frutic.

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RESUMO -A duração do período de molhamento foliar (DPM) é um importante parâmetro para a determinação do risco de doenças da macieira, especialmente a sarna, principal doença da cultura. O clima regional e as características de implantação e manejo de pomares são fatores determinantes da ocorrência do molhamento foliar. Em função do microclima do dossel, é necessário conhecer a posição com maior DPM, para dar suporte a modelos de previsão de doenças. Poucos trabalhos avaliaram a DPM em pomares de macieira, sendo que inexistem estudos nas condições de cultivo do Sul do Brasil, em particular na região produtora de Vacaria, Rio Grande do Sul. Este trabalho objetivou caracterizar a variação espacial da DPM em dosséis de macieiras em céu aberto e sob tela antigranizo, na região de Vacaria. O experimento foi desenvolvido em pomares de macieiras 'Royal Gala', conduzidos em líder central com apoio (espaçamento de 1m x 3m), sendo um coberto por tela antigranizo e o outro em céu aberto. A DPM foi monitorada nos estratos superior, médio e inferior dos dosséis de macieira. A duração do molhamento foliar foi superior no estrato inferior do dossel, tanto em céu aberto quanto sob tela antigranizo. Houve tendência de mais alta DPM no pomar coberto para todos os estratos do dossel, com diferença significativa entre ambientes nos estratos superior e médio. Os valores de DPM foram mais similares entre os estratos no dossel coberto por tela antigranizo do que no dossel a céu aberto. Termos para indexação: Malus domestica, doenças, microclima, orvalho. LEAF WETNESS DURATION IN APPLE ORCHARDS IN OPEN SKY AND UNDER HAIL NET COVER, IN VACARIA, BRAZILABSTRACT -The leaf wetness duration (LWD) is an important parameter to monitor the epidemiology of apple diseases, like apple scab, the most common disease of the crop. The regional climate and management conditions of the orchards are determinant factors for the occurrence of leaf wetness. And, depending on the canopy microclimate it is important to know the position with greater LWD, for use in forecasting models of disease. Few studies have evaluated LWD on apple orchards and none in the cropping conditions of southern Brazil, particularly in the producing region of Vacaria, in the state of Rio Grande do Sul, Brazil. This study aimed to characterize the spatial variation of LWD in canopies of apple trees in open sky and under hail net covering, in Vacaria, Brazil. The experiment was carried out in orchards of 'Royal Gala' apple cultivars, conducted in central leader with support (spacing 1m x 3m), being one in open sky and other under hail net. The LWD was monitored in the upper, middle and lower strata of the plant canopy. The LWD was higher in the lower part of the canopy in both apple orchards. Tendency to greater LWD in the covered orchard was observed for all strata of the canopy, with significant differences for the upper and middle strata of canopies. LWD values were more similar between portions of the canopy under hail net than in the open sky.

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Disponibilidade de luz em macieiras 'Fuji' cobertas com telas antigranizo e seus efeitos sobre a fotossíntese, o rendimento e a qualidade dos frutos

Cited by 27 publications

References 7 publications

Apple production and quality when cultivated under anti-hail cover in Southern Brazil

Apple production and quality when cultivated under anti-hail cover in Southern Brazil

Atributos fisiológicos, físico-químicos e minerais associados à ocorrência de "bitter pit" em maçãs

Duração do período de molhamento foliar em pomares de macieira em céu aberto e sob tela antigranizo, em Vacaria-RS

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