Crop Load Interactions in Apple

Wünsche, J.; Ferguson, Ian B.

doi:10.1002/9780470650882.ch5

Cited by 64 publications

(80 citation statements)

References 236 publications

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“…Apple growth is also strongly influenced by sink competition, including shoots and other fruit as has been widely documented (Corelli-Grappadelli, 2003;Wünsche and Ferguson, 2005). In the present study crop load was standardized for all treatments and no differences in the final crop load parameters were observed (Table 2), so no effects by fruit competition should be expected.…”

Section: Discussionsupporting

confidence: 59%

Exploring the Potential use of Photo-Selective Nets for Fruit Growth Regulation in Apple

Bastías

Manfrini

Grappadelli

2012

Chilean J. Agric. Res.

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The effect of shading (i.e. reduction of sunlight availability) on fruit growth physiology has been widely studied in apple (Malus domestica Borkh.), but little knowledge exist about fruit growth responses to changes in the light spectrum. The aim of the present research was to study the effect of use of colored nets with differential sunlight transmission in the blue (B, 400-500 nm), red (R, 600-700 nm) and far-red (FR, 700-800 nm) spectra on apple fruit growth and physiological associated responses. Three year old 'Fuji' apple trees were covered with 40% photo-selective blue and red shade nets, 40% neutral grey shade net, and 20% neutral white net as control. Red and blue net reduced in the same proportion (27%) the photosynthetically active radiation with respect to control. However, blue net increased by 30% and reduced by 10% the B:R and R:FR the light relations, respectively. Maximal fruit growth rate under blue and grey nets was 15-20% greater than control. Fruit weight under blue net was 17% greater than control, but no significant differences in fruit weight were found among red net and control. Leaf photosynthesis and total leaf area under blue net were 28% and 30% higher than control, respectively; with ensuing positive effect on tree net C assimilation rate and total dry matter production. Results suggest that shifting the B, R, and FR light composition with photo-selective nets could be a useful tool to manipulate the photosynthetic and morphogenetic process regulating the carbohydrate availability for apple fruit growth.

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Section: Discussionsupporting

confidence: 59%

Exploring the Potential use of Photo-Selective Nets for Fruit Growth Regulation in Apple

Bastías

Manfrini

Grappadelli

2012

Chilean J. Agric. Res.

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“…A relatively high pH value in the fruit was observed in the high cropping years which can be attributed to delayed fruit ripening. High yield ('on-year') extends maturity (Wünsche and Ferguson, 2004). Fruit weight correlated negatively with fruit flesh firmness.…”

Section: Data Collectionmentioning

confidence: 97%

A New Insight into Pruning Strategy in the Biennial Cycle of Fruiting: Vegetative Growth at Shoot and Whole-tree Level, Yield and Fruit Quality of Apple

Atay

2017

Not Bot Horti Agrobo

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Knowledge of the growth dynamics of young and mature trees contributes to development of efficient orchard management practices. In this experiment, the aim was to provide apple growers with practical information on how vegetative growth (at both shoot and whole-tree level), yield and fruit quality change during the transition period, from young to mature trees. The experiment orchard was planted at 3.5 m × 1 m inter-row and intra-row spacings, respectively, with 'Golden Delicious'/M.9 trees. Trees were trained since planting as modified vertical axis. Vegetative growth at shoot level reacted differently to yield load than that at the whole-tree level. The yield, yield efficiency and annual canopy volume increase and decrease (a vegetative growth indicator at the whole-tree level) showed a positive correlation with shoot length. TCSA (annual increase and actual TCSA), as another vegetative growth indicator at whole-tree level in the experiment, correlated negatively with shoot length. The yield varied biennially and, was greatest in the seventh year after planting (21.76±8.46 kg tree -1 , corresponding to an orchard yield of ~62 t ha -1 ) that is an acceptable tonnage in the region of the experiment. To maintain the balance between vegetative growth and fruiting, orchard management practices should be conducted considering yield. No pruning or light pruning is recommended in the 'off-year' of biennial cycle of fruiting as a result of this study.

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“…Entretanto, elas podem ser influenciadas pelas condições meteorológicas e pelas práticas culturais adotadas no pomar, como poda, raleio, aplicação de reguladores de crescimento, adubação e controle de pragas e doenças (TROMP, 2000;LAKSO, 2000;FERGuSON, 2005;BuKOVAC et al, 2006).…”

Section: Introductionunclassified

Precocidade De Produção De Cultivares De Macieira Sobre Dois Porta-Enxertos

Fioravanço

2015

Rev. Bras. Frutic.

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RESUMO Em ensaios de competição, muitos fatores são avaliados visando a diferenciar as cultivares e a proceder à recomendação de uso. Em relação ao desempenho produtivo, cultivares que entram em produção precocemente, produzem regularmente ao longo dos anos e, ao final, apresentam produções superiores, destacam-se em relação às demais. Desta forma, o trabalho foi realizado com o objetivo de avaliar a precocidade de produção, por meio da aplicação do índice de precocidade de produção, e a produção acumulada de nove cultivares de macieira enxertadas sobre dois porta-enxertos, durante as seis primeiras safras. Os mais elevados índices de precocidade de produção foram exibidos pelas cultivares Daiane, Mishima e Fuji Select no porta-enxerto M-9, e pelas cultivares Fuji Suprema, Daiane e Gala Real no porta-enxerto Marubakaido/M-9. Ao final das seis safras, ‘Baigent’ e ‘Cripps Pink’, no porta-enxerto M-9, e ‘Maxi-Gala’, ‘Baigent’, ‘Daiane’, ‘Gala Real’ e ‘Royal Gala’, no Marubakaido/M-9, apresentaram as maiores produções acumuladas. Somente ‘Daiane’ e ‘Gala Real’, sobre a combinação Marubakaido/M-9, destacaram-se para as variáveis índice de precocidade de produção e produção acumulada, simultaneamente. O índice de precocidade de produção é um parâmetro importante para, junto com outros fatores, como a produção e a qualidade dos frutos, diferenciar cultivares de macieira.

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Crop Load Interactions in Apple

Cited by 64 publications

References 236 publications

Exploring the Potential use of Photo-Selective Nets for Fruit Growth Regulation in Apple

Exploring the Potential use of Photo-Selective Nets for Fruit Growth Regulation in Apple

A New Insight into Pruning Strategy in the Biennial Cycle of Fruiting: Vegetative Growth at Shoot and Whole-tree Level, Yield and Fruit Quality of Apple

Precocidade De Produção De Cultivares De Macieira Sobre Dois Porta-Enxertos

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