Light penetration, growth, and fruit productivity in ‘Fuji’ apple trees trained to four growing systems

Jung, Seok-Kyu; Choi, Hyun-Sug

doi:10.1016/j.scienta.2010.05.027

Cited by 44 publications

(31 citation statements)

References 15 publications

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“…The present season's growing conditions have a smaller impact compared to annual crops, as the amount of fruit buds (i.e., production potential) is influenced by crop load [45] and the plants' water status [27,39,46] of the previous growing season [1]. The correlation between production variables and vegetation indices most likely stemmed from the association with vegetative growth and the relationship between vegetative growth, water status and production [14,47,48]. Trees with more vegetative growth produced less flower buds (i.e., decreased number of fruits and total yields), as a result of the considerable consumption of water from excessive vegetative growth [47].…”

Section: Potential and Limitationsmentioning

confidence: 99%

Temporal Dependency of Yield and Quality Estimation through Spectral Vegetation Indices in Pear Orchards

et al. 2015

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Yield and quality estimations provide vital information to fruit growers, yet require accurate monitoring throughout the growing season. To this end, the temporal dependency of fruit yield and quality estimations through spectral vegetation indices was investigated in irrigated and rainfed pear orchards. Both orchards were monitored throughout three consecutive growing seasons, including spectral measurements (i.e., hyperspectral canopy reflectance measurements) as well as yield determination (i.e., total yield and number of fruits per tree) and quality assessment (i.e., fruit firmness, total soluble solids and fruit color). The results illustrated a clear association between spectral vegetation indices and both fruit yield and fruit quality (|r| > 0.75; p < 0.001). However, the correlations between vegetation indices and production variables varied throughout the growing season, depending on the phenological stage of fruit development. In the irrigated orchard, index values showed a strong association with production variables near time of OPEN ACCESSRemote Sens. 2015, 7 9887 harvest (|r| > 0.6; p < 0.001), while in the rainfed orchard, index values acquired during vegetative growth periods presented stronger correlations with fruit parameters (|r| > 0.6; p < 0.001). The improved planning of remote sensing missions during (rainfed orchards) and after (irrigated orchards) vegetative growth periods could enable growers to more accurately predict production outcomes and improve the production process.

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Section: Potential and Limitationsmentioning

confidence: 99%

Temporal Dependency of Yield and Quality Estimation through Spectral Vegetation Indices in Pear Orchards

et al. 2015

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“…Although severe shoot pruning was performed, weaken vigor of control plant gave preference to apical dominances outside shoot tips and resulted in more shoots appeared in the outer canopy that thus prevented light penetration inwards. Light intensity had strong relationship with fruit yield, the insufficient light into control canopy decreased flower bud formation followed by fruit yield, which has been also reported in other apple orchards [Jung and Choi 2010]. Root pruning and shoot pruning could more inhibit shoot growth avoiding renewal heading in older apple trees [Saure 2007].…”

Section: Discussionmentioning

confidence: 65%

“…The yield per tree and fruit quality were measured in mid-October. Fruit quality was tested for the firmness with a GY-1 type fruit firmness meter, soluble solid content using a PR-gitalglucose meter and the titratable acid content by titration using 0.1 mol · L -1 NaOH [Jung and Choi 2010].…”

Section: Methodsmentioning

confidence: 99%

Rejuvenating Older Apple Trees by Root Pruning Combined With Arbuscular Mycorrhizal Fungi

Zhang

Liu

Zhang

et al. 2017

Acta Sci. Pol. Hortorum Cultus

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Older apple trees often demonstrate physiologically unreasonable shoot distribution due to root system aging, which results in lower fruit yield and poor fruit quality. Therefore this study was conducted to test whether root pruning combined with arbuscular mycorrhizal fungi could restore growth potential of fortyyear-old Red Fuji apple trees (Malus × domestica Borkh.) in a commercial orchard in 2013, by root pruning along both sides of rows, 80 cm from the trunk, to a depth of 30 cm and application of 100 ml arbuscular mycorrhizal inoculum per plant. Results showed that the percentage of root colonized by mycorrhizal fungi increased as root pruning was combined with arbuscular mycorrhizal fungi, however mycorrhizal colonization was not seen in the control roots and roots only by root pruning. For control tree total number of shoots decreased by 28.22% in 2015 than in 2013 and shoots mainly distributed in the outer canopy accounting for 58.10% of the total, which caused the lower light intensity inside the canopy, followed by lower fruit yield and poor fruit quality. Compared to control plant, shoot reduced by 33.96 and 38.51% in the outer canopy but increased by 97.99 and 123.69% in the inner canopy in 2015, as well as 390.20 and 478.43% in the vertical height of 1.5 to 2.5 m canopy, respectively treated by root pruning alone and combined with arbuscular mycorrhizal fungi. Root pruning alone and combined with arbuscular mycorrhizal fungi also raised the relative light intensity by 38.71 and 60.26% in the inner canopy in 2015, subsequent fruit yield by 315.79 and 373.68% respectively, in comparison to control plant. Shoot re-distribution improved fruit quality such as increase in firmness and soluble solid. Data indicated that the effect of root pruning combined with arbuscular mycorrhizal fungi on the rejuvenation of older apple trees was stronger than root pruning alone. It is therefore concluded that root pruning combined with arbuscular mycorrhizal fungi can think of as a measure to renew the older apple trees.

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“…Fruit TSSC values were highest in trees from the zero and three-split application plots, probably due to the higher light intensity inside the tree canopies. Fruit TSSC and fruit peel colour values were positively correlated with the extent of light penetration, which increased inner-canopy photosynthetic activities (Jung & Choi, 2010;Robinson et al, 1983). Fruit PCI values indicate skin colouration levels at maturity and were lowest in single application trees in 2009 (4.48) and 2010 (4.18), which may have been due to the lower light intensity inside the tree canopy.…”

Section: Fruit Production and Qualitymentioning

confidence: 99%

Effect of split applications of oil cake on leaf nutrient contents, tree growth, and fruit quality in non-astringent persimmon trees

Kim

Cho

et al. 2016

The Journal of Horticultural Science and Biotechnology

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Light penetration, growth, and fruit productivity in ‘Fuji’ apple trees trained to four growing systems

Cited by 44 publications

References 15 publications

Temporal Dependency of Yield and Quality Estimation through Spectral Vegetation Indices in Pear Orchards

Temporal Dependency of Yield and Quality Estimation through Spectral Vegetation Indices in Pear Orchards

Rejuvenating Older Apple Trees by Root Pruning Combined With Arbuscular Mycorrhizal Fungi

Effect of split applications of oil cake on leaf nutrient contents, tree growth, and fruit quality in non-astringent persimmon trees

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