Effect of Timing of Root Pruning and Root Iba Application on Leaf Mineral Concentration and Canopy Light Interception of 'Cox's' Orange Pippin' Apple Trees

Retamales, Jorge B.; Hipps, N. A.; Atkinson, Chris

doi:10.17660/actahortic.2004.636.5

Cited by 3 publications

(2 citation statements)

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“…Other authors have generally applied RP during or close to full bloom (Elfving et al, 1991(Elfving et al, ,1996Schupp 1992;Ferree, 1994Ferree, , 1996and Autio and Greene, 1994), without negatively influencing fruit set. Retamales et al (2004) confirmed that RP near bloom time has the greatest effects. Schupp and Ferree (1987), comparing RP in dormant trees, at full bloom, at June drop, and preharvest, obtained reduced shoot growth only at the two early RPs but did not affect vegetative growth if applied at June drop or later.…”

Section: Mode Of Root Pruningmentioning

confidence: 61%

Root Pruning—A Poorly Understood Management Practice in Fruit Trees

Saure¹

2007

International Journal of Fruit Science

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Root pruning (RP) is a management practice intended to reduce excessive shoot growth resulting from a disturbed root/shoot-balance. It appears to function by limiting the gibberellin activity in fruit trees by interfering with endogenous growth control. In this way, not only shoot growth but also fruit development and flower-bud formation can be influenced by one common mechanism. The results are contradictory and often unpredictable. The prospects of RP as a management practice are rather limited.

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Section: Mode Of Root Pruningmentioning

confidence: 61%

Root Pruning—A Poorly Understood Management Practice in Fruit Trees

Saure¹

2007

International Journal of Fruit Science

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“…Root pruning produces inevitable damage to root and the length of time required to replace the root system mainly depends on species, mode, timing, soil condition, health-state of the tree, etc. [Retamales et al 2004]. Often, 3 to 5 years is required to reach 100 percent of the original spread and surface area.…”

Section: Introductionmentioning

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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Root pruning - a growth regulation practice in fruit crops

2021

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Root pruning is a horticultural practice from ages ago that has potential benefits on tree crop growth regulation and production. It is followed in orchards as a growth control mechanism of vigorously growing fruit trees. The growth regulation in trees is brought about by many physiological mechanisms involving water stress and assimilates partitioning to maintain the root: shoot equilibrium. Root pruning of structural roots increases the function and efficiency of functional roots in trees. It is widely practiced in transplanting of saplings which ensures better establishment. Time and selection of the distance from the trunk by root pruning may play an important role not only on vigour control but also on vegetative response and flower induction, fruit set; hence, they should be addressed as well. However, it will require additional experience, horticultural insight and better understanding of the physiological basis of the technique. It favours the large-scale adoption of root pruning in perennial fruit crops under high-density planting system in order to regulate the canopy size and regular bearing.

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Effect of Timing of Root Pruning and Root Iba Application on Leaf Mineral Concentration and Canopy Light Interception of 'Cox's' Orange Pippin' Apple Trees

Cited by 3 publications

References 0 publications

Root Pruning—A Poorly Understood Management Practice in Fruit Trees

Root Pruning—A Poorly Understood Management Practice in Fruit Trees

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

Root pruning - a growth regulation practice in fruit crops

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