Effect of Summer Pruning Treatments of Vigorous Apple Trees on the Nutrient Contents of Foliage and Fruits

Bünemann, G.; Struklec, A.

doi:10.1016/b978-0-408-10662-7.50030-2

Cited by 5 publications

(2 citation statements)

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“…Pruning in late June to early July increases flower bud for mation more effectively than late pruning (4). In this investi gation, August summer pruning had no influence on total flower bud formation.…”

Section: Discussionmentioning

confidence: 55%

Effects of Dormant Pruning, Summer Pruning, Scoring, and Growth Regulators on Growth, Yield, and Fruit Quality of ‘Delicious’ and ‘Cortland’ Apple Trees

Greene

Lord

1983

J. Amer. Soc. Hort. Sci.

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Summer pruning 6-year-old trees of ‘Cortland’ apple (Malus domestica Borkh.) for 3 consecutive years in either early July or early August reduced trunk circumference increase the year of pruning and increased terminal growth the following year. Terminal growth on 8-year-old ‘Red Prince Delicious’ trees summer-pruned in August for 3 consecutive years was similar to dormant-pruned trees, and trunk circumference increase was reduced the last 2 years. Fruit size and soluble solids were reduced the last 2 years. Fruit size and soluble solids were reduced by summer pruning ‘Cortland’ but not ‘Red Prince’. Flowering, fruit set, yield, flesh firmness, flesh calcium, and storage disorders were not affected by summer pruning of either cultivar. Terminal growth of ‘Cortland’ trees was reduced the year of scoring and the following year. Bloom was increased the year following scoring. Scoring ‘Red Prince’ for 3 consecutive years consistently reduced terminal growth and increased yield the second and third years. Corrective dormant pruning (CDP) on ‘Red Prince’ reduced bloom but not yield the first year. In the 2 subsequent years, bloom, fruit set, and yield were not affected by CDP and the practice alleviated the problem of tree crowding. Summer pruning on ‘Cortland’ trees followed by a postbloom spray of butanedioic acid mono(2,2-dimethyl hydrazide) (daminozide) of 1500 ppm showed promise as a way to control tree growth, increase flower bud formation, and fruit set.

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Section: Discussionmentioning

confidence: 55%

Effects of Dormant Pruning, Summer Pruning, Scoring, and Growth Regulators on Growth, Yield, and Fruit Quality of ‘Delicious’ and ‘Cortland’ Apple Trees

Greene

Lord

1983

J. Amer. Soc. Hort. Sci.

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“…Perring and Preston (15) found increased Ca in apple fruit in response to summer pruning. Fluctuations of K (2) and Ca (2,12,13) but the fluctuations were not consistent from season to season. Little additional information about the effect of summer pruning on mineral nutrition exists.…”

mentioning

confidence: 89%

The Influence of Summer Pruning and Fruit Cropping on the Carbohydrate, Nitrogen, and Nutrient Composition of Apple Trees

Taylor

Ferree

1986

J. Amer. Soc. Hort. Sci.

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Traditionally, the size control achieved in summer-pruned apple (Malus domestica Borkh.) trees has been attributed to the removal of shoot leaf area before it could replace the storage carbohydrate depleted during its initial growth. Therefore, tissues of young Top Red ‘Delicious’/M 9 trees grown in pots, and mature, field-grown ‘Jonathan’/M 26 trees were summer-pruned and subsequently analyzed for carbohydrate and nutrient element content. Increasing the severity of summer pruning (the length of shoot removed) did not affect the concentration of water-soluble reducing sugars (SRS) or insoluble hydrolyzable carbohydrates (IHC) in the basal shoot section of the Top Red ‘Delicious’/M 9 trees 11 weeks after pruning. Summer pruning 1) increased leaf SRS, N, K, B and stem IHC and 2) decreased leaf Ca and Mg in shoot regrowth. Levels of Fe, Ca, Zn, Al, and Na in the leaves of regrowth were not affected by summer pruning. There was no significant effect of pruning on SRS or IHC levels in the roots. A separation of the carbohydrates by gas chromatography revealed increasing glucose and fructose concentrations in the roots as pruning severity increased, but sorbitol, sucrose, and phloridzin concentrations in roots were not significantly affected. Neither previous season’s summer pruning nor fruit cropping of ‘Jonathan’/M 26 trees affected SRS or IHC of spur shoots in March or June, except that presence of fruit reduced IHC of spur leaves in June. SRS levels in roots in June were reduced by the previous year’s cropping, but not influenced by summer pruning. Root IHC was not influenced by either pruning or cropping treatments. Spur leaf N, Ca, Mg, Mn, and Al were reduced on defruited trees, with K, Ca, Mn, and Al generally being increased by summer pruning. Pruning and cropping treatments generally did not affect levels of P, Fe, B, Cu, Zn, or Na in spur leaves in June; but summer pruning increased K concentration in harvested fruit.

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Physiological Responses of Fruit Trees to Pruning

Mika

1986

Horticultural Reviews

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Effect of Summer Pruning Treatments of Vigorous Apple Trees on the Nutrient Contents of Foliage and Fruits

Cited by 5 publications

References 0 publications

Effects of Dormant Pruning, Summer Pruning, Scoring, and Growth Regulators on Growth, Yield, and Fruit Quality of ‘Delicious’ and ‘Cortland’ Apple Trees

Effects of Dormant Pruning, Summer Pruning, Scoring, and Growth Regulators on Growth, Yield, and Fruit Quality of ‘Delicious’ and ‘Cortland’ Apple Trees

The Influence of Summer Pruning and Fruit Cropping on the Carbohydrate, Nitrogen, and Nutrient Composition of Apple Trees

Physiological Responses of Fruit Trees to Pruning

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