The Influence of Nitrogen Fertilization on Onion Quality and Storage

Sypien, M.; Smoter, J.; Kepkowa, A.; Nowosielski, O.

doi:10.17660/actahortic.1973.29.26

Acta Hortic.

1973

DOI: 10.17660/actahortic.1973.29.26

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The Influence of Nitrogen Fertilization on Onion Quality and Storage

M. Sypien¹,

J. Smoter²,

A. Kepkowa³

et al.

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Cited by 5 publications

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“…Optimum N supply is necessary for maximum onion production and performance (Brewster and Butler, 1989;Brown et al, 1988;Hassan, 1977;Smittle, 1984;Vavrina and Granberry, 1988). Excessive N applied late, however, can limit yields (Riekels, 1972;Sypien et al, 1973) and increase storage losses (Vaughan et al, 1964;Walz and Burr, 1977), while inadequate N can hasten maturity and limit yields (Scully et al, 1945). The effect of N form on onion production, however, has received no attention.…”

mentioning

confidence: 99%

Onion Plant Growth, Bulb Quality, and Water Uptake following Ammonium and Nitrate Nutrition

Gamiely¹,

Randle²,

Mills³

et al. 1991

HortSci

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Nitrogen applied as NH4-N or NO3-N (75 mg·liter-1) affected onion (AIlium cepa L.) plant growth when grown in solution culture. Nitrate alone or in combination with NH4-N increased leaf fresh and dry weight, leaf area, root fresh and dry weight, and bulb dry weight when compared to growth with NH4-N as the sole N source. Bulb fresh weight was highest with an NH4-N: NO3-N ratio between 1:3 and 3:1. Maximum leaf fresh weight was not necessary to produce maximum bulb fresh weight when onions were subjected to different N-form ratios. Precocious bulbing resulted when NH4-N was the sole N source; however, high bulbing ratios early in plant development were not correlated with final bulb fresh weight. Nitrogen form also influenced water uptake and pungency, as measured by enzymatically developed pyruvate concentration, but did not affect bulb sugar concentration.

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mentioning

confidence: 99%

Onion Plant Growth, Bulb Quality, and Water Uptake following Ammonium and Nitrate Nutrition

Gamiely¹,

Randle²,

Mills³

et al. 1991

HortSci

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show abstract

“…Adequate nitrogen (N) supply is necessary for maximum onion production (5,7), yet excessive N broadcast and shallowly incorporated as a preplant treatment can reduce stands (8 , 9, 18) and yield (15,18). Excessive N applied during the season can contribute to storage losses of onions when maturity is delayed and onions are not permitted to mature (field-cure) adequately (21,24).…”

mentioning

confidence: 99%

Sulfur-coated Urea as a Slow-release Nitrogen Source for Onions

Brown

Hornbacher

Naylor

1988

J. Amer. Soc. Hort. Sci.

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Field studies with onions (Allium cepa L. cv Monarch) were conducted in 1980 and 1981 to compare preplant-banded sulfur-coated urea (SCU) with preplant-banded and split applications of urea. Treatments were evaluated at two N rates, 56 and 224 kg·ha−1. Root NO3-N and soil NO3-N concentrations in bed centers indicated slower release of N from SCU than from urea. Nevertheless, total and large bulb (> 76 mm in diameter) yields and N uptake in onion bulbs and leaves from SCU were significantly higher under low-N conditions than with preplant urea, but did not differ significantly from split urea treatments.

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Ammonium nitrate fertility levels influence flavour development in hydroponically grown ‘Granex 33’ onion

Coolong

Randle

2003

J Sci Food Agric

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High levels of nitrogen (N) fertility have been shown to influence bulb flavour characteristics in onion (Allium cepa L). To test the effects of lower levels of N fertility on onion bulb flavour, 'Granex 33' onions were grown hydroponically in a greenhouse with varying solution N levels. Eleven levels were tested by increasing the concentration of NH 4 NO 3 in solutions from 20 to 140 mg l −1 N. Mature plants were harvested and evaluated for plant leaf and bulb fresh weights (FWs), bulb soluble solids content (SSC), bulb total pyruvic acid, bulb total sulphur (S), and bulb sulphate (SO 4 2− ). To determine the effect of N on the flavour biosynthetic pathway of onion, total and individual S-alk(en)yl cysteine sulphoxides and related peptide intermediates were also tested. Leaf and bulb FWs responded quadratically to N concentration, as did total bulb S. Bulb SO 4 2− and SSC, though significantly influenced by N concentration, did not respond with a meaningful trend. Bulb pyruvic acid increased linearly with N level increases, as did (+)-S-propyl-L-cysteine sulphoxide. Total precursors, (+)-S-methyl-Lcysteine sulphoxide, and trans-(+)-S-1-propenyl-L-cysteine sulphoxide responded quadratically to N levels. At lower N levels, trans-(+)-S-1-propenyl-L-cysteine sulphoxide content was highest relative to the other precursors. However, at elevated N levels, (+)-S-methyl-L-cysteine sulphoxide accumulated in the highest concentrations. Peptide intermediates 2-carboxypropyl glutathione and γ -glutamyl propenyl cysteine sulphoxide responded linearly and quadratically respectively to increasing N fertility levels. Nitrogen fertility levels can influence flavour intensity and quality and should be considered when growing onions for flavour attributes.

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The Influence of Nitrogen Fertilization on Onion Quality and Storage

Cited by 5 publications

References 0 publications

Onion Plant Growth, Bulb Quality, and Water Uptake following Ammonium and Nitrate Nutrition

Onion Plant Growth, Bulb Quality, and Water Uptake following Ammonium and Nitrate Nutrition

Sulfur-coated Urea as a Slow-release Nitrogen Source for Onions

Ammonium nitrate fertility levels influence flavour development in hydroponically grown ‘Granex 33’ onion

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