Paper · 2025 · Scientia Horticulturae

Nitrogen enhances seed oil, tocopherols, seed yield, and seed quality in onion

Indrajitsingh Pravinsingh Girase; Prashant Kumar Rai; Vaidurya Pratap Sahi; et al.

5
claims
10
verbatim quotes
1
citations
2
research areas
✓
Open access · cc-by-nc-nd

Abstract

Nitrogen is an important nutrient known for enhancing biomass and grain yield. Nevertheless, the effect of varying nitrogen treatment rates on the tocopherol levels in onion seeds remains poorly understood. The purpose of this study was to ascertain how the different rates of nitrogen fertilization affected the seed yield, seed quality , oil content, and tocopherol content in onion seed. A field experiment was carried out for two years, i.e., 2020–21 and 2021–22. The onion seeds crop was fertilized with different nitrogen levels, i.e., 0 kg/ha, 50 kg/ha, 100 kg/ha, and 150 kg/ha. Nitrogen application had a significant effect on seed oil content and quality parameters like α, β, γ, δ and total tocopherol content. Further nitrogen applied at 100 kg/ha had a favourable effect on the seed yield and seed quality parameters. These results demonstrate that nitrogen fertilization improves both the quantity and seed oil and quality of onion seeds, highlighting its significance in enhancing onion seed yield and quality.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 5

Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Nitrogen application significantly affected onion seed oil content.

Taxon
onionAllium cepat0
Treatment
Nitrogen applicatione0
Outcome
seed oil contente0

Not reportedComparatorDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Nitrogen application had a significant effect on seed oil content and quality parameters like α, β, γ, δ and total tocopherol content.”

✓ located verbatim in the source · abstract, characters 587–721 · show in text ↑
t0

“onion”

✓ located verbatim in the source · title, characters 73–78 · show in text ↑
Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Nitrogen application significantly affected onion seed α, β and γ tocopherol content.

Taxon
onionAllium cepat0
Treatment
Nitrogen applicatione0
Outcome
α, β, γe0

Not reportedComparatorDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Nitrogen application had a significant effect on seed oil content and quality parameters like α, β, γ, δ and total tocopherol content.”

✓ located verbatim in the source · abstract, characters 587–721 · show in text ↑
t0

“onion”

✓ located verbatim in the source · title, characters 73–78 · show in text ↑
Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Nitrogen application significantly affected onion seed δ and total tocopherol content.

Taxon
onionAllium cepat0
Treatment
Nitrogen applicatione0
Outcome
δ and total tocopherol contente0

Not reportedComparatorDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Nitrogen application had a significant effect on seed oil content and quality parameters like α, β, γ, δ and total tocopherol content.”

✓ located verbatim in the source · abstract, characters 587–721 · show in text ↑
t0

“onion”

✓ located verbatim in the source · title, characters 73–78 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Nitrogen at 100 kg/ha favorably affected onion seed yield.

Taxon
onionAllium cepat0
Treatment
nitrogen applied at 100 kg/hae0
Outcome
seed yielde0

Not reportedComparatorDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“nitrogen applied at 100 kg/ha had a favourable effect on the seed yield and seed quality parameters.”

✓ located verbatim in the source · abstract, characters 730–830 · show in text ↑
t0

“onion”

✓ located verbatim in the source · title, characters 73–78 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Nitrogen at 100 kg/ha favorably affected onion seed quality.

Taxon
onionAllium cepat0
Treatment
nitrogen applied at 100 kg/hae0
Outcome
seed quality parameterse0

Not reportedComparatorDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“nitrogen applied at 100 kg/ha had a favourable effect on the seed yield and seed quality parameters.”

✓ located verbatim in the source · abstract, characters 730–830 · show in text ↑
t0

“onion”

✓ located verbatim in the source · title, characters 73–78 · show in text ↑

nitrogen · yield · Allium cepa (onion)Positive and negative results

184 papers: 157 positive, 27 negative or no effect

156 papers in the same direction as this paper · 23 in the opposite direction · 4 reporting no difference from an alternative

  1. negative
  2. negative
  3. negative

180 papers more in this group

See all 184 papers →

nitrogen · quality: grain · Allium cepa (onion)Results agree

4 papers: 4 positive, 0 negative or no effect

3 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive
See all 4 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.