Abstract
Nitrogen applied as NH 4 -N or NO 3 -N (75 mg·liter -1 ) affected onion (AIlium cepa L.) plant growth when grown in solution culture. Nitrate alone or in combination with NH 4 -N increased leaf fresh and dry weight, leaf area, root fresh and dry weight, and bulb dry weight when compared to growth with NH 4 -N as the sole N source. Bulb fresh weight was highest with an NH 4 -N: NO 3 -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 NH 4 -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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Claims 9
Claim · model-written summary
Nitrate alone or with NH4-N increased leaf fresh weight, leaf dry weight and leaf area of onion compared with NH4-N as the sole N source.
- Taxon
- Onion
Allium cepat0 - Organ / stage
- leafe1
- Treatment
- Nitrate alone or in combination with NH 4 -Ne1
- Outcome
- leaf fresh and dry weight, leaf areae1
- Direction
- increasede1
- Comparator
- NH 4 -N as the sole N sourcee1
- Setting
- solution culturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen applied as NH 4 -N or NO 3 -N (75 mg·liter -1 ) affected onion (AIlium cepa L.) plant growth when grown in solution culture”
e1“Nitrate alone or in combination with NH 4 -N increased leaf fresh and dry weight, leaf area, root fresh and dry weight, and bulb dry weight when compared to growth with NH 4 -N as the sole N source”
t0“Onion Plant Growth, Bulb Quality, and Water Uptake following Ammonium and Nitrate Nutrition”
Claim · model-written summary
Nitrate alone or with NH4-N increased root fresh and dry weight and bulb dry weight of onion compared with NH4-N as the sole N source.
- Taxon
- OnionAllium cepat0
- Treatment
- Nitrate alone or in combination with NH 4 -Ne1
- Outcome
- root fresh and dry weight, and bulb dry weighte1
- Direction
- increasede1
- Comparator
- NH 4 -N as the sole N sourcee1
- Setting
- solution culturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen applied as NH 4 -N or NO 3 -N (75 mg·liter -1 ) affected onion (AIlium cepa L.) plant growth when grown in solution culture”
e1“Nitrate alone or in combination with NH 4 -N increased leaf fresh and dry weight, leaf area, root fresh and dry weight, and bulb dry weight when compared to growth with NH 4 -N as the sole N source”
t0“Onion Plant Growth, Bulb Quality, and Water Uptake following Ammonium and Nitrate Nutrition”
Claim · model-written summary
Bulb fresh weight of onion was highest with an NH4-N to NO3-N ratio between 1:3 and 3:1.
- Taxon
- OnionAllium cepat0
- Organ / stage
- Bulbe2
- Treatment
- NH 4 -N: NO 3 -N ratio between 1:3 and 3:1e2
- Outcome
- Bulb fresh weighte2
- Direction
- higheste2
- Setting
- solution culturee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen applied as NH 4 -N or NO 3 -N (75 mg·liter -1 ) affected onion (AIlium cepa L.) plant growth when grown in solution culture”
e2“Bulb fresh weight was highest with an NH 4 -N: NO 3 -N ratio between 1:3 and 3:1”
t0“Onion Plant Growth, Bulb Quality, and Water Uptake following Ammonium and Nitrate Nutrition”
Claim · model-written summary
Maximum leaf fresh weight was not necessary for maximum bulb fresh weight of onion under different N-form ratios.
- Taxon
- onionsAllium cepae3
- Treatment
- different N-form ratiose3
- Outcome
- maximum bulb fresh weighte3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Maximum leaf fresh weight was not necessary to produce maximum bulb fresh weight when onions were subjected to different N-form ratios”
Claim · model-written summary
Precocious bulbing of onion occurred when NH4-N was the sole N source.
- Taxon
- OnionAllium cepat0
- Treatment
- NH 4 -N was the sole N sourcee4
- Outcome
- Precocious bulbinge4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Precocious bulbing resulted when NH 4 -N was the sole N source”
t0“Onion Plant Growth, Bulb Quality, and Water Uptake following Ammonium and Nitrate Nutrition”
Claim · model-written summary
High bulbing ratios early in plant development were not correlated with final bulb fresh weight of onion.
- Taxon
- OnionAllium cepat0
- Treatment
- high bulbing ratios early in plant developmente5
- Outcome
- final bulb fresh weighte5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“high bulbing ratios early in plant development were not correlated with final bulb fresh weight”
t0“Onion Plant Growth, Bulb Quality, and Water Uptake following Ammonium and Nitrate Nutrition”
Claim · model-written summary
Nitrogen form influenced water uptake of onion.
- Taxon
- OnionAllium cepat0
- Treatment
- Nitrogen forme6
- Outcome
- water uptakee6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Nitrogen form also influenced water uptake and pungency, as measured by enzymatically developed pyruvate concentration, but did not affect bulb sugar concentration”
t0“Onion Plant Growth, Bulb Quality, and Water Uptake following Ammonium and Nitrate Nutrition”
Claim · model-written summary
Nitrogen form influenced onion pungency, measured as enzymatically developed pyruvate concentration.
- Taxon
- OnionAllium cepat0
- Treatment
- Nitrogen forme6
- Outcome
- pungency, as measured by enzymatically developed pyruvate concentratione6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Nitrogen form also influenced water uptake and pungency, as measured by enzymatically developed pyruvate concentration, but did not affect bulb sugar concentration”
t0“Onion Plant Growth, Bulb Quality, and Water Uptake following Ammonium and Nitrate Nutrition”
Claim · model-written summary
Nitrogen form did not affect onion bulb sugar concentration.
- Taxon
- OnionAllium cepat0
- Treatment
- Nitrogen forme6
- Outcome
- bulb sugar concentratione6
- Direction
- no_changeinferrede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Nitrogen form also influenced water uptake and pungency, as measured by enzymatically developed pyruvate concentration, but did not affect bulb sugar concentration”
t0“Onion Plant Growth, Bulb Quality, and Water Uptake following Ammonium and Nitrate Nutrition”
The same questions in other papers
nitrogen · growth · Allium cepa (onion)Results differ
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- negative
- no effect
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See all 81 papers →nitrogen · quality: sugar starch · Allium cepa (onion)Positive and negative results
2 papers in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
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See all 13 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.