Abstract
An experiment was conducted to study the effect of different levels of nitrogen (N) and phosphorus (P) fertilizers on bulb quality and storability of onion (Allium cepa L.) grown on vertisol of Shewa Robit, North-East Ethiopia. Five rates of N (0, 69, 92, 115, 138 kg ha-1) and five rates of P (0, 10, 20, 30, 40 kg ha-1) were arranged in a randomized complete block design, replicated three times. Regardless of the rate, N fertilization decreased bulb dry matter content by about 4% over the control. Pungency measured as pyruvate concentration improved with increase in the rate of N application and reached the highest value of 2.72 µmol ml-1 at a rate of 138 kg N ha-1. Bulb storability study for eight weeks at ambient condition indicated that the highest level of N or P fertilizer caused the highest cumulative weight loss. It was also observed that bulb sprouting percentage of 63 and 53% were recorded from treatments that received 69 and 40 kg P ha-1,respectively. Nitrogen at the rate of 115 or 138 kg ha-1 resulted in about 2.9% rotting of the bulbs. N fertilization improved pungency, reduced bulb dry matter content and storability by enhancing sprouting and rotting percentage. Bulb dry matter content, pungency and rotting percentage were not significantly affected by P fertilization and the lack of response may be due to the availability of adequate amount of P (16.02 ppm) in the soil. Key words: Bulb rotting, dry matter, pungency, sprouting, weight loss.
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Claims 11
Claim · model-written summary
Nitrogen fertilization decreased bulb dry matter content by about 4% versus the control.
- Taxon
- onion (Allium cepa L.)
Allium cepat0 - Treatment
- N fertilizatione0
- Outcome
- bulb dry matter contente0
- Direction
- decreasede0
- Value
- about 4%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Regardless of the rate, N fertilization decreased bulb dry matter content by about 4% over the control.”
t0“onion (Allium cepa L.)”
Claim · model-written summary
Increasing nitrogen improved onion pungency, reaching 2.72 µmol ml-1 at 138 kg N ha-1.
- Taxon
- onion (Allium cepa L.)Allium cepat0
- Treatment
- 138 kg N ha-1e0
- Outcome
- Pungency measured as pyruvate concentratione0
- Direction
- improvede0
- Value
- 2.72 µmol ml-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pungency measured as pyruvate concentration improved with increase in the rate of N application and reached the highest value of 2.72 µmol ml-1 at a rate of 138 kg N ha-1.”
t0“onion (Allium cepa L.)”
Claim · model-written summary
The highest nitrogen level caused the greatest cumulative bulb weight loss over eight weeks.
- Taxon
- onion (Allium cepa L.)Allium cepat0
- Treatment
- highest level of Ne0
- Outcome
- cumulative weight losse0
- Direction
- higheste0
- Qualifier
- eight weeks at ambient conditione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bulb storability study for eight weeks at ambient condition indicated that the highest level of N or P fertilizer caused the highest cumulative weight loss.”
t0“onion (Allium cepa L.)”
Claim · model-written summary
The highest phosphorus level caused the greatest cumulative bulb weight loss over eight weeks.
- Taxon
- onion (Allium cepa L.)Allium cepat0
- Treatment
- P fertilizere0
- Outcome
- cumulative weight losse0
- Direction
- higheste0
- Qualifier
- eight weeks at ambient conditione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bulb storability study for eight weeks at ambient condition indicated that the highest level of N or P fertilizer caused the highest cumulative weight loss.”
t0“onion (Allium cepa L.)”
Claim · model-written summary
The reported bulb sprouting percentage was 63% for a treatment described as receiving 69 kg P ha-1.
- Taxon
- onion (Allium cepa L.)Allium cepat0
- Treatment
- 69e0
- Outcome
- bulb sprouting percentagee0
- Value
- 63e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It was also observed that bulb sprouting percentage of 63 and 53% were recorded from treatments that received 69 and 40 kg P ha-1,respectively.”
t0“onion (Allium cepa L.)”
Claim · model-written summary
The reported bulb sprouting percentage was 53% with 40 kg P ha-1.
- Taxon
- onion (Allium cepa L.)Allium cepat0
- Treatment
- 40 kg P ha-1e0
- Outcome
- bulb sprouting percentagee0
- Value
- 53%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It was also observed that bulb sprouting percentage of 63 and 53% were recorded from treatments that received 69 and 40 kg P ha-1,respectively.”
t0“onion (Allium cepa L.)”
Claim · model-written summary
Nitrogen at 115 was associated with about 2.9% bulb rotting.
- Taxon
- onion (Allium cepa L.)Allium cepat0
- Treatment
- 115e0
- Outcome
- rotting of the bulbse0
- Value
- about 2.9%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen at the rate of 115 or 138 kg ha-1 resulted in about 2.9% rotting of the bulbs.”
t0“onion (Allium cepa L.)”
Claim · model-written summary
Nitrogen at 138 kg ha-1 was associated with about 2.9% bulb rotting.
- Taxon
- onion (Allium cepa L.)Allium cepat0
- Treatment
- 138 kg ha-1e0
- Outcome
- rotting of the bulbse0
- Value
- about 2.9%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen at the rate of 115 or 138 kg ha-1 resulted in about 2.9% rotting of the bulbs.”
t0“onion (Allium cepa L.)”
Claim · model-written summary
Phosphorus fertilization did not significantly affect bulb dry matter content.
- Taxon
- onion (Allium cepa L.)Allium cepat0
- Treatment
- P fertilizatione0
- Outcome
- Bulb dry matter contente0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bulb dry matter content, pungency and rotting percentage were not significantly affected by P fertilization and the lack of response may be due to the availability of adequate amount of P (16.02 ppm) in the soil.”
t0“onion (Allium cepa L.)”
Claim · model-written summary
Phosphorus fertilization did not significantly affect pungency.
- Taxon
- onion (Allium cepa L.)Allium cepat0
- Treatment
- P fertilizatione0
- Outcome
- pungencye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bulb dry matter content, pungency and rotting percentage were not significantly affected by P fertilization and the lack of response may be due to the availability of adequate amount of P (16.02 ppm) in the soil.”
t0“onion (Allium cepa L.)”
Claim · model-written summary
Phosphorus fertilization did not significantly affect rotting percentage.
- Taxon
- onion (Allium cepa L.)Allium cepat0
- Treatment
- P fertilizatione0
- Outcome
- rotting percentagee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bulb dry matter content, pungency and rotting percentage were not significantly affected by P fertilization and the lack of response may be due to the availability of adequate amount of P (16.02 ppm) in the soil.”
t0“onion (Allium cepa L.)”
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