Abstract
Onion production and productivity is constrained by biotic and abiotic factors. Soil salinity is one of the factors mentioned by producers in Ethiopia. Hence, the study was conducted to determine the relative tolerance of onion cultivars to salt stress levels under field condition on soil media filled in box at Melkasa Agricultural Research Center. Factorial combined treatments (4×5) were arranged in Randomized Complete Block Design with three replications. Data collected were subjected to analysis of variance using SAS version 9.3. The analysis revealed variation in growth, yield and yield related parameters among cultivars (p≤ 0.05) and salt stress levels (p≤ 0.001). Bombey Red, Nafis and Nasic Red cultivars showed the highest performance in number of leaves per plant, pseudo stem diameter, plant height, leaf length and width, fresh and dry above ground weight. The cultivars also showed the highest bulb length, width, fresh and dry weight. Chlorophyll and stomatal conductance was highly significant for main factors and interactions (p≤ 0.001). Photosystem-II also showed significant difference at 40th and 68th (DAT) days after transplanting among cultivars (p≤ 0.05) and at 40 and 54 DAT stages within salt levels (p≤ 0.001). With 1.2 dSm-1 salt level, the highest growth and yield performances were observed. The highest photosystem-II was recorded for Bombey Red, Nafis and Nasic Red, whereas Adama Red showed the least. Generally, during early growth stages, growth variables were not affected up to 4 dSm-1. Thus, Bombey Red, Nafis, and Nasic Red can be used for salt levels less than 4 dSm-1. Indeed, the experiment should be repeated under controlled environment with multi-cultivars and salt levels not more than 4 dSm-1.
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Claims 13
Claim · model-written summary
Bombey Red, Nafis and Nasic Red had the highest number of leaves per plant, pseudo stem diameter and plant height.
- Taxon
- Onion
Allium cepae0 - Material
- Bombey Red, Nafis and Nasic Rede1
- Outcome
- number of leaves per plant, pseudo stem diameter, plant heighte1
- Direction
- highest performancee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion production and productivity is constrained by biotic and abiotic factors”
e1“Bombey Red, Nafis and Nasic Red cultivars showed the highest performance in number of leaves per plant, pseudo stem diameter, plant height, leaf length and width, fresh and dry above ground weight”
Claim · model-written summary
Bombey Red, Nafis and Nasic Red had the highest leaf length and width.
- Taxon
- OnionAllium cepae0
- Material
- Bombey Red, Nafis and Nasic Rede1
- Outcome
- leaf length and widthe1
- Direction
- highest performancee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion production and productivity is constrained by biotic and abiotic factors”
e1“Bombey Red, Nafis and Nasic Red cultivars showed the highest performance in number of leaves per plant, pseudo stem diameter, plant height, leaf length and width, fresh and dry above ground weight”
Claim · model-written summary
Bombey Red, Nafis and Nasic Red had the highest fresh and dry above-ground weight.
- Taxon
- OnionAllium cepae0
- Material
- Bombey Red, Nafis and Nasic Rede1
- Outcome
- fresh and dry above ground weighte1
- Direction
- highest performancee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion production and productivity is constrained by biotic and abiotic factors”
e1“Bombey Red, Nafis and Nasic Red cultivars showed the highest performance in number of leaves per plant, pseudo stem diameter, plant height, leaf length and width, fresh and dry above ground weight”
Claim · model-written summary
The cultivars had the highest bulb length and width.
- Taxon
- OnionAllium cepae0
- Organ / stage
- bulbe2
- Outcome
- bulb length, widthe2
- Direction
- higheste2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion production and productivity is constrained by biotic and abiotic factors”
e2“The cultivars also showed the highest bulb length, width, fresh and dry weight”
Claim · model-written summary
The cultivars had the highest bulb fresh and dry weight.
- Taxon
- OnionAllium cepae0
- Organ / stage
- bulbe2
- Outcome
- fresh and dry weighte2
- Direction
- higheste2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion production and productivity is constrained by biotic and abiotic factors”
e2“The cultivars also showed the highest bulb length, width, fresh and dry weight”
Claim · model-written summary
Chlorophyll and stomatal conductance differed highly significantly between main factors and their interactions.
- Taxon
- OnionAllium cepae0
- Outcome
- Chlorophyll and stomatal conductancee3
- Value
- p≤ 0.001e3
- Qualifier
- for main factors and interactionse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion production and productivity is constrained by biotic and abiotic factors”
e3“Chlorophyll and stomatal conductance was highly significant for main factors and interactions (p≤ 0.001)”
Claim · model-written summary
Photosystem-II differed among cultivars at 40 and 68 days after transplanting.
- Taxon
- OnionAllium cepae0
- Outcome
- Photosystem-IIe4
- Value
- p≤ 0.05e4
- Qualifier
- 40th and 68th (DAT) days after transplantinge4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion production and productivity is constrained by biotic and abiotic factors”
e4“Photosystem-II also showed significant difference at 40th and 68th (DAT) days after transplanting among cultivars (p≤ 0.05)”
Claim · model-written summary
Photosystem-II differed among salt levels at 40 and 54 days after transplanting.
- Taxon
- OnionAllium cepae0
- Treatment
- salt levelse5
- Outcome
- Photosystem-IIe4
- Value
- p≤ 0.001e5
- Qualifier
- 40 and 54 DAT stagese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion production and productivity is constrained by biotic and abiotic factors”
e4“Photosystem-II also showed significant difference at 40th and 68th (DAT) days after transplanting among cultivars (p≤ 0.05)”
e5“at 40 and 54 DAT stages within salt levels (p≤ 0.001)”
Claim · model-written summary
The 1.2 dS/m salt level gave the highest growth and yield performance.
- Taxon
- OnionAllium cepae0
- Treatment
- 1.2 dSm-1 salt levele6
- Outcome
- growth and yield performancese6
- Direction
- higheste6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion production and productivity is constrained by biotic and abiotic factors”
e6“With 1.2 dSm-1 salt level, the highest growth and yield performances were observed”
Claim · model-written summary
Bombey Red, Nafis and Nasic Red had the highest photosystem-II.
- Taxon
- OnionAllium cepae0
- Material
- Bombey Red, Nafis and Nasic Rede7
- Outcome
- photosystem-IIe7
- Direction
- higheste7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion production and productivity is constrained by biotic and abiotic factors”
e7“The highest photosystem-II was recorded for Bombey Red, Nafis and Nasic Red, whereas Adama Red showed the least”
Claim · model-written summary
Adama Red had the least photosystem-II.
- Taxon
- OnionAllium cepae0
- Material
- Adama Rede7
- Outcome
- photosystem-IIe7
- Direction
- the leaste7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion production and productivity is constrained by biotic and abiotic factors”
e7“The highest photosystem-II was recorded for Bombey Red, Nafis and Nasic Red, whereas Adama Red showed the least”
Claim · model-written summary
Growth variables were not affected by salt levels up to 4 dS/m during early growth stages.
- Taxon
- OnionAllium cepae0
- Treatment
- up to 4 dSm-1e1
- Outcome
- growth variablese1
- Direction
- not affectede1
- Qualifier
- during early growth stagese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion production and productivity is constrained by biotic and abiotic factors”
e1“Generally, during early growth stages, growth variables were not affected up to 4 dSm-1”
Claim · model-written summary
Bombey Red, Nafis and Nasic Red can be used for salt levels less than 4 dS/m.
- Taxon
- OnionAllium cepae0
- Material
- Bombey Red, Nafis, and Nasic Rede1
- Outcome
- can be used for salt levels less than 4 dSm-1e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion production and productivity is constrained by biotic and abiotic factors”
e1“Thus, Bombey Red, Nafis, and Nasic Red can be used for salt levels less than 4 dSm-1”
The same questions in other papers
salinity · yield · Allium cepa (onion)Results differ
1 paper in the same direction as this paper · 18 in the opposite direction
- negative
- negative
- negative
16 papers more in this group
See all 20 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.