Abstract
Increasing salinity in agricultural lands has led to the limitation of crop cultivation and reduction of crop yields. Therefore, many researchers in the world focus on finding alternative crops. Halophytes, because of some mechanisms such as antioxidant systems are resistant to salt stress. In order to study the effects of NaCl salinity and nitrogen levels on growth, ascorbic acid and nitrate contents in the edible halophyte S. aegyptiaca, a factorial experiment with 5 levels of NaCl including 10, 20, 40, 60 and 80 dS m -1 as the first factor and three levels of nitrogen including 25, 50 and 75 mg kg -1 in urea form as the second factor in completely randomized design with three replications was conducted under the greenhouse conditions. NaCl treatments were applied after the plants had reached a stand. Nitrogen was also added at two stages within 10 days. The results showed that the highest fresh and dry weights of plants were obtained at 20 dS m -1 salinity level. The fresh and dry weights decreased more by increasing salinity. At salinity levels of 10 and 20 dS m -1 , the fresh and dry weights increased with increasing nitrogen levels, but at higher salinity levels, the moderate levels of nitrogen produced the highest fresh and dry weights. With increasing salinity up to 40 dS m -1 the vitamin C content firstly increased and then decreased with further increase in salinity. The vitamin C levels also decreased with increasing nitrogen levels. Furthermore, the nitrate concentration increased with increasing nitrogen levels. At salinity levels of 10, 20 and 40 dS m -1 concentration of nitrate at different levels of nitrogen was constant but decreased at 60 and 80 dS m -1 salinity levels with decreasing nitrogen levels.
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Claims 10
Claim · model-written summary
Fresh and dry plant weights were highest at 20 dS m -1 salinity.
- Taxon
- S. aegyptiaca
Suaeda aegyptiacae1 - Treatment
- 20 dS m -1 salinity levele0
- Outcome
- fresh and dry weightse0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest fresh and dry weights of plants were obtained at 20 dS m -1 salinity level”
e1“edible halophyte S. aegyptiaca”
Claim · model-written summary
Fresh and dry weights fell as salinity increased further.
- Taxon
- S. aegyptiacaSuaeda aegyptiacae1
- Treatment
- increasing salinitye0
- Outcome
- fresh and dry weightse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fresh and dry weights decreased more by increasing salinity”
e1“edible halophyte S. aegyptiaca”
Claim · model-written summary
At 10 and 20 dS m -1 salinity, fresh and dry weights increased with nitrogen.
- Taxon
- S. aegyptiacaSuaeda aegyptiacae1
- Treatment
- increasing nitrogen levelse0
- Outcome
- fresh and dry weightse0
- Direction
- increasede0
- Qualifier
- At salinity levels of 10 and 20 dS m -1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At salinity levels of 10 and 20 dS m -1 , the fresh and dry weights increased with increasing nitrogen levels”
e1“edible halophyte S. aegyptiaca”
Claim · model-written summary
At higher salinity, moderate nitrogen gave the highest fresh and dry weights.
- Taxon
- S. aegyptiacaSuaeda aegyptiacae1
- Treatment
- moderate levels of nitrogene0
- Outcome
- fresh and dry weightse0
- Direction
- higheste0
- Qualifier
- at higher salinity levelse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at higher salinity levels, the moderate levels of nitrogen produced the highest fresh and dry weights”
e1“edible halophyte S. aegyptiaca”
Claim · model-written summary
Vitamin C rose with salinity up to 40 dS m -1.
- Taxon
- S. aegyptiacaSuaeda aegyptiacae1
- Treatment
- increasing salinity up to 40 dS m -1e0
- Outcome
- vitamin C contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing salinity up to 40 dS m -1 the vitamin C content firstly increased”
e1“edible halophyte S. aegyptiaca”
Claim · model-written summary
Vitamin C fell as salinity increased beyond 40 dS m -1.
- Taxon
- S. aegyptiacaSuaeda aegyptiacae1
- Treatment
- further increase in salinitye0
- Outcome
- vitamin C contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the vitamin C content firstly increased and then decreased with further increase in salinity”
e1“edible halophyte S. aegyptiaca”
Claim · model-written summary
Vitamin C decreased with increasing nitrogen.
- Taxon
- S. aegyptiacaSuaeda aegyptiacae1
- Treatment
- increasing nitrogen levelse0
- Outcome
- vitamin C levelse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The vitamin C levels also decreased with increasing nitrogen levels”
e1“edible halophyte S. aegyptiaca”
Claim · model-written summary
Nitrate concentration increased with nitrogen levels.
- Taxon
- S. aegyptiacaSuaeda aegyptiacae1
- Treatment
- increasing nitrogen levelse0
- Outcome
- nitrate concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the nitrate concentration increased with increasing nitrogen levels”
e1“edible halophyte S. aegyptiaca”
Claim · model-written summary
At 10, 20 and 40 dS m -1 salinity, nitrate concentration was constant across nitrogen levels.
- Taxon
- S. aegyptiacaSuaeda aegyptiacae1
- Treatment
- different levels of nitrogene0
- Outcome
- concentration of nitratee0
- Direction
- constante0
- Qualifier
- At salinity levels of 10, 20 and 40 dS m -1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At salinity levels of 10, 20 and 40 dS m -1 concentration of nitrate at different levels of nitrogen was constant”
e1“edible halophyte S. aegyptiaca”
Claim · model-written summary
At 60 and 80 dS m -1 salinity, nitrate fell with decreasing nitrogen.
- Taxon
- S. aegyptiacaSuaeda aegyptiacae2
- Treatment
- decreasing nitrogen levelse0
- Outcome
- concentration of nitratee1
- Direction
- decreasede0
- Qualifier
- 60 and 80 dS m -1 salinity levelse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased at 60 and 80 dS m -1 salinity levels with decreasing nitrogen levels”
e1“concentration of nitrate at different levels of nitrogen was constant but decreased”
e2“edible halophyte S. aegyptiaca”
The same questions in other papers
salinity · growth · Suaeda aegyptiacaPositive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
See all 5 papers →nitrogen · growth · Suaeda aegyptiacaResults agree
1 paper in the same direction as this paper
- positive
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.