Abstract
【Objective】Salinity is one of the major abiotic stresses affecting plant productivity.【Method】The enflunce of different ratio of ammomium and nitrate on cotton seedling growth and development as well as seedlings N nutrition character were investigated under three leveles of NaCl stress,namely 0,100,200 mM.Experiment was carried out in hydroponic culture condition in greenhouse.【Result】The results show that dry weight of cotton seedling,leaf,stem and root as well significantly increased under ammomium/nitrate ratio of NH4+/NO3-y=50/50 and 75/25(P0.05).Compared with the N application ratio of NH4+/NO3-=0/100 treatment,cotton seedling totoal biomass dry weight enhanced by 47.4% and 44.0% at the N ratio of NH4+/NO3=75/25 under 0mM and 100mM NaCl levels respectively.The amount of N uptake by cotton seedling is greatly higher in the treatment of ammomium and nitrate supply ratio of 50/50 and 75/25 than ammonium or nitrate supply sololy.Leaf expand rate and stem extend rate of cotton were significantly increased in ammomium and nitrate supply ratio of 50/50 and 75/25.NaCl stress has obvious inhibition effect on cotton seedling growth and sharply decrease cotton dry weight and the amount of N accumulation and leaf chlorophyl content as well,【Conclusion】while the inhibitation effece caused by salt stress could be obviously alleviated under ammomium/nitrate supply ratio of 50/50 and 75/25.
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Claims 8
Claim · model-written summary
Cotton seedling, leaf, stem and root dry weight increased at nitrogen ratios 50/50 and 75/25.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- NH4+/NO3-y=50/50 and 75/25e0
- Outcome
- dry weight of cotton seedling,leaf,stem and roote0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dry weight of cotton seedling,leaf,stem and root as well significantly increased under ammomium/nitrate ratio of NH4+/NO3-y=50/50 and 75/25(P0.05)”
Claim · model-written summary
At 0mM NaCl, the 75/25 nitrogen ratio raised cotton seedling biomass dry weight by 47.4% relative to 0/100.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- NH4+/NO3=75/25e0
- Outcome
- seedling totoal biomass dry weighte0
- Direction
- enhancede0
- Value
- 47.4%e0
- Qualifier
- 0mMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton seedling totoal biomass dry weight enhanced by 47.4% and 44.0% at the N ratio of NH4+/NO3=75/25 under 0mM and 100mM NaCl levels respectively”
Claim · model-written summary
At 100mM NaCl, the 75/25 nitrogen ratio raised cotton seedling biomass dry weight by 44.0% relative to 0/100.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- NH4+/NO3=75/25e0
- Outcome
- seedling totoal biomass dry weighte0
- Direction
- enhancede0
- Value
- 44.0%e0
- Qualifier
- 100mMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton seedling totoal biomass dry weight enhanced by 47.4% and 44.0% at the N ratio of NH4+/NO3=75/25 under 0mM and 100mM NaCl levels respectively”
Claim · model-written summary
Nitrogen uptake was higher at 50/50 and 75/25 than with ammonium or nitrate alone.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- ammomium and nitrate supply ratio of 50/50 and 75/25e0
- Outcome
- amount of N uptakee0
- Direction
- highere0
- Comparator
- ammonium or nitrate supply sololye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amount of N uptake by cotton seedling is greatly higher in the treatment of ammomium and nitrate supply ratio of 50/50 and 75/25 than ammonium or nitrate supply sololy”
Claim · model-written summary
Leaf expansion and stem extension rates increased under 50/50 and 75/25 ratios.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- ammomium and nitrate supply ratio of 50/50 and 75/25e0
- Outcome
- Leaf expand rate and stem extend ratee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf expand rate and stem extend rate of cotton were significantly increased in ammomium and nitrate supply ratio of 50/50 and 75/25”
Claim · model-written summary
NaCl stress inhibited cotton seedling growth.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- NaCl stresse0
- Outcome
- cotton seedling growthe0
- Direction
- inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NaCl stress has obvious inhibition effect on cotton seedling growth”
Claim · model-written summary
NaCl stress sharply decreased cotton dry weight, nitrogen accumulation and leaf chlorophyll content.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- cotton dry weight and the amount of N accumulation and leaf chlorophyl contente0
- Direction
- decreasee0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sharply decrease cotton dry weight and the amount of N accumulation and leaf chlorophyl content as well”
Claim · model-written summary
Mixed ammonium/nitrate ratios alleviated salt stress inhibition.
- Treatment
- ammomium/nitrate supply ratio of 50/50 and 75/25e0
- Outcome
- inhibitation effece caused by salt stresse0
- Direction
- alleviatede0
Not reportedTaxonComparator
Verbatim
e0“the inhibitation effece caused by salt stress could be obviously alleviated under ammomium/nitrate supply ratio of 50/50 and 75/25”
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