Abstract
In order to optimize the floating system nutrient solution for growing areas of burnt- sweetness type tobacco in Hunan province under low temperature and little sunshine,effects of different nitrogen forms,concentrations and proportions of different types of ammonium salts to nitric nitrogen on growth and physiological characteristics of tobacco seedlings were studied with Yunyan 87 as material. The results indicated that treatment of nutrient solution with 100% NO-3- N was advantageous to roots elongation and chlorophyll synthesis,while its blade,stem girth,root activity and nitrate reductase activity of tobacco seedlings were worse than those of treatment of nutrient solution with 50% NO-3- N + 50% NH-4- N. The agronomic traits and physiological index of tobacco seedlings in treatment of N concentration of 500 mg / L or 700 mg / L were better than those in others treatment. The agronomic traits,chlorophyll content,roots activity and NAR activity in treatment of mixed ligand nutrient solution with ammonium hydrogenphosphate and NO-3- N were better than those of nutrient solution with ammonium nitrate,and the optimal ratio of NO-3- N and NH-4- N was 1∶ 1.
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Claims 7
Claim · model-written summary
Nutrient solution with 100% NO-3-N was advantageous for root elongation and chlorophyll synthesis.
- Taxon
- Tobacco
Nicotiana tabacumt0 - Treatment
- 100% NO-3- Ne1
- Outcome
- roots elongation and chlorophyll synthesise1
- Direction
- advantageouse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Seedlings”
e1“treatment of nutrient solution with 100% NO-3- N was advantageous to roots elongation and chlorophyll synthesis”
Claim · model-written summary
Nutrient solution with 100% NO-3-N gave worse blade and stem girth than 50% NO-3-N plus 50% NH-4-N.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- 100% NO-3- Ne1
- Outcome
- blade,stem girthe2
- Direction
- worsee2
- Comparator
- 50% NO-3- N + 50% NH-4- Ne2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Seedlings”
e1“treatment of nutrient solution with 100% NO-3- N was advantageous to roots elongation and chlorophyll synthesis”
e2“its blade,stem girth,root activity and nitrate reductase activity of tobacco seedlings were worse than those of treatment of nutrient solution with 50% NO-3- N + 50% NH-4- N”
Claim · model-written summary
Nutrient solution with 100% NO-3-N gave worse root activity and nitrate reductase activity than 50% NO-3-N plus 50% NH-4-N.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- 100% NO-3- Ne1
- Outcome
- root activity and nitrate reductase activitye2
- Direction
- worsee2
- Comparator
- 50% NO-3- N + 50% NH-4- Ne2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Seedlings”
e1“treatment of nutrient solution with 100% NO-3- N was advantageous to roots elongation and chlorophyll synthesis”
e2“its blade,stem girth,root activity and nitrate reductase activity of tobacco seedlings were worse than those of treatment of nutrient solution with 50% NO-3- N + 50% NH-4- N”
Claim · model-written summary
N concentration of 500 or 700 mg/L gave better agronomic traits and physiological indices than other treatments.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- N concentration of 500 mg / L or 700 mg / Le3
- Outcome
- agronomic traits and physiological indexe3
- Direction
- bettere3
- Comparator
- others treatmente3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Seedlings”
e3“The agronomic traits and physiological index of tobacco seedlings in treatment of N concentration of 500 mg / L or 700 mg / L were better than those in others treatment”
Claim · model-written summary
Mixed ligand nutrient solution gave better agronomic traits, chlorophyll content and root activity than ammonium nitrate solution.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- mixed ligand nutrient solution with ammonium hydrogenphosphate and NO-3- Ne4
- Outcome
- agronomic traits,chlorophyll content,roots activitye4
- Direction
- bettere4
- Comparator
- nutrient solution with ammonium nitratee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Seedlings”
e4“The agronomic traits,chlorophyll content,roots activity and NAR activity in treatment of mixed ligand nutrient solution with ammonium hydrogenphosphate and NO-3- N were better than those of nutrient solution with ammonium nitrate”
Claim · model-written summary
Mixed ligand nutrient solution gave better nitrate reductase (NAR) activity than ammonium nitrate solution.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- mixed ligand nutrient solution with ammonium hydrogenphosphate and NO-3- Ne4
- Outcome
- NAR activitye4
- Direction
- bettere4
- Comparator
- nutrient solution with ammonium nitratee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Seedlings”
e4“The agronomic traits,chlorophyll content,roots activity and NAR activity in treatment of mixed ligand nutrient solution with ammonium hydrogenphosphate and NO-3- N were better than those of nutrient solution with ammonium nitrate”
Claim · model-written summary
The optimal NO-3-N to NH-4-N ratio for tobacco seedlings in nutrient solution was 1:1.
- Taxon
- TobaccoNicotiana tabacumt0
- Outcome
- optimal ratio of NO-3- N and NH-4- Ne5
- Value
- 1∶ 1e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tobacco Seedlings”
e5“the optimal ratio of NO-3- N and NH-4- N was 1∶ 1”
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