Abstract
Effects of nitrogen and phosphorus interaction on enzyme activity in carbon and nitrogen metabolism and the content of chlorophyll were studied by filed experiment.Results showed that with equal K fertilizer rate,the tendency of nitrate reductase(NR) activity declined at early and middle stage;the decline of invertase(INV) activity shifted to an earlier date;amylase activity increased at later stage and the chlorophyll content of tobacco leaves increased faster at earlier stage.The nitrate reductase(NR) activity increased at earlier stage under phosphorus application of 45-105 kg/hm2;the application of phosphorus at 105 kg/hm2 and 135 kg/hm2 had no effect on the invertase(INV) activity.Applying more phosphorus can greatly increase amylase activity at later stage.With nitrogen level of 60 kg/hm2,chlorophyll content increased at the application of phosphorus of 45-105 kg/hm2.In conclusion,mid level of nitrogen is inductive to carbon and nitrogen metabolism which can lead to high quality tobacco growth.With nitrogen level of 60 kg/hm2,tobacco grows better at N and P20 and K2O rate of 1∶1.75∶3.375.
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Claims 9
Claim · model-written summary
Nitrate reductase activity increased at the earlier stage under phosphorus application of 45-105 kg/hm2.
- Taxon
- tobacco
Nicotiana tabacume0 - Organ / stage
- earlier stagee1
- Treatment
- phosphorus application of 45-105 kg/hm2e1
- Outcome
- nitrate reductase(NR) activitye1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The nitrate reductase(NR) activity increased at earlier stage under phosphorus application of 45-105 kg/hm2”
e0“tobacco leaves”
Claim · model-written summary
Phosphorus at 105 and 135 kg/hm2 had no effect on invertase activity.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- application of phosphorus at 105 kg/hm2 and 135 kg/hm2e1
- Outcome
- invertase(INV) activitye1
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the application of phosphorus at 105 kg/hm2 and 135 kg/hm2 had no effect on the invertase(INV) activity”
e0“tobacco leaves”
Claim · model-written summary
Applying more phosphorus greatly increased amylase activity at the later stage.
- Taxon
- tobaccoNicotiana tabacume0
- Organ / stage
- later stagee1
- Treatment
- Applying more phosphoruse1
- Outcome
- amylase activitye1
- Direction
- increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Applying more phosphorus can greatly increase amylase activity at later stage”
e0“tobacco leaves”
Claim · model-written summary
At a nitrogen level of 60 kg/hm2, chlorophyll content increased with phosphorus application of 45-105 kg/hm2.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- application of phosphorus of 45-105 kg/hm2e1
- Outcome
- chlorophyll contente1
- Direction
- increasede1
- Qualifier
- nitrogen level of 60 kg/hm2e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“With nitrogen level of 60 kg/hm2,chlorophyll content increased at the application of phosphorus of 45-105 kg/hm2”
e0“tobacco leaves”
Claim · model-written summary
With equal K fertilizer rate, nitrate reductase activity declined at the early and middle stages.
- Taxon
- tobaccoNicotiana tabacume0
- Outcome
- nitrate reductase(NR) activitye1
- Direction
- declinede1
- Qualifier
- equal K fertilizer ratee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“with equal K fertilizer rate,the tendency of nitrate reductase(NR) activity declined at early and middle stage”
e0“tobacco leaves”
Claim · model-written summary
The decline of invertase activity shifted to an earlier date.
- Taxon
- tobaccoNicotiana tabacume0
- Outcome
- invertase(INV) activitye1
- Direction
- declinee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the decline of invertase(INV) activity shifted to an earlier date”
e0“tobacco leaves”
Claim · model-written summary
Chlorophyll content of tobacco leaves increased faster at the earlier stage.
- Taxon
- tobaccoNicotiana tabacume1
- Organ / stage
- leavese1
- Outcome
- chlorophyll contente1
- Direction
- increased fastere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the chlorophyll content of tobacco leaves increased faster at earlier stage”
Claim · model-written summary
The authors conclude that a mid level of nitrogen is inductive to carbon and nitrogen metabolism, which can lead to high quality tobacco growth.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- mid level of nitrogene1
- Outcome
- carbon and nitrogen metabolisme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“mid level of nitrogen is inductive to carbon and nitrogen metabolism which can lead to high quality tobacco growth”
Claim · model-written summary
At a nitrogen level of 60 kg/hm2, tobacco grows better at an N:P2O5:K2O rate of 1:1.75:3.375.
- Taxon
- tobaccoNicotiana tabacume1
- Outcome
- grows bettere1
- Qualifier
- N and P20 and K2O rate of 1∶1.75∶3.375e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“With nitrogen level of 60 kg/hm2,tobacco grows better at N and P20 and K2O rate of 1∶1.75∶3.375”
The same questions in other papers
phosphorus · physiology: enzyme activity · Nicotiana tabacum (tobacco)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
phosphorus · physiology: pigments · Nicotiana tabacum (tobacco)Results agree
3 papers in the same direction as this paper
- positive
- positive
- 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.