Abstract
In order to investigate the effects of transplanting date(5th May,15th May,25th May) of flue-cured tobacco(FCT) seedlings and nitrogen fertilization on nicotine synthesis and sources of nicotine N of FCT,a field experiment with 15N isotope tracing micro-plots was carried out in Laowan(N 31°27′,E 111°14′,1130 m above sea level),a main tobacco production area of Xiangfan city,Hubei province.The results showed that,compared with the transplanting date of 5th May,postponing the transplanting date to 15th25th May increased the nicotine concentrations,the proportion of nicotine N to total N,and the proportion of nicotine fertilizer N in organs of FCT plants by 10%-85%,5%-110%,and 21%-56%,respectively.Applying N fertilizer significantly increased the nicotine concentration and the proportion of nicotine N to total N by 12%-59% and 5%-127%,respectively.The proportion of nicotine N to total N in different parts of FCT plants increased with growing of the plants,and the proportion of nicotine fertilizer N decreased with the growing of FCT plants and the rising of leaf position.Soil N was the main source of nicotine N.These results suggested that decreasing of N supplication and early transplanting make for reducing of nicotine concentrations in FCT leaves,especially in the middle and upper leaves.
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Claims 10
Claim · model-written summary
Later transplanting increased nicotine concentrations in flue-cured tobacco organs by 10%-85% relative to 5th May.
Verbatim
e0“compared with the transplanting date of 5th May,postponing the transplanting date to 15th25th May increased the nicotine concentrations,the proportion of nicotine N to total N,and the proportion of nicotine fertilizer N in organs of FCT plants by 10%-85%,5%-110%,and 21%-56%,respectively”
t0“flue-cured tobacco”
Claim · model-written summary
Later transplanting increased the proportion of nicotine N to total N by 5%-110%.
Verbatim
e0“compared with the transplanting date of 5th May,postponing the transplanting date to 15th25th May increased the nicotine concentrations,the proportion of nicotine N to total N,and the proportion of nicotine fertilizer N in organs of FCT plants by 10%-85%,5%-110%,and 21%-56%,respectively”
t0“flue-cured tobacco”
Claim · model-written summary
Later transplanting increased the proportion of nicotine fertilizer N by 21%-56%.
Verbatim
e0“compared with the transplanting date of 5th May,postponing the transplanting date to 15th25th May increased the nicotine concentrations,the proportion of nicotine N to total N,and the proportion of nicotine fertilizer N in organs of FCT plants by 10%-85%,5%-110%,and 21%-56%,respectively”
t0“flue-cured tobacco”
Claim · model-written summary
N fertilizer increased nicotine concentration by 12%-59%.
- Taxon
- flue-cured tobaccot0
- Treatment
- N fertilizere0
- Outcome
- nicotine concentratione0
- Direction
- increasede0
- Value
- 12%-59%e0
Not reportedComparator
Verbatim
e0“Applying N fertilizer significantly increased the nicotine concentration and the proportion of nicotine N to total N by 12%-59% and 5%-127%,respectively”
t0“flue-cured tobacco”
Claim · model-written summary
N fertilizer increased the proportion of nicotine N to total N by 5%-127%.
- Taxon
- flue-cured tobaccot0
- Treatment
- N fertilizere0
- Outcome
- proportion of nicotine N to total Ne0
- Direction
- increasede0
- Value
- 5%-127%e0
Not reportedComparator
Verbatim
e0“Applying N fertilizer significantly increased the nicotine concentration and the proportion of nicotine N to total N by 12%-59% and 5%-127%,respectively”
t0“flue-cured tobacco”
Claim · model-written summary
The proportion of nicotine N to total N rose as tobacco plants grew.
Verbatim
e0“The proportion of nicotine N to total N in different parts of FCT plants increased with growing of the plants”
t0“flue-cured tobacco”
Claim · model-written summary
The proportion of nicotine fertilizer N fell as tobacco plants grew.
Verbatim
e0“the proportion of nicotine fertilizer N decreased with the growing of FCT plants and the rising of leaf position”
t0“flue-cured tobacco”
Claim · model-written summary
The proportion of nicotine fertilizer N fell with higher leaf position.
Verbatim
e0“the proportion of nicotine fertilizer N decreased with the growing of FCT plants and the rising of leaf position”
t0“flue-cured tobacco”
Claim · model-written summary
Soil N was the main source of nicotine N in tobacco.
Not reportedDirection
Verbatim
e0“Soil N was the main source of nicotine N”
t0“flue-cured tobacco”
Claim · model-written summary
The authors suggest decreasing N supply and early transplanting to reduce nicotine in tobacco leaves, especially middle and upper leaves.
Verbatim
e0“decreasing of N supplication and early transplanting make for reducing of nicotine concentrations in FCT leaves,especially in the middle and upper leaves”
t0“flue-cured tobacco”
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fertilization · molecular: metabolites · Nicotiana tabacum (tobacco)Results differ
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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.