Abstract
Our previous study showed that both changing N applying method and reducing N application rate to 52.5 kg/ha could meet the growth requirement of tobacco plant for N.A field experiment combining with a microplot in Yunnan province was carried out to further study the effects of N fertilization on the growth and N uptake of flue-cured tobacco.Two N application rates of 120 and 52.5 kg/ha were used.The results showed that tobacco supplied N 120 kg/ha mainly utilized soil N after topping,while soil N became the dominant N source after rosette for plants with N 52.5 kg/ha.Nitrogen application with 52.5 kg/ha could assure the growth of plants from the stage of transplanting to topping;but their dry matter gain and N accumulation decreased slightly comparing with the treatment of N 120 kg/ha due to inadequate N supply after topping.Changing N application rates had no effect on dry matter distribution in tobacco plant.The higher the rate of fertilizer N supplied,the more fertilizer N was found in the plant,and the higher the ratio of fertilizer N to total N in different organs and whole plant was.The highest ratio of the fertilizer N to total N in plant was found in rosette stage,and then it declined slowly.In addition,the ratio of the fertilizer N to total N in upper leaves was smaller than that in lower leaves.And the difference of the ratio of fertilizer N to total N between the upper and lower leaves was smaller,when more N(120 kg/ha) was supplied.
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Claims 11
Claim · model-written summary
At 120 kg/ha nitrogen, tobacco mainly used soil nitrogen after topping.
- Taxon
- tobacco
Nicotiana tabacume0 - Organ / stage
- after toppinge0
- Treatment
- N 120 kg/hae0
- Outcome
- utilized soil Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tobacco supplied N 120 kg/ha mainly utilized soil N after topping”
Claim · model-written summary
At 52.5 kg/ha nitrogen, soil nitrogen became dominant after rosette.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- after rosettee0
- Treatment
- N 52.5 kg/hae0
- Outcome
- soil N became the dominant N sourcee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil N became the dominant N source after rosette for plants with N 52.5 kg/ha”
t0“tobacco”
Claim · model-written summary
The 52.5 kg/ha rate supported growth from transplanting to topping.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- from the stage of transplanting to toppinge0
- Treatment
- Nitrogen application with 52.5 kg/hae0
- Outcome
- growth of plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen application with 52.5 kg/ha could assure the growth of plants from the stage of transplanting to topping”
t0“tobacco”
Claim · model-written summary
Dry matter gain decreased slightly at 52.5 versus 120 kg/ha after topping.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- after toppinge0
- Treatment
- Nitrogen application with 52.5 kg/hae1
- Outcome
- dry matter gaine0
- Direction
- decreased slightlye0
- Comparator
- treatment of N 120 kg/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their dry matter gain and N accumulation decreased slightly comparing with the treatment of N 120 kg/ha due to inadequate N supply after topping”
e1“Nitrogen application with 52.5 kg/ha”
t0“tobacco”
Claim · model-written summary
Nitrogen accumulation decreased slightly at 52.5 versus 120 kg/ha after topping.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- after toppinge0
- Treatment
- Nitrogen application with 52.5 kg/hae1
- Outcome
- N accumulatione0
- Direction
- decreased slightlye0
- Comparator
- treatment of N 120 kg/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their dry matter gain and N accumulation decreased slightly comparing with the treatment of N 120 kg/ha due to inadequate N supply after topping”
e1“Nitrogen application with 52.5 kg/ha”
t0“tobacco”
Claim · model-written summary
Changing nitrogen rates had no effect on tobacco dry matter distribution.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- Changing N application ratese0
- Outcome
- dry matter distributione0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Changing N application rates had no effect on dry matter distribution in tobacco plant”
Claim · model-written summary
Higher fertilizer nitrogen rates increased fertilizer nitrogen found in the plant.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- rate of fertilizer N suppliede0
- Outcome
- fertilizer N was found in the plante0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The higher the rate of fertilizer N supplied,the more fertilizer N was found in the plant”
t0“tobacco”
Claim · model-written summary
Higher fertilizer nitrogen rates increased the fertilizer-to-total nitrogen ratio in organs and whole plants.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- rate of fertilizer N suppliede1
- Outcome
- ratio of fertilizer N to total N in different organs and whole plante0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the higher the ratio of fertilizer N to total N in different organs and whole plant was”
e1“The higher the rate of fertilizer N supplied”
t0“tobacco”
Claim · model-written summary
The fertilizer-to-total nitrogen ratio peaked at rosette stage, then declined.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- rosette stagee0
- Outcome
- ratio of the fertilizer N to total N in plante0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest ratio of the fertilizer N to total N in plant was found in rosette stage,and then it declined slowly”
t0“tobacco”
Claim · model-written summary
The fertilizer-to-total nitrogen ratio was lower in upper than lower leaves.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- ratio of the fertilizer N to total N in upper leavese0
- Direction
- smallere0
- Comparator
- lower leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the ratio of the fertilizer N to total N in upper leaves was smaller than that in lower leaves”
t0“tobacco”
Claim · model-written summary
At 120 kg/ha, the difference in fertilizer-to-total nitrogen ratio between upper and lower leaves was smaller.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- N(120 kg/ha)e0
- Outcome
- difference of the ratio of fertilizer N to total N between the upper and lower leavese0
- Direction
- smallere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the difference of the ratio of fertilizer N to total N between the upper and lower leaves was smaller,when more N(120 kg/ha) was supplied”
t0“tobacco”
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See all 73 papers →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.