Abstract
Abstract. Raising nitrogen utilization efficiency could not only cut the fertilizer costs, but also reduce the N loss and residual, which benefits a lot to agricultural production and environmental protection. In this experiment, the 15N tracing technique was employed in order to clear the accumulation and whereabouts of fertilizer N in flue-cured tobacco plants, besides, the tobaccos were treated by six different water-nitrogen modes, for the sake of finding out the best design with the highest nitrogen utilization efficiency. The results showed that more N application contributed to more fertilizer N accumulation, also increased the content of total N; Excess irrigation restrained the tobacco plants' absorption of fertilizer N, ultimately leading to the low utilization efficiency of nitrogen fertilizer; After apex pruning, the N offering ability of the soil was much stronger than that of nitrogen fertilizer, and the fertilizer N accounts a relatively small part for the total N in tobacco plants, the highest nitrogen utilization efficiency was 24.16%, recorded in the design of 800mm irrigation amount and 6g/plant pure N application(T2), Meanwhile, the agronomic characters and crop yield was observed, tobaccos in T2 design performed better than the average level of field-cultivated tobaccos, the conclusions could be obtained that T2 design was preferable, which achieved the highest nitrogen utilization efficiency when ensured the normal growth and good harvest of flue-cured tobacco.
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Claims 8
Claim · model-written summary
More N application contributed to more fertilizer N accumulation in flue-cured tobacco.
- Taxon
- Flue-Cured Tobaccot0
- Treatment
- N applicatione0
- Outcome
- fertilizer N accumulatione0
- Direction
- contributed to moree0
Not reportedComparator
Verbatim
t0“Flue-Cured Tobacco”
e0“more N application contributed to more fertilizer N accumulation, also increased the content of total N”
Claim · model-written summary
More N application increased the content of total N in flue-cured tobacco.
Not reportedComparator
Verbatim
t0“Flue-Cured Tobacco”
e0“more N application contributed to more fertilizer N accumulation, also increased the content of total N”
Claim · model-written summary
Excess irrigation restrained absorption of fertilizer N by flue-cured tobacco, leading to low nitrogen fertilizer utilization efficiency.
- Taxon
- Flue-Cured Tobaccot0
- Treatment
- Excess irrigatione1
- Outcome
- absorption of fertilizer Ne1
- Direction
- restrainede1
Not reportedComparator
Verbatim
t0“Flue-Cured Tobacco”
e1“Excess irrigation restrained the tobacco plants' absorption of fertilizer N, ultimately leading to the low utilization efficiency of nitrogen fertilizer”
Claim · model-written summary
After apex pruning, the soil N offering ability was much stronger than that of nitrogen fertilizer.
Verbatim
t0“Flue-Cured Tobacco”
e2“After apex pruning, the N offering ability of the soil was much stronger than that of nitrogen fertilizer”
Claim · model-written summary
Fertilizer N accounts for a relatively small part of total N in tobacco plants.
- Taxon
- tobacco plants
Nicotiana tabacume3 - Outcome
- fertilizer N accounts a relatively small part for the total Ne3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“the fertilizer N accounts a relatively small part for the total N in tobacco plants”
Claim · model-written summary
The 800 mm irrigation and 6 g per plant pure N application design gave the highest nitrogen utilization efficiency, 24.16%.
- Taxon
- Flue-Cured Tobaccot0
- Treatment
- 800mm irrigation amount and 6g/plant pure N applicatione4
- Outcome
- nitrogen utilization efficiencye4
- Direction
- higheste4
- Value
- 24.16%e4
Not reportedComparator
Verbatim
t0“Flue-Cured Tobacco”
e4“the highest nitrogen utilization efficiency was 24.16%, recorded in the design of 800mm irrigation amount and 6g/plant pure N application(T2)”
Claim · model-written summary
T2 design tobacco performed better than the average level of field-cultivated tobacco in agronomic characters and crop yield.
Verbatim
t0“Flue-Cured Tobacco”
e5“Meanwhile, the agronomic characters and crop yield was observed, tobaccos in T2 design performed better than the average level of field-cultivated tobaccos”
Claim · model-written summary
The T2 design is preferable for flue-cured tobacco because it gives the highest nitrogen utilization efficiency while ensuring normal growth and good harvest.
Verbatim
e6“the conclusions could be obtained that T2 design was preferable, which achieved the highest nitrogen utilization efficiency when ensured the normal growth and good harvest of flue-cured tobacco”
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