Abstract
A field experiment was conducted to investigate the effects of nitrogen rate on nitrogen absorption and utilization of flue-cured tobacco under the dressing ratio of 3∶ 7.The results showed that,the increasing of nitrogen application in the range of 48～168 kg/hm2 was not led to soil nitrogen accumulation evidently after a growing season;By comparison with the treatment without artificial nitrogen fertilization,traditional chemical nitrogen rate(108.00 kg/ hm2),high chemical nitrogen rate(168.00 kg/ hm2) treatments significantly promoted the nitrogen uptake of tobacco,the yield of tobacco with nitrogen application at 108.00 kg/ hm2 and 168.00 kg/ hm2 was increased by 43.14 % and 49.25 %,tobacco output value could be promoted significantly(P0.05),but there was no significant difference in the decreasing of tobacco nitrogen use efficiency and tobacco nitrogen agronomic efficiency from the increased of artificial nitrogen under 70 % of fertilizer applied as top dressing.Tobacco sugar,reducing sugar content showed downtrend along with the increased application of chemical nitrogen and tobacco nicotone was opposite,but not significant,the sensory quality of flue-cured tobacco was not be affected significantly by the enrichment of artificial nitrogen fertilizer in the range of 48～168 kg/ hm2.From this study,it was suggested that 108.00 kg/hm2 chemical nitrogen fertilizer can effectively meet the flue-cured tobacco yield and quality demand under 70% of nitrogen fertilizer applied as top dressing in Nanxiong tobacco area.
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Claims 11
Claim · model-written summary
Increasing nitrogen application from 48 to 168 kg/hm2 did not evidently lead to soil nitrogen accumulation after a growing season.
- Taxon
- flue-cured tobaccoe0
- Treatment
- nitrogen application in the range of 48～168 kg/hm2e1
- Outcome
- soil nitrogen accumulatione1
Not reportedComparatorDirection
Verbatim
e0“investigate the effects of nitrogen rate on nitrogen absorption and utilization of flue-cured tobacco”
e1“the increasing of nitrogen application in the range of 48～168 kg/hm2 was not led to soil nitrogen accumulation evidently after a growing season”
Claim · model-written summary
Traditional chemical nitrogen rate of 108 kg/hm2 significantly promoted tobacco nitrogen uptake compared with no artificial nitrogen.
- Taxon
- tobacco
Nicotiana tabacume2 - Treatment
- traditional chemical nitrogen rate(108.00 kg/ hm2)e2
- Outcome
- nitrogen uptake of tobaccoe2
- Direction
- promotede2
- Comparator
- the treatment without artificial nitrogen fertilizatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“By comparison with the treatment without artificial nitrogen fertilization,traditional chemical nitrogen rate(108.00 kg/ hm2),high chemical nitrogen rate(168.00 kg/ hm2) treatments significantly promoted the nitrogen uptake of tobacco”
Claim · model-written summary
High chemical nitrogen rate of 168 kg/hm2 significantly promoted tobacco nitrogen uptake compared with no artificial nitrogen.
- Taxon
- tobaccoNicotiana tabacume2
- Treatment
- high chemical nitrogen rate(168.00 kg/ hm2)e2
- Outcome
- nitrogen uptake of tobaccoe2
- Direction
- promotede2
- Comparator
- the treatment without artificial nitrogen fertilizatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“By comparison with the treatment without artificial nitrogen fertilization,traditional chemical nitrogen rate(108.00 kg/ hm2),high chemical nitrogen rate(168.00 kg/ hm2) treatments significantly promoted the nitrogen uptake of tobacco”
Claim · model-written summary
Nitrogen application at 108 kg/hm2 increased tobacco yield by 43.14%.
- Taxon
- tobaccoNicotiana tabacume3
- Treatment
- nitrogen application at 108.00 kg/ hm2e3
- Outcome
- the yield of tobaccoe3
- Direction
- increasede3
- Value
- 43.14 %e3
- Comparator
- the treatment without artificial nitrogen fertilizatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“By comparison with the treatment without artificial nitrogen fertilization,traditional chemical nitrogen rate(108.00 kg/ hm2),high chemical nitrogen rate(168.00 kg/ hm2) treatments significantly promoted the nitrogen uptake of tobacco”
e3“the yield of tobacco with nitrogen application at 108.00 kg/ hm2 and 168.00 kg/ hm2 was increased by 43.14 % and 49.25 %”
Claim · model-written summary
Nitrogen application at 168 kg/hm2 increased tobacco yield by 49.25%.
- Taxon
- tobaccoNicotiana tabacume3
- Treatment
- 168.00 kg/ hm2e3
- Outcome
- the yield of tobaccoe3
- Direction
- increasede3
- Value
- 49.25 %e3
- Comparator
- the treatment without artificial nitrogen fertilizatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“By comparison with the treatment without artificial nitrogen fertilization,traditional chemical nitrogen rate(108.00 kg/ hm2),high chemical nitrogen rate(168.00 kg/ hm2) treatments significantly promoted the nitrogen uptake of tobacco”
e3“the yield of tobacco with nitrogen application at 108.00 kg/ hm2 and 168.00 kg/ hm2 was increased by 43.14 % and 49.25 %”
Claim · model-written summary
Tobacco output value could be promoted significantly by the chemical nitrogen rates of 108 and 168 kg/hm2.
- Taxon
- tobaccoNicotiana tabacume4
- Treatment
- traditional chemical nitrogen rate(108.00 kg/ hm2),high chemical nitrogen rate(168.00 kg/ hm2)e2
- Outcome
- tobacco output valuee4
- Direction
- promotede4
- Qualifier
- P0.05e4
- Comparator
- the treatment without artificial nitrogen fertilizatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“By comparison with the treatment without artificial nitrogen fertilization,traditional chemical nitrogen rate(108.00 kg/ hm2),high chemical nitrogen rate(168.00 kg/ hm2) treatments significantly promoted the nitrogen uptake of tobacco”
e4“tobacco output value could be promoted significantly(P0.05)”
Claim · model-written summary
Tobacco sugar and reducing sugar content showed a downtrend as chemical nitrogen application increased.
- Taxon
- TobaccoNicotiana tabacume5
- Treatment
- increased application of chemical nitrogene5
- Outcome
- sugar,reducing sugar contente5
- Direction
- downtrende5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Tobacco sugar,reducing sugar content showed downtrend along with the increased application of chemical nitrogen”
Claim · model-written summary
Tobacco nicotine tended to increase with chemical nitrogen application, but not significantly.
- Taxon
- tobaccoNicotiana tabacume6
- Treatment
- increased application of chemical nitrogene5
- Outcome
- tobacco nicotonee6
- Direction
- increaseinferrede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Tobacco sugar,reducing sugar content showed downtrend along with the increased application of chemical nitrogen”
e6“tobacco nicotone was opposite,but not significant”
Claim · model-written summary
Sensory quality of flue-cured tobacco was not significantly affected by artificial nitrogen in the range of 48 to 168 kg/hm2.
- Taxon
- flue-cured tobaccoe7
- Treatment
- enrichment of artificial nitrogen fertilizer in the range of 48～168 kg/ hm2e7
- Outcome
- sensory qualitye7
- Direction
- no_changeinferrede7
Not reportedComparator
Verbatim
e7“the sensory quality of flue-cured tobacco was not be affected significantly by the enrichment of artificial nitrogen fertilizer in the range of 48～168 kg/ hm2”
Claim · model-written summary
Nitrogen use efficiency and nitrogen agronomic efficiency did not differ significantly as artificial nitrogen increased under 70% top dressing.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- artificial nitrogen under 70 % of fertilizer applied as top dressinge1
- Outcome
- tobacco nitrogen use efficiency and tobacco nitrogen agronomic efficiencye1
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“there was no significant difference in the decreasing of tobacco nitrogen use efficiency and tobacco nitrogen agronomic efficiency from the increased of artificial nitrogen under 70 % of fertilizer applied as top dressing”
Claim · model-written summary
The authors suggest that 108 kg/hm2 chemical nitrogen fertilizer meets flue-cured tobacco yield and quality demand under 70% top dressing in Nanxiong.
Verbatim
e0“108.00 kg/hm2 chemical nitrogen fertilizer can effectively meet the flue-cured tobacco yield and quality demand under 70% of nitrogen fertilizer applied as top dressing in Nanxiong tobacco area”
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