Abstract
Field experiments in southeast Tibet were conducted to study the effect of nitrogenous fertilizer supply and its forms on tobacco. The result indicated that the yield, production value, and the contents of nicotine, potassium oxide and total nitrogen of the cured leaves were positively correlated to the amount of N application, and significantly and negatively correlated to the percentage of superior-medium class leaves of tobacco and contents of deoxidize sugar. The highest yield and best quality of tobacco were obtained by applying 75 kg N per hectare. Inorganic nitrogenous fertilizer could significantly improve the yield and quality of tobacco, compared with organic nitrogenous fertilizer. Although there was no significant difference among ammonium N, nitrate N and nitrate-ammonium N application, the effects of ammonium N, nitrate N, and nitrate-ammoniun N application were significantly higher than that of urea application. The effect of ammoniun N application on tobacco yield and quality was better than that of nitrate N application, and the important reason was the great difference in the process of absorption and assimilation of ammoniun N and nitrate N.
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Claims 9
Claim · model-written summary
Yield and production value rose with nitrogen application amount.
- Taxon
- tobacco
Nicotiana tabacume1 - Treatment
- amount of N applicatione0
- Outcome
- yield, production valuee0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield, production value, and the contents of nicotine, potassium oxide and total nitrogen of the cured leaves were positively correlated to the amount of N application”
e1“on tobacco. The result indicated”
Claim · model-written summary
Nicotine, potassium oxide and total nitrogen content rose with nitrogen application amount.
- Taxon
- tobaccoNicotiana tabacume1
- Organ / stage
- cured leavese0
- Treatment
- amount of N applicatione0
- Outcome
- contents of nicotine, potassium oxide and total nitrogene0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“contents of nicotine, potassium oxide and total nitrogen of the cured leaves were positively correlated to the amount of N application”
e1“on tobacco. The result indicated”
Claim · model-written summary
Superior-medium class leaf percentage and deoxidize sugar content were negatively correlated with nitrogen amount.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- amount of N applicatione1
- Outcome
- percentage of superior-medium class leaves of tobacco and contents of deoxidize sugare0
- Direction
- negatively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significantly and negatively correlated to the percentage of superior-medium class leaves of tobacco and contents of deoxidize sugar”
e1“amount of N application”
Claim · model-written summary
Applying 75 kg N per hectare gave the highest tobacco yield and best quality.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- applying 75 kg N per hectaree0
- Outcome
- yield and best qualitye0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest yield and best quality of tobacco were obtained by applying 75 kg N per hectare”
Claim · model-written summary
Inorganic fertilizer significantly improved tobacco yield and quality versus organic fertilizer.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- Inorganic nitrogenous fertilizere0
- Outcome
- yield and qualitye0
- Direction
- improvee0
- Comparator
- organic nitrogenous fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inorganic nitrogenous fertilizer could significantly improve the yield and quality of tobacco, compared with organic nitrogenous fertilizer”
Claim · model-written summary
Ammonium, nitrate and nitrate-ammonium nitrogen applications did not differ significantly.
- Treatment
- ammonium N, nitrate N and nitrate-ammonium N applicatione0
- Outcome
- tobacco yield and qualitye1
- Direction
- no significant differencee0
Not reportedTaxonComparator
Verbatim
e0“there was no significant difference among ammonium N, nitrate N and nitrate-ammonium N application”
e1“tobacco yield and quality”
Claim · model-written summary
Ammonium, nitrate and nitrate-ammonium nitrogen performed significantly better than urea.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- ammonium N, nitrate N, and nitrate-ammoniun N applicatione0
- Outcome
- tobacco yield and qualitye1
- Direction
- highere0
- Comparator
- urea applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effects of ammonium N, nitrate N, and nitrate-ammoniun N application were significantly higher than that of urea application”
e1“tobacco yield and quality”
Claim · model-written summary
Ammonium N gave better tobacco yield and quality than nitrate N.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- ammoniun N applicatione0
- Outcome
- tobacco yield and qualitye0
- Direction
- bettere0
- Comparator
- nitrate N applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of ammoniun N application on tobacco yield and quality was better than that of nitrate N application”
Claim · model-written summary
Authors attributed the ammonium versus nitrate result to differences in nitrogen absorption and assimilation.
- Taxon
- tobaccoNicotiana tabacume1
- Outcome
- tobacco yield and qualitye1
- Qualifier
- process of absorption and assimilation of ammoniun N and nitrate Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“important reason was the great difference in the process of absorption and assimilation of ammoniun N and nitrate N”
e1“effect of ammoniun N application on tobacco yield and quality was better than that of nitrate N application”
The same questions in other papers
nitrogen · quality: general · Nicotiana tabacum (tobacco)Positive and negative results
27 papers in the same direction as this paper · 9 in the opposite direction · 2 reporting no difference from an alternative
- no effect
- negative
- no effect
35 papers more in this group
See all 39 papers →fertilization · quality: general · Nicotiana tabacum (tobacco)Positive and negative results
124 papers in the same direction as this paper · 13 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- no effect
135 papers more in this group
See all 139 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.