Abstract
In order to ascertain the effect of N and K fertilizer applied methods on flue-cured tobacco growth and soil inorganic nitrogen content,a field experiment was conducted to investigate the effect of N and K fertilizer applied methods on flue-cured agronomic characters and NO-3-N and NH+4-N contents by setting different dressing proportion of N and K,and KNO3 diluted separately several times in vigorous growth stage and round top stage.Results showed that adequate basal fertilizer contributed to tobacco grouping in resettling stage,diluted KNO3 could significantly improve flue-cured tobacco agronomic characters and promote upper leaves opening.But topdressing ratio too much(50%to 70%tobacco specific fertilizer applied in earthing up stage)was not conducive to tobacco normal yellowing.In all respects,the treatment that base and topdressing ratio was 7∶3,and all KNO3 was diluted separately for three times during the vigorous growth stage to round top stage was most effective.KNO3 diluted in vigorous growth stage and round top stage could significantly increase NO-3-N content in 0-20 cm soil layer and the content increased with the increase of tobacco special fertilizer topdressing proportion during7th-11 th weeks after tobacco transplanting.NH+4-N content in 0-20 cm increased with the increase of tobacco special fertilizer topdressing proportion during 7th-11 th weeks after tobacco transplanting,but was less affected by KNO3 diluted in vigorous growth stage and round top stage.So,the treatment that base and topdressing ratio was 7∶3,and KNO3 diluted was also applied during the vigorous growth stage to round top stage was most effective for improving fluecured tobacco growth,and also influenced NO-3-N and NH+4-N contents of soil in different degrees.
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Claims 9
Claim · model-written summary
Adequate basal fertilizer contributed to tobacco grouping in the resettling stage.
- Taxon
- Flue-cured Tobaccot0
- Organ / stage
- resettling stagee1
- Treatment
- adequate basal fertilizere1
- Outcome
- tobacco groupinge1
Not reportedComparatorDirection
Verbatim
e1“adequate basal fertilizer contributed to tobacco grouping in resettling stage”
t0“Flue-cured Tobacco”
Claim · model-written summary
Diluted KNO3 significantly improved flue-cured tobacco agronomic characters.
Not reportedComparator
Verbatim
e2“diluted KNO3 could significantly improve flue-cured tobacco agronomic characters and promote upper leaves opening”
t0“Flue-cured Tobacco”
Claim · model-written summary
Diluted KNO3 promoted upper leaves opening in flue-cured tobacco.
- Taxon
- flue-cured tobaccoe2
- Organ / stage
- upper leavese2
- Treatment
- diluted KNO3e2
- Outcome
- upper leaves openinge2
- Direction
- promotee2
Not reportedComparator
Verbatim
e2“diluted KNO3 could significantly improve flue-cured tobacco agronomic characters and promote upper leaves opening”
t0“Flue-cured Tobacco”
Claim · model-written summary
A topdressing ratio that was too high (50% to 70% of tobacco special fertilizer at earthing-up) was not conducive to normal yellowing of tobacco.
- Taxon
- tobacco
Nicotiana tabacume3 - Treatment
- topdressing ratio too muche3
- Outcome
- normal yellowinge3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“topdressing ratio too much(50%to 70%tobacco specific fertilizer applied in earthing up stage)was not conducive to tobacco normal yellowing”
Claim · model-written summary
The base and topdressing ratio of 7:3 with KNO3 diluted three times from the vigorous growth stage to the round-top stage was the most effective treatment.
- Taxon
- Flue-cured Tobaccot0
- Treatment
- KNO3 was diluted separately for three timese4
- Outcome
- most effectivee4
- Direction
- most effectivee4
Not reportedComparator
Verbatim
e4“the treatment that base and topdressing ratio was 7∶3,and all KNO3 was diluted separately for three times during the vigorous growth stage to round top stage was most effective”
t0“Flue-cured Tobacco”
Claim · model-written summary
Diluted KNO3 significantly increased NO3-N content in the 0-20 cm soil layer.
- Taxon
- Flue-cured Tobaccot0
- Treatment
- KNO3 diluted in vigorous growth stage and round top stagee5
- Outcome
- NO-3-N content in 0-20 cm soil layere5
- Direction
- significantly increasee5
Not reportedComparator
Verbatim
e5“KNO3 diluted in vigorous growth stage and round top stage could significantly increase NO-3-N content in 0-20 cm soil layer”
t0“Flue-cured Tobacco”
Claim · model-written summary
NO3-N content in the 0-20 cm soil layer increased with higher tobacco special fertilizer topdressing proportion during weeks 7-11 after transplanting.
- Taxon
- tobaccoNicotiana tabacume6
- Treatment
- tobacco special fertilizer topdressing proportione6
- Outcome
- NO-3-N content in 0-20 cm soil layere5
- Direction
- increasede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“KNO3 diluted in vigorous growth stage and round top stage could significantly increase NO-3-N content in 0-20 cm soil layer”
e6“the content increased with the increase of tobacco special fertilizer topdressing proportion”
Claim · model-written summary
NH4-N content in the 0-20 cm soil layer increased with higher tobacco special fertilizer topdressing proportion during weeks 7-11 after transplanting.
- Taxon
- tobaccoNicotiana tabacume7
- Treatment
- tobacco special fertilizer topdressing proportione7
- Outcome
- NH+4-N content in 0-20 cme7
- Direction
- increasede7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“NH+4-N content in 0-20 cm increased with the increase of tobacco special fertilizer topdressing proportion”
Claim · model-written summary
NH4-N content in the 0-20 cm soil layer was less affected by diluted KNO3 in the vigorous growth and round-top stages.
- Taxon
- tobaccoNicotiana tabacume7
- Treatment
- KNO3 diluted in vigorous growth stage and round top stagee0
- Outcome
- NH+4-N content in 0-20 cme7
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but was less affected by KNO3 diluted in vigorous growth stage and round top stage”
e7“NH+4-N content in 0-20 cm increased with the increase of tobacco special fertilizer topdressing proportion”
The same questions in other papers
fertilization · disease · Nicotiana tabacum (tobacco)Positive and negative results
1 paper in the same direction as this paper · 31 in the opposite direction
- positive
- positive
- positive
29 papers more in this group
See all 33 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.