Abstract
Abstract Field studies were conducted in 1983 and 1984 at Lexington, KY to examine the effects of N and K fertilizer on yield and chemical quality of burley tobacco ( Nicotiana tabacum L. cv. Ky 14). Treatments included: NH 4 NO 3 at rates of 112, 280, and 448 kg N ha −1 ; and two sources (K 2 SO 4 and KCl), each at rates of 0, 112, 224, and 448 kg K ha −1 . The following agronomic and chemical characteristics were examined: yield, price, leaf N, P, K, Ca, Mg, Cl, Mo, total alkaloid, and solanesol concentrations. Cured leaf yield, price, and solanesol concentration were strongly influenced by N × K interactions. Each was raised by increasing N rates when no K was applied; however, at higher K levels, increasing N rates resulted in smaller price increases, no yield changes, and reductions in solanesol concentrations. Reductions in cured leaf Mo concentration relative to N, K, and Mg levels with increasing K fertilization beyond 0 kg ha −1 were exaggerated as N rates were raised. No effect of N rates on total alkaloids or solanesol concentrations were noted while increased K rates increased concentrations of both. Greater cured leaf yields and Mo concentrations were achieved with KCl than with K 2 SO 4 . The positive effect of KCl on Mo concentration at low N application rates was reduced by increased N fertilization suggesting that Mo uptake was enhanced by Cl ‐ but reversed at high levels of NO ‐ 3 application.
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Claims 11
Claim · model-written summary
In burley tobacco, cured leaf yield, price and solanesol concentration were strongly influenced by N x K fertilizer interactions.
- Taxon
- burley tobaccoe0
- Treatment
- N × K interactionse1
- Outcome
- Cured leaf yield, price, and solanesol concentratione1
Not reportedMaterialGeneCompoundOrgan / stageComparatorSettingDirectionValueQualifier
Verbatim
e0“burley tobacco”
e1“Cured leaf yield, price, and solanesol concentration were strongly influenced by N × K interactions”
Claim · model-written summary
In burley tobacco, increasing N rates raised cured leaf yield, price and solanesol concentration when no K was applied.
- Taxon
- burley tobaccoe0
- Treatment
- increasing N ratese1
- Outcome
- Cured leaf yield, price, and solanesol concentratione2
- Direction
- raisede1
- Qualifier
- no K was appliede1
Not reportedMaterialGeneCompoundOrgan / stageComparatorSettingValue
Verbatim
e0“burley tobacco”
e1“Each was raised by increasing N rates when no K was applied”
e2“Cured leaf yield, price, and solanesol concentration”
Claim · model-written summary
At higher K levels, increasing N rates gave smaller price increases in burley tobacco.
- Taxon
- burley tobaccoe0
- Treatment
- increasing N ratese1
- Outcome
- pricee1
- Direction
- smaller price increasese1
- Qualifier
- at higher K levelse1
Not reportedMaterialGeneCompoundOrgan / stageComparatorSettingValue
Verbatim
e0“burley tobacco”
e1“at higher K levels, increasing N rates resulted in smaller price increases, no yield changes, and reductions in solanesol concentrations”
Claim · model-written summary
At higher K levels, increasing N rates produced no change in cured leaf yield of burley tobacco.
- Taxon
- burley tobaccoe0
- Treatment
- increasing N ratese1
- Outcome
- yielde1
- Direction
- no yield changese1
- Qualifier
- at higher K levelse1
Not reportedMaterialGeneCompoundOrgan / stageComparatorSettingValue
Verbatim
e0“burley tobacco”
e1“at higher K levels, increasing N rates resulted in smaller price increases, no yield changes, and reductions in solanesol concentrations”
Claim · model-written summary
At higher K levels, increasing N rates reduced solanesol concentrations in burley tobacco.
- Taxon
- burley tobaccoe0
- Treatment
- increasing N ratese1
- Outcome
- solanesol concentrationse1
- Direction
- reductionse1
- Qualifier
- at higher K levelse1
Not reportedMaterialGeneCompoundOrgan / stageComparatorSettingValue
Verbatim
e0“burley tobacco”
e1“at higher K levels, increasing N rates resulted in smaller price increases, no yield changes, and reductions in solanesol concentrations”
Claim · model-written summary
Increasing K fertilization beyond 0 kg ha-1 reduced cured leaf Mo concentration relative to N, K and Mg levels, and the reduction was exaggerated as N rates were raised.
- Taxon
- burley tobaccoe0
- Treatment
- increasing K fertilizatione1
- Outcome
- cured leaf Mo concentratione1
- Direction
- Reductionse1
- Qualifier
- exaggerated as N rates were raisede1
- Comparator
- 0 kg ha −1e1
Not reportedMaterialGeneCompoundOrgan / stageSettingValue
Verbatim
e0“burley tobacco”
e1“Reductions in cured leaf Mo concentration relative to N, K, and Mg levels with increasing K fertilization beyond 0 kg ha −1 were exaggerated as N rates were raised”
Claim · model-written summary
N rates had no effect on total alkaloid or solanesol concentrations in burley tobacco.
- Taxon
- burley tobaccoe0
- Treatment
- N ratese1
- Outcome
- total alkaloids or solanesol concentrationse1
- Direction
- No effecte1
Not reportedMaterialGeneCompoundOrgan / stageComparatorSettingValueQualifier
Verbatim
e0“burley tobacco”
e1“No effect of N rates on total alkaloids or solanesol concentrations were noted”
Claim · model-written summary
Increased K rates increased total alkaloid and solanesol concentrations in burley tobacco.
- Taxon
- burley tobaccoe0
- Treatment
- increased K ratese1
- Outcome
- total alkaloids or solanesol concentrationse1
- Direction
- increasede1
Not reportedMaterialGeneCompoundOrgan / stageComparatorSettingValueQualifier
Verbatim
e0“burley tobacco”
e1“No effect of N rates on total alkaloids or solanesol concentrations were noted while increased K rates increased concentrations of both”
Claim · model-written summary
Cured leaf yields and Mo concentrations were greater with KCl than with K2SO4.
- Taxon
- burley tobaccoe0
- Treatment
- KCle1
- Outcome
- cured leaf yields and Mo concentrationse1
- Direction
- Greatere1
- Comparator
- K 2 SO 4e1
Not reportedMaterialGeneCompoundOrgan / stageSettingValueQualifier
Verbatim
e0“burley tobacco”
e1“Greater cured leaf yields and Mo concentrations were achieved with KCl than with K 2 SO 4”
Claim · model-written summary
The positive effect of KCl on Mo concentration at low N application rates was reduced by increased N fertilization.
- Taxon
- burley tobaccoe0
- Treatment
- KCle1
- Outcome
- Mo concentratione1
- Direction
- positive effecte1
- Qualifier
- reduced by increased N fertilizatione1
Not reportedMaterialGeneCompoundOrgan / stageComparatorSettingValue
Verbatim
e0“burley tobacco”
e1“The positive effect of KCl on Mo concentration at low N application rates was reduced by increased N fertilization”
Claim · model-written summary
The authors suggest that Mo uptake was enhanced by chloride but reversed at high levels of nitrate application.
Not reportedMaterialGeneOrgan / stageTreatmentComparatorSettingDirectionValueQualifier
Verbatim
e0“burley tobacco”
e1“Mo uptake was enhanced by Cl ‐ but reversed at high levels of NO ‐ 3 application”
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