Abstract
A field study was carried out from 2003 to 2004 in order to determine the effect of different soil moisture regimes and water stress imposed throughout vegetative growth stages of Coker 347 (flue-cured) tobacco plant (Nicotiana tabacum L.). A randomized block design with five treatments and three replications was applied at Rasht Tobacco Research Station in Guilan provience, Iran. Treatments were 40, 60, 80 and 100% of total available water (TAW) and non irrigated (dryland farming) as a control. At the end of flowering stage, some traits which were related to yield and also quality characteristics of tobacco plants were measured. The combined analysis of variance showed that all the traits except number of leaves per plant, sugar percentage, and nicotine percentage were affected by TAW. The effect of year was significant on traits of yield components and quality treats due to the high precipitations in the second experimental year. Furthermore, the effect of year was no significant on the traits related to yield except for fresh leaf yield. However, the treatment of 40% of total available water (TAW1) was the best in fresh leaf yield, dry leaf yield, unit price and gross income in unit area. The non irrigated treatment (TAW0) was the lowest in fresh leaf yield, dry leaf yield, unit price and gross income in unit area. In addition the values of nicotine percentage and sugar to nicotine ratio for all of the treatments were higher and lower than their common levels, respectively.
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Claims 11
Claim · model-written summary
Total available water affected tobacco traits except leaf number, sugar percentage, and nicotine percentage.
- Taxon
- tobacco
Nicotiana tabacumt0 - Treatment
- TAWe0
- Outcome
- all the traitse0
- Qualifier
- except number of leaves per plant, sugar percentage, and nicotine percentagee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all the traits except number of leaves per plant, sugar percentage, and nicotine percentage were affected by TAW.”
t0“tobacco”
Claim · model-written summary
Total available water did not significantly affect tobacco leaf number, sugar percentage, or nicotine percentage.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- TAWe0
- Outcome
- number of leaves per plant, sugar percentage, and nicotine percentagee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all the traits except number of leaves per plant, sugar percentage, and nicotine percentage were affected by TAW.”
t0“tobacco”
Claim · model-written summary
Year significantly affected tobacco yield components and quality traits.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- traits of yield components and quality treatse0
- Qualifier
- high precipitationse0
- Setting
- second experimental yeare0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of year was significant on traits of yield components and quality treats due to the high precipitations in the second experimental year.”
t0“tobacco”
Claim · model-written summary
Year did not significantly affect tobacco yield traits other than fresh leaf yield.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- traits related to yielde0
- Qualifier
- except for fresh leaf yielde0
- Setting
- yeare0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of year was no significant on the traits related to yield except for fresh leaf yield.”
t0“tobacco”
Claim · model-written summary
Year affected fresh leaf yield in tobacco.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- fresh leaf yielde0
- Setting
- yeare0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of year was no significant on the traits related to yield except for fresh leaf yield.”
t0“tobacco”
Claim · model-written summary
The 40% total available water treatment gave the best fresh and dry leaf yields in tobacco.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- 40% of total available water (TAW1)e0
- Outcome
- fresh leaf yield, dry leaf yielde0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the treatment of 40% of total available water (TAW1) was the best in fresh leaf yield, dry leaf yield, unit price and gross income in unit area.”
t0“tobacco”
Claim · model-written summary
The 40% total available water treatment gave the best tobacco unit price and gross income per unit area.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- 40% of total available water (TAW1)e0
- Outcome
- unit price and gross income in unit areae0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the treatment of 40% of total available water (TAW1) was the best in fresh leaf yield, dry leaf yield, unit price and gross income in unit area.”
t0“tobacco”
Claim · model-written summary
Non-irrigated tobacco had the lowest fresh and dry leaf yields.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- non irrigated treatment (TAW0)e0
- Outcome
- fresh leaf yield, dry leaf yielde0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The non irrigated treatment (TAW0) was the lowest in fresh leaf yield, dry leaf yield, unit price and gross income in unit area.”
t0“tobacco”
Claim · model-written summary
Non-irrigated tobacco had the lowest unit price and gross income per unit area.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- non irrigated treatment (TAW0)e0
- Outcome
- unit price and gross income in unit areae0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The non irrigated treatment (TAW0) was the lowest in fresh leaf yield, dry leaf yield, unit price and gross income in unit area.”
t0“tobacco”
Claim · model-written summary
Tobacco nicotine percentage exceeded common levels under every treatment.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- nicotine percentagee0
- Direction
- highere0
- Qualifier
- all of the treatmentse0
- Comparator
- common levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the values of nicotine percentage and sugar to nicotine ratio for all of the treatments were higher and lower than their common levels, respectively.”
t0“tobacco”
Claim · model-written summary
Tobacco sugar-to-nicotine ratio was below common levels under every treatment.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- sugar to nicotine ratioe0
- Direction
- lowere0
- Qualifier
- all of the treatmentse0
- Comparator
- common levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the values of nicotine percentage and sugar to nicotine ratio for all of the treatments were higher and lower than their common levels, respectively.”
t0“tobacco”
The same questions in other papers
irrigation · yield · Nicotiana tabacum (tobacco)Positive and negative results
5 papers in the same direction as this paper · 17 in the opposite direction
- positive
- positive
- positive
19 papers more in this group
See all 23 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.