Abstract
Abstract Presently in Cyprus, tobacco ( Nicotiana tabacum L.) is grown under supplementary irrigation with water high in CI. The present study sought to investigate the irrigation/yield relationship and the attendant concentration of CI and other constituents in the leaves. In three experiments in which one to six irrigations were tested, maximum evapotranspiration (ET) determined by the soil water balance method was reached 40 to 50 days after planting, and equaled evaporation from a screened Class A pan. The ET started declining just before the first leaf harvest, even though soil water was adequate. However, since soil water became limiting soon afterwards, the course of potential ET could not be followed. From the second leaf harvest until the end of the season, ET was very low (< 1 mm/day). Fresh yield increased from 12 Mg/ha with 60 mm irrigation to 28 Mg/ha with 360 mm irrigation, the highest amount tested. In contrast, dry matter yield only increased from 2.3 to 4.2 Mg/ha, respectively. Moreover, midrib material increased from 20% with 60 mm irrigation to 30% of the total leaf dry matter with 300 mm irrigation. Concentration of CI for the whole leaf increased from about 2% with 60 mm irrigation to 3% with 300 mm irrigation (disregarding the last sampling). Concentration of K decreased from 4 to 2% between the first and the third harvest and in one experiment it tended to increase with irrigation. Leaf P increased from about 0.1 with 60 mm irrigation to 0.2% with 180 mm irrigation. The burn rate of laminae, determined in one experiment, increased with irrigation, even though CI also increased.
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Claims 11
Claim · model-written summary
Fresh yield rose from 12 to 28 Mg/ha as irrigation increased from 60 to 360 mm in tobacco.
- Taxon
- Nicotiana tabacum
Nicotiana tabacume0 - Treatment
- 360 mm irrigatione1
- Outcome
- Fresh yielde1
- Direction
- increasede1
- Value
- 28 Mg/hae1
- Qualifier
- from 12 Mg/ha with 60 mm irrigatione1
- Comparator
- 60 mm irrigatione1
- Setting
- Cypruse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Presently in Cyprus, tobacco ( Nicotiana tabacum L.) is grown under supplementary irrigation”
e1“Fresh yield increased from 12 Mg/ha with 60 mm irrigation to 28 Mg/ha with 360 mm irrigation”
Claim · model-written summary
Dry matter yield rose only from 2.3 to 4.2 Mg/ha as irrigation increased from 60 to 360 mm.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Treatment
- 360 mm irrigatione1
- Outcome
- dry matter yielde2
- Direction
- increasede2
- Value
- 4.2 Mg/hae2
- Qualifier
- from 2.3e2
- Comparator
- 60 mm irrigatione1
- Setting
- Cypruse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Presently in Cyprus, tobacco ( Nicotiana tabacum L.) is grown under supplementary irrigation”
e1“Fresh yield increased from 12 Mg/ha with 60 mm irrigation to 28 Mg/ha with 360 mm irrigation”
e2“dry matter yield only increased from 2.3 to 4.2 Mg/ha”
Claim · model-written summary
Midrib material rose from 20% to 30% of total leaf dry matter as irrigation increased from 60 to 300 mm.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Organ / stage
- midribe3
- Treatment
- 300 mm irrigatione3
- Outcome
- midrib materiale3
- Direction
- increasede3
- Value
- 30%e3
- Qualifier
- from 20%e3
- Comparator
- 60 mm irrigatione3
- Setting
- Cypruse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Presently in Cyprus, tobacco ( Nicotiana tabacum L.) is grown under supplementary irrigation”
e3“midrib material increased from 20% with 60 mm irrigation to 30% of the total leaf dry matter with 300 mm irrigation”
Claim · model-written summary
Whole-leaf CI concentration rose from about 2% to 3% as irrigation increased from 60 to 300 mm.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Organ / stage
- whole leafe4
- Treatment
- 300 mm irrigatione4
- Outcome
- Concentration of CIe4
- Direction
- increasede4
- Value
- 3%e4
- Qualifier
- from about 2%e4
- Comparator
- 60 mm irrigatione4
- Setting
- Cypruse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Presently in Cyprus, tobacco ( Nicotiana tabacum L.) is grown under supplementary irrigation”
e4“Concentration of CI for the whole leaf increased from about 2% with 60 mm irrigation to 3% with 300 mm irrigation”
Claim · model-written summary
Leaf K concentration decreased from 4% to 2% between the first and the third harvest.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Outcome
- Concentration of Ke5
- Direction
- decreasede5
- Value
- 4 to 2%e5
- Qualifier
- between the first and the third harveste5
- Setting
- Cypruse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Presently in Cyprus, tobacco ( Nicotiana tabacum L.) is grown under supplementary irrigation”
e5“Concentration of K decreased from 4 to 2% between the first and the third harvest”
Claim · model-written summary
In one experiment, leaf K concentration tended to increase with irrigation.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Treatment
- irrigatione6
- Outcome
- Concentration of Ke5
- Direction
- increasee6
- Qualifier
- in one experimente6
- Setting
- Cypruse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Presently in Cyprus, tobacco ( Nicotiana tabacum L.) is grown under supplementary irrigation”
e5“Concentration of K decreased from 4 to 2% between the first and the third harvest”
e6“in one experiment it tended to increase with irrigation”
Claim · model-written summary
Leaf P concentration rose from about 0.1% to 0.2% as irrigation increased from 60 to 180 mm.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Organ / stage
- Leafe7
- Treatment
- 180 mm irrigatione7
- Outcome
- Leaf Pe7
- Direction
- increasede7
- Value
- 0.2%e7
- Qualifier
- from about 0.1e7
- Comparator
- 60 mm irrigatione7
- Setting
- Cypruse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Presently in Cyprus, tobacco ( Nicotiana tabacum L.) is grown under supplementary irrigation”
e7“Leaf P increased from about 0.1 with 60 mm irrigation to 0.2% with 180 mm irrigation”
Claim · model-written summary
Burn rate of laminae increased with irrigation in one experiment.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Organ / stage
- laminaee1
- Treatment
- irrigatione1
- Outcome
- burn ratee1
- Direction
- increasede1
- Qualifier
- even though CI also increasede1
- Setting
- Cypruse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Presently in Cyprus, tobacco ( Nicotiana tabacum L.) is grown under supplementary irrigation”
e1“The burn rate of laminae, determined in one experiment, increased with irrigation, even though CI also increased”
Claim · model-written summary
Maximum evapotranspiration was reached 40 to 50 days after planting and equaled evaporation from a screened Class A pan.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Outcome
- maximum evapotranspiration (ET)e2
- Value
- 40 to 50 days after plantinge2
- Qualifier
- equaled evaporation from a screened Class A pane2
- Setting
- Cypruse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Presently in Cyprus, tobacco ( Nicotiana tabacum L.) is grown under supplementary irrigation”
e2“maximum evapotranspiration (ET) determined by the soil water balance method was reached 40 to 50 days after planting, and equaled evaporation from a screened Class A pan”
Claim · model-written summary
ET started declining just before the first leaf harvest.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Outcome
- ETe3
- Qualifier
- just before the first leaf harveste3
- Setting
- Cypruse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Presently in Cyprus, tobacco ( Nicotiana tabacum L.) is grown under supplementary irrigation”
e3“The ET started declining just before the first leaf harvest”
Claim · model-written summary
ET was very low (<1 mm/day) from the second leaf harvest to the end of the season.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Outcome
- ETe4
- Value
- < 1 mm/daye4
- Qualifier
- From the second leaf harvest until the end of the seasone4
- Setting
- Cypruse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Presently in Cyprus, tobacco ( Nicotiana tabacum L.) is grown under supplementary irrigation”
e4“From the second leaf harvest until the end of the season, ET was very low (< 1 mm/day)”
The same questions in other papers
irrigation · yield · Nicotiana tabacum (tobacco)Positive and negative results
16 papers in the same direction as this paper · 6 in the opposite direction
- no effect
- negative
- negative
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.