Abstract
SummaryThe responses of January-sown cucumbers to a range of CO2 concentrations in winter and in summer were examined together with a non-enriched treatment. In winter the CO2 concentration in the glasshouses was ambient, 400 or 1000 vpm, and in the summer, 350, 380, 400 or 450 vpm.Winter CO2 enrichment to 1000 vpm produced large increases in growth by early March. Mean CO2 concentration in the ambient treatment during this period was 370 vpm and there were no differences between the effect of this and the 400 vpm treatment. Fruit yield by mid-April was doubled when CO2 level was maintained at 400 vpm and trebled when the level was raised to 1000 vpm. Gross monetary value was similarly increased. CO2 enrichment also increased mean fruit weight, by 10% at 400 vpm and 23% at 1000 vpm. During April the mean CO2 concentration in the non-enriched treatments averaged 262 vpm with some daily means falling below 200 vpm. With summertime CO2 enrichment fruit yields and gross monetary values improved with increasing CO2. Maintaining levels of 350, 380,400 or 450 vpm CO2 increased total fruit yields by 5,11,15 and 22%. Fruit yield was linearly related to mean CO2 concentration. Between 318 and 455 vpm CO2, fruit yield increased by 54 g m−2 for each vpm increase in mean summertime CO2 concentration. The enrichment treatments were cost-effective.
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Claims 14
Claim · model-written summary
Winter CO2 enrichment to 1000 vpm increased cucumber growth by early March.
- Taxon
- cucumber
Cucumis sativust0 - Treatment
- CO2 enrichment to 1000 vpme0
- Outcome
- growthe0
- Direction
- increasese0
- Setting
- glasshouset0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“glasshouse cucumber”
e0“Winter CO2 enrichment to 1000 vpm produced large increases in growth by early March.”
Claim · model-written summary
Ambient winter CO2 and 400 vpm had no different effect.
- Taxon
- cucumberCucumis sativust0
- Treatment
- 400 vpm treatmente0
- Outcome
- effecte0
- Direction
- no differencese0
- Comparator
- thise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“glasshouse cucumber”
e0“there were no differences between the effect of this and the 400 vpm treatment.”
Claim · model-written summary
Maintaining winter CO2 at 400 vpm doubled fruit yield by mid-April.
- Taxon
- cucumberCucumis sativust0
- Treatment
- CO2 level was maintained at 400 vpme0
- Outcome
- Fruit yielde0
- Direction
- doublede0
- Qualifier
- by mid-Aprile0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“glasshouse cucumber”
e0“Fruit yield by mid-April was doubled when CO2 level was maintained at 400 vpm”
Claim · model-written summary
Raising winter CO2 to 1000 vpm trebled fruit yield by mid-April.
- Taxon
- cucumberCucumis sativust0
- Treatment
- the level was raised to 1000 vpme0
- Outcome
- Fruit yielde0
- Direction
- treblede0
- Qualifier
- by mid-Aprile0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“glasshouse cucumber”
e0“Fruit yield by mid-April was doubled when CO2 level was maintained at 400 vpm and trebled when the level was raised to 1000 vpm.”
Claim · model-written summary
Winter CO2 enrichment similarly increased gross monetary value.
- Taxon
- cucumberCucumis sativust0
- Treatment
- CO2 enrichmente1
- Outcome
- Gross monetary valuee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“glasshouse cucumber”
e0“Gross monetary value was similarly increased.”
e1“Winter CO2 enrichment to 1000 vpm produced large increases in growth by early March.”
Claim · model-written summary
CO2 enrichment at 400 vpm increased mean fruit weight by 10%.
- Taxon
- cucumberCucumis sativust0
- Treatment
- CO2 enrichmente0
- Outcome
- mean fruit weighte0
- Direction
- increasede0
- Value
- 10%e0
- Qualifier
- at 400 vpme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“glasshouse cucumber”
e0“CO2 enrichment also increased mean fruit weight, by 10% at 400 vpm”
Claim · model-written summary
CO2 enrichment at 1000 vpm increased mean fruit weight by 23%.
- Taxon
- cucumberCucumis sativust0
- Treatment
- CO2 enrichmente0
- Outcome
- mean fruit weighte0
- Direction
- increasede0
- Value
- 23%e0
- Qualifier
- at 1000 vpme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“glasshouse cucumber”
e0“CO2 enrichment also increased mean fruit weight, by 10% at 400 vpm and 23% at 1000 vpm.”
Claim · model-written summary
Summer CO2 enrichment increased fruit yields and gross monetary values with increasing CO2.
- Taxon
- cucumberCucumis sativust0
- Treatment
- summertime CO2 enrichmente0
- Outcome
- fruit yields and gross monetary valuese0
- Direction
- improvede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“glasshouse cucumber”
e0“With summertime CO2 enrichment fruit yields and gross monetary values improved with increasing CO2.”
Claim · model-written summary
Summer CO2 at 350 vpm increased total fruit yield by 5%.
- Taxon
- cucumberCucumis sativust0
- Treatment
- 350e0
- Outcome
- total fruit yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“glasshouse cucumber”
e0“Maintaining levels of 350, 380,400 or 450 vpm CO2 increased total fruit yields by 5,11,15 and 22%.”
Claim · model-written summary
Summer CO2 at 380 vpm increased total fruit yield by 11%.
- Taxon
- cucumberCucumis sativust0
- Treatment
- 380e0
- Outcome
- total fruit yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“glasshouse cucumber”
e0“Maintaining levels of 350, 380,400 or 450 vpm CO2 increased total fruit yields by 5,11,15 and 22%.”
Claim · model-written summary
Summer CO2 at 400 vpm increased total fruit yield by 15%.
- Taxon
- cucumberCucumis sativust0
- Treatment
- 400e0
- Outcome
- total fruit yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“glasshouse cucumber”
e0“Maintaining levels of 350, 380,400 or 450 vpm CO2 increased total fruit yields by 5,11,15 and 22%.”
Claim · model-written summary
Summer CO2 at 450 vpm increased total fruit yield by 22%.
- Taxon
- cucumberCucumis sativust0
- Treatment
- 450 vpm CO2e0
- Outcome
- total fruit yieldse0
- Direction
- increasede0
- Value
- 22%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“glasshouse cucumber”
e0“Maintaining levels of 350, 380,400 or 450 vpm CO2 increased total fruit yields by 5,11,15 and 22%.”
Claim · model-written summary
Summer fruit yield was linearly related to mean CO2 concentration, rising 54 g m−2 per vpm between 318 and 455 vpm.
- Taxon
- cucumberCucumis sativust0
- Treatment
- CO2 concentratione0
- Outcome
- Fruit yielde0
- Direction
- increasede0
- Value
- 54 g m−2e0
- Qualifier
- Between 318 and 455 vpm CO2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“glasshouse cucumber”
e0“Fruit yield was linearly related to mean CO2 concentration. Between 318 and 455 vpm CO2, fruit yield increased by 54 g m−2 for each vpm increase in mean summertime CO2 concentration.”
Claim · model-written summary
CO2 enrichment treatments were cost-effective.
- Taxon
- cucumberCucumis sativust0
- Treatment
- enrichment treatmentse0
- Outcome
- cost-effectivee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“glasshouse cucumber”
e0“The enrichment treatments were cost-effective.”
The same questions in other papers
co2 · yield · Cucumis sativus (cucumber)Results differ
13 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
12 papers more in this group
See all 16 papers →co2 · growth · Cucumis sativus (cucumber)Positive and negative results
17 papers in the same direction as this paper · 2 in the opposite direction
- positive
- negative
- negative
16 papers more in this group
See all 20 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.