Abstract
Increase in ambient carbon dioxide (CO 2 ) concentration is beneficial for plant growth due to increased photosynthesis and water use efficiency. A greenhouse study was conducted to investigate how supplemented CO 2 influences optimal irrigation and fertilization management for production of two ornamental plants. Two identical greenhouses were used, with one having CO 2 supplementation and the other serving as the control with ambient CO 2 concentration. Tensiometer-based irrigation treatments were applied at soil tensions of –5, –10, and –15 kPa with 0-, 3-, 6-, or 9-g controlled-release fertilizer rates applied in factorial with irrigation treatments. Plugs of geranium ‘Pinto Premium Rose Bicolor’ and fountain grass were grown under experimental conditions for 12 and 16 weeks, respectively. The results showed that CO 2 supplementation increased the dry weight of geranium ‘Pinto Premium Rose Bicolor’ and fountain grass by 35% and 39%, respectively. Under the two driest irrigation regimes (–10 and –15 kPa), photosynthesis of geranium ‘Pinto Premium Rose Bicolor’ increased with CO 2 supplementation compared with the ambient condition. Similarly, for fountain grass, the moderately watered (–10 kPa) treatment had a greater rate of photosynthesis with greater fertilizer rates of 6 or 9 g. CO 2 supplementation resulted in increased water use efficiency of both species, whereas rate of transpiration was lower only in fountain grass. Among different fertilizer rates, 6- or 9-g fertilizer rates had greater values for dry weight, number of flowers, and stomatal conductance in both species. Therefore, it can be concluded that CO 2 supplementation can help in efficient use of water for greenhouse production of ornamental plants.
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Claims 9
Claim · model-written summary
CO 2 supplementation increased geranium dry weight by 35%.
- Material
- Pinto Premium Rose Bicolore0
- Treatment
- CO 2 supplementatione0
- Outcome
- dry weighte0
- Direction
- increasede0
- Value
- 35%e0
GeraniumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that CO 2 supplementation increased the dry weight of geranium ‘Pinto Premium Rose Bicolor’ and fountain grass by 35% and 39%, respectively.”
Claim · model-written summary
CO 2 supplementation increased fountain grass dry weight by 39%.
- Taxon
- fountain grass
Cenchrus setaceuse0 - Treatment
- CO 2 supplementatione0
- Outcome
- dry weighte0
- Direction
- increasede0
- Value
- 39%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that CO 2 supplementation increased the dry weight of geranium ‘Pinto Premium Rose Bicolor’ and fountain grass by 35% and 39%, respectively.”
Claim · model-written summary
Geranium photosynthesis increased with CO 2 supplementation under the two driest irrigation regimes.
- Material
- Pinto Premium Rose Bicolore0
- Treatment
- CO 2 supplementatione0
- Outcome
- photosynthesise0
- Direction
- increasede0
- Qualifier
- –10 and –15 kPae0
- Comparator
- ambient conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the two driest irrigation regimes (–10 and –15 kPa), photosynthesis of geranium ‘Pinto Premium Rose Bicolor’ increased with CO 2 supplementation compared with the ambient condition.”
Claim · model-written summary
Fountain grass at –10 kPa had greater photosynthesis with fertilizer rates of 6 or 9 g.
- Taxon
- fountain grassCenchrus setaceuse0
- Treatment
- greater fertilizer rates of 6 or 9 ge0
- Outcome
- rate of photosynthesise0
- Direction
- greatere0
- Qualifier
- –10 kPae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similarly, for fountain grass, the moderately watered (–10 kPa) treatment had a greater rate of photosynthesis with greater fertilizer rates of 6 or 9 g.”
Claim · model-written summary
CO 2 supplementation increased water use efficiency of geranium.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CO 2 supplementation resulted in increased water use efficiency of both species, whereas rate of transpiration was lower only in fountain grass.”
t0“Geranium and Fountain Grass”
Claim · model-written summary
CO 2 supplementation increased water use efficiency of fountain grass.
- Taxon
- fountain grassCenchrus setaceust0
- Treatment
- CO 2 supplementatione0
- Outcome
- water use efficiencye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CO 2 supplementation resulted in increased water use efficiency of both species, whereas rate of transpiration was lower only in fountain grass.”
t0“Geranium and Fountain Grass”
Claim · model-written summary
CO 2 supplementation lowered transpiration only in fountain grass.
- Taxon
- fountain grassCenchrus setaceuse0
- Treatment
- CO 2 supplementatione0
- Outcome
- rate of transpiratione0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CO 2 supplementation resulted in increased water use efficiency of both species, whereas rate of transpiration was lower only in fountain grass.”
Claim · model-written summary
Fertilizer rates of 6 or 9 g gave greater dry weight, flower number and stomatal conductance in Geranium.
- Treatment
- 6- or 9-g fertilizer ratese0
- Outcome
- dry weight, number of flowers, and stomatal conductancee0
- Direction
- greatere0
- Comparator
- different fertilizer ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among different fertilizer rates, 6- or 9-g fertilizer rates had greater values for dry weight, number of flowers, and stomatal conductance in both species.”
t0“Geranium and Fountain Grass”
Claim · model-written summary
Fertilizer rates of 6 or 9 g gave greater dry weight, flower number and stomatal conductance in Fountain Grass.
- Taxon
- Fountain GrassCenchrus setaceust0
- Treatment
- 6- or 9-g fertilizer ratese0
- Outcome
- dry weight, number of flowers, and stomatal conductancee0
- Direction
- greatere0
- Comparator
- different fertilizer ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among different fertilizer rates, 6- or 9-g fertilizer rates had greater values for dry weight, number of flowers, and stomatal conductance in both species.”
t0“Geranium and Fountain Grass”
The same questions in other papers
co2 · growth · GeraniumPositive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
co2 · physiology: photosynthesis · GeraniumResults agree
1 paper in the same direction as this paper
- positive
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.