Abstract
In greenhouse pot experiments, Vicia faba cv. Minica was grown at ambient (315 ppm) or increased CO2 concentrations (695 ppm) with sufficient or 90 or 70% of required N, P and K. Doubling of atmospheric CO2 resulted in a >100% increase in total yield. This CO2 effect disappeared rapidly with increasing N, P or K shortage. Doubling of atmospheric CO2 resulted in no change in minimum N concentration and no change or a slight decrease in minimum P concentration in crop residues.
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Claims 4
Claim · model-written summary
Doubling atmospheric CO2 increased total yield by more than 100%.
- Taxon
- faba bean
Vicia fabat0 - Treatment
- Doubling of atmospheric CO2e0
- Outcome
- total yielde0
- Direction
- increasee0
- Value
- >100%e0
- Comparator
- ambient (315 ppm)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“faba bean”
e0“Doubling of atmospheric CO2 resulted in a >100% increase in total yield”
e1“ambient (315 ppm)”
Claim · model-written summary
Increasing N, P or K shortage rapidly eliminated the CO2 yield effect.
- Taxon
- faba beanVicia fabat0
- Treatment
- increasing N, P or K shortagee0
- Outcome
- CO2 effecte0
- Direction
- disappearede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“faba bean”
e0“This CO2 effect disappeared rapidly with increasing N, P or K shortage”
Claim · model-written summary
Doubling atmospheric CO2 did not change minimum N concentration in crop residues.
- Taxon
- faba beanVicia fabat0
- Organ / stage
- crop residuese0
- Treatment
- Doubling of atmospheric CO2e0
- Outcome
- minimum N concentratione0
- Direction
- no changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“faba bean”
e0“Doubling of atmospheric CO2 resulted in no change in minimum N concentration and no change or a slight decrease in minimum P concentration in crop residues”
Claim · model-written summary
Doubling atmospheric CO2 caused no change or a slight decrease in minimum P concentration in crop residues.
- Taxon
- faba beanVicia fabat0
- Organ / stage
- crop residuese0
- Treatment
- Doubling of atmospheric CO2e0
- Outcome
- minimum P concentratione0
- Direction
- no change or a slight decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“faba bean”
e0“Doubling of atmospheric CO2 resulted in no change in minimum N concentration and no change or a slight decrease in minimum P concentration in crop residues”
The same questions in other papers
co2 · nutrient: content · Vicia faba (faba bean)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
co2 · yield · Vicia faba (faba bean)Results agree
3 papers in the same direction as this paper
- positive
- positive
- 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.