Abstract
Evapotranspiration (ET) and water use efficiency were evaluated for two spring wheat crops, grown in a drip-irrigated field under ambient (about 370 mmol mol1) and enriched (550 mmol mol1) carbon dioxide (CO2) concentrations during the 1992-1993, and 1993-1994, Free-Air CO2 Enrichment (FACE) experiments in central Arizona. CO2-enriched (FACE) and ambient CO2 (CONTROL) treatments were replicated in four circular plots, 25 m in diameter, and well-watered (WET) and water-stressed (DRY) irrigation treatments were imposed on one-half of each plot. Wheat ET, measured over discrete time periods of several days by a soil water balance, was significantly higher for WET than DRY irrigation treatments after the first week in March in both years. Differences in ET between CO2 treatments during the season were generally small, although there was a consistent trend towards decreased ET for the FACE over CONTROL under the well-watered irrigation regime.
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Claims 3
Claim · model-written summary
Wheat evapotranspiration was significantly higher under well-watered (WET) than water-stressed (DRY) irrigation after the first week in March in both years.
- Taxon
- Wheat
Triticum aestivume0 - Treatment
- WETe0
- Outcome
- Wheat ETe0
- Direction
- significantly highere0
- Qualifier
- after the first week in March in both yearse0
- Comparator
- DRYe0
- Setting
- central Arizonae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat ET, measured over discrete time periods of several days by a soil water balance, was significantly higher for WET than DRY irrigation treatments after the first week in March in both years”
e1“Free-Air CO2 Enrichment (FACE) experiments in central Arizona”
Claim · model-written summary
Under well-watered irrigation, elevated CO2 (FACE) showed a consistent trend towards decreased evapotranspiration compared with ambient CO2 (CONTROL).
- Taxon
- spring wheatTriticum aestivume2
- Treatment
- FACEe0
- Outcome
- ETe0
- Direction
- decreasede0
- Qualifier
- under the well-watered irrigation regimee0
- Comparator
- CONTROLe0
- Setting
- central Arizonae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences in ET between CO2 treatments during the season were generally small, although there was a consistent trend towards decreased ET for the FACE over CONTROL under the well-watered irrigation regime”
e1“Free-Air CO2 Enrichment (FACE) experiments in central Arizona”
e2“evaluated for two spring wheat crops”
Claim · model-written summary
Differences in evapotranspiration between CO2 treatments were generally small during the season.
- Taxon
- spring wheatTriticum aestivume2
- Treatment
- CO2 treatmentse0
- Outcome
- Differences in ETe0
- Direction
- generally smalle0
- Qualifier
- during the seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences in ET between CO2 treatments during the season were generally small, although there was a consistent trend towards decreased ET for the FACE over CONTROL under the well-watered irrigation regime”
e1“Free-Air CO2 Enrichment (FACE) experiments in central Arizona”
e2“evaluated for two spring wheat crops”
The same questions in other papers
co2 · physiology: water · Triticum aestivum (wheat)Results differ
3 papers in the same direction as this paper · 38 in the opposite direction
- positive
- positive
- positive
38 papers more in this group
See all 42 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.