Abstract
The sensitivity of reproductive development to water deficits was investigated in Vitis vinifera L. cv. Cabernet franc by altering the supply of irrigation water in a drip-irrigated vineyard in Napa Valley, California. Midday leaf water potentials indicated that significant water deficits were imposed when water was withheld before or after veraison. When water was supplied at a rate 2x the standard production practice, fruit growth, cluster initiation, and differentiation of buds were increased. The data showed that yield increases of 30% to 40% can be obtained by increasing irrigation above the standard practice. Vine water status decreased until veraison in all treatments, but treatment differences did not occur until after fruit set. Water deficits imposed before or after veraison inhibited yield, fruit expansion, and bud development, but early deficits were more inhibitory. All water deficits depressed development of second crop. Yield component analysis indicated that the greatest amount of variation in yield was explained by variation in berries per cluster.
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Claims 8
Claim · model-written summary
Withholding irrigation before or after veraison imposed significant water deficits.
- Taxon
- Vitis vinifera L. cv. Cabernet franc
Vitis viniferae1 - Treatment
- water was withheld before or after veraisone0
- Outcome
- water deficitse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant water deficits were imposed when water was withheld before or after veraison.”
e1“Vitis vinifera L. cv. Cabernet franc”
Claim · model-written summary
Doubling irrigation increased fruit growth, cluster initiation, and bud differentiation.
- Taxon
- Vitis vinifera L. cv. Cabernet francVitis viniferae1
- Treatment
- 2x the standard production practicee0
- Outcome
- fruit growth, cluster initiation, and differentiation of budse0
- Direction
- increasede0
- Comparator
- standard production practicee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When water was supplied at a rate 2x the standard production practice, fruit growth, cluster initiation, and differentiation of buds were increased.”
e1“Vitis vinifera L. cv. Cabernet franc”
Claim · model-written summary
Increasing irrigation above standard practice raised yield by 30% to 40%.
- Taxon
- Vitis vinifera L. cv. Cabernet francVitis viniferae1
- Treatment
- increasing irrigation above the standard practicee0
- Outcome
- yielde0
- Direction
- increasese0
- Value
- 30% to 40%e0
- Comparator
- standard practicee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield increases of 30% to 40% can be obtained by increasing irrigation above the standard practice.”
e1“Vitis vinifera L. cv. Cabernet franc”
Claim · model-written summary
Vine water status decreased until veraison across treatments.
- Taxon
- Vitis vinifera L. cv. Cabernet francVitis viniferae1
- Outcome
- Vine water statuse0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vine water status decreased until veraison in all treatments”
e1“Vitis vinifera L. cv. Cabernet franc”
Claim · model-written summary
Treatment differences in vine water status emerged only after fruit set.
- Taxon
- Vitis vinifera L. cv. Cabernet francVitis viniferae1
- Outcome
- treatment differencese0
- Qualifier
- after fruit sete0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatment differences did not occur until after fruit set.”
e1“Vitis vinifera L. cv. Cabernet franc”
Claim · model-written summary
Preveraison or postveraison deficits inhibited yield, fruit expansion, and bud development, with earlier deficits more inhibitory.
- Taxon
- Vitis vinifera L. cv. Cabernet francVitis viniferae1
- Treatment
- Water deficits imposed before or after veraisone0
- Outcome
- yield, fruit expansion, and bud developmente0
- Direction
- inhibitede0
- Qualifier
- early deficits were more inhibitorye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water deficits imposed before or after veraison inhibited yield, fruit expansion, and bud development, but early deficits were more inhibitory.”
e1“Vitis vinifera L. cv. Cabernet franc”
Claim · model-written summary
All water deficits depressed second crop development.
- Taxon
- Vitis vinifera L. cv. Cabernet francVitis viniferae1
- Treatment
- water deficitse0
- Outcome
- development of second crope0
- Direction
- depressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All water deficits depressed development of second crop.”
e1“Vitis vinifera L. cv. Cabernet franc”
Claim · model-written summary
Variation in berries per cluster explained the greatest amount of yield variation.
- Taxon
- Vitis vinifera L. cv. Cabernet francVitis viniferae1
- Organ / stage
- berries per clustere0
- Outcome
- variation in yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the greatest amount of variation in yield was explained by variation in berries per cluster.”
e1“Vitis vinifera L. cv. Cabernet franc”
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See all 41 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.