Abstract
Cover cropping is developing in vineyards as it may induce numerous ecosystem services. However, soil cover also competes with grapevine for soil resources. This work aimed at evaluating both the period and intensity of the resulting water and nitrogen stress experienced by grapevine by comparing treatments with bare soil, permanent and non-permanent soil cover. The adopted stress indices were the Fraction of Transpirable Soil Water (FTSW) and the Nitrogen Nutrition Index (NNI). Cover cropping improved winter soil water refilling, but the grass transpiration during spring later led to similar water stress of grapevine among treatments. In dry years, summer water stress was not higher with non-permanent cover than with bare soil. The building of a critical nitrogen content curve for grapevine enabled to diagnose an early nitrogen stress, from budbreak to flowering, in cover cropped treatments. NNI dropped then in dry years, particularly in cover cropped treatments. The early growth limitation of grapevine observed in cover cropped treatments was the consequence of mild early nitrogen stress, which suggests that perennial nitrogen reserves were reduced because of an earlier competition with cover crop. After grapevine flowering, water appeared to be the most limiting factor for both grapevine growth and nitrogen availability. In water limited environment, nitrogen stress is highly dependant on water constraints. However, this work reveals the partial uncoupling of the dynamics of water and nitrogen stress during the grapevine cycle in water-limited cropping systems, which highlights the relevance of a co-ordinated management of water and nitrogen.
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Claims 11
Claim · model-written summary
Cover cropping improved winter soil water refilling.
VitisNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cover cropping improved winter soil water refilling, but the grass transpiration during spring later led to similar water stress of grapevine among treatments.”
Claim · model-written summary
Spring grass transpiration led to similar grapevine water stress among treatments.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the grass transpiration during spring later led to similar water stress of grapevine among treatments.”
Claim · model-written summary
In dry years, summer water stress with non-permanent cover was no higher than with bare soil.
- Treatment
- non-permanent covere0
- Outcome
- summer water stresse0
- Direction
- not highere0
- Qualifier
- In dry yearse0
- Comparator
- bare soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In dry years, summer water stress was not higher with non-permanent cover than with bare soil.”
t0“grapevine”
Claim · model-written summary
A critical nitrogen content curve enabled diagnosis of early nitrogen stress from budbreak to flowering in cover cropped treatments.
- Organ / stage
- budbreak to floweringe0
- Treatment
- cover cropped treatmentse0
- Outcome
- diagnose an early nitrogen stresse0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The building of a critical nitrogen content curve for grapevine enabled to diagnose an early nitrogen stress, from budbreak to flowering, in cover cropped treatments.”
Claim · model-written summary
NNI dropped in dry years, particularly with cover cropping.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NNI dropped then in dry years, particularly in cover cropped treatments.”
t0“grapevine”
Claim · model-written summary
Cover cropping limited early grapevine growth as a consequence of mild early nitrogen stress.
- Treatment
- cover cropped treatmentse0
- Outcome
- early growth limitation of grapevinee0
- Qualifier
- mild early nitrogen stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The early growth limitation of grapevine observed in cover cropped treatments was the consequence of mild early nitrogen stress, which suggests that perennial nitrogen reserves were reduced because of an earlier competition with cover crop.”
Claim · model-written summary
Earlier competition with cover crop may have reduced perennial nitrogen reserves.
- Outcome
- perennial nitrogen reservese0
- Direction
- reducede0
- Qualifier
- earlier competition with cover crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which suggests that perennial nitrogen reserves were reduced because of an earlier competition with cover crop.”
t0“grapevine”
Claim · model-written summary
After flowering, water appeared to be the strongest limitation on grapevine growth and nitrogen availability.
- Outcome
- grapevine growth and nitrogen availabilitye0
- Qualifier
- water appeared to be the most limiting factore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After grapevine flowering, water appeared to be the most limiting factor for both grapevine growth and nitrogen availability.”
Claim · model-written summary
Nitrogen stress strongly depended on water constraints in water-limited settings.
- Outcome
- nitrogen stresse0
- Qualifier
- highly dependant on water constraintse0
- Setting
- water limited environmente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In water limited environment, nitrogen stress is highly dependant on water constraints.”
t0“grapevine”
Claim · model-written summary
Water and nitrogen stress dynamics were partially uncoupled across the grapevine cycle in water-limited cropping systems.
- Outcome
- partial uncoupling of the dynamics of water and nitrogen stresse0
- Setting
- water-limited cropping systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this work reveals the partial uncoupling of the dynamics of water and nitrogen stress during the grapevine cycle in water-limited cropping systems”
Claim · model-written summary
The authors recommend coordinated management of water and nitrogen.
- Outcome
- co-ordinated management of water and nitrogene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which highlights the relevance of a co-ordinated management of water and nitrogen.”
t0“grapevine”
The same questions in other papers
cover crop · soil: physics · VitisResults 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.