Abstract
The spatial variability of vineyards can be characterised through precision viticulture that will allow setting the boundaries of homogeneous management zones. This study aimed to evaluate the impact of soil and plant management (site-specific management) to increase yields and improve berry quality. During three consecutive seasons, contrasting treatments designed ad hoc for two zones of vigour pre-established by NDVI were tested: high vigour zone (HV) and low vigour zone (LV). The treatments were aimed at reducing water and nitrogen supply and improving microclimatic conditions in the cluster zone in the HV zone. In the LV zone, treatments were aimed at increasing water and nitrogen supply. Leaf removal in the HV zone was the most efficient treatment to improve productivity and quality. Moreover, the water restriction improved grape quality, especially in a rainy year. The regulated deficit irrigation strategy applied in the LV zone at specific phenological stages was shown to increase vegetative growth, yield and to improve grape anthocyanins and phenols contents. The benefits of additional nitrogen supply in the LV zone on plant nitrogen status, yield, and berry composition were highly dependent on water availability. Ultimately, this study provided new insights into the relationship between water and nitrogen availability and how this determines vigour and influences yield and grape quality and influences the deviation from a “Productive Target” pattern. The use of site-specific techniques could be adjusted on a small production scale, thanks to mapping carried out with precision viticulture technologies.
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Claims 5
Claim · model-written summary
Leaf removal in the high-vigour zone was the most efficient treatment to improve Tannat productivity and quality.
- Taxon
- Vitis vinifera L.
Vitis viniferat0 - Material
- cv. Tannatt0
- Treatment
- Leaf removale1
- Outcome
- productivity and qualitye1
- Direction
- improvee1
- Setting
- HV zonee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“optimise Vitis vinifera L. (cv. Tannat) production”
e1“Leaf removal in the HV zone was the most efficient treatment to improve productivity and quality”
Claim · model-written summary
Water restriction improved Tannat grape quality, especially in a rainy year.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Material
- cv. Tannatt0
- Treatment
- water restrictione2
- Outcome
- grape qualitye2
- Direction
- improvede2
- Qualifier
- especially in a rainy yeare2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“optimise Vitis vinifera L. (cv. Tannat) production”
e2“the water restriction improved grape quality, especially in a rainy year”
Claim · model-written summary
Regulated deficit irrigation in the low-vigour zone increased Tannat vegetative growth and yield.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Material
- cv. Tannatt0
- Treatment
- regulated deficit irrigation strategye3
- Outcome
- vegetative growth, yielde3
- Direction
- increasee3
- Setting
- LV zonee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“optimise Vitis vinifera L. (cv. Tannat) production”
e3“The regulated deficit irrigation strategy applied in the LV zone at specific phenological stages was shown to increase vegetative growth, yield and to improve grape anthocyanins and phenols contents”
Claim · model-written summary
Regulated deficit irrigation in the low-vigour zone improved Tannat anthocyanins and phenols contents.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Material
- cv. Tannatt0
- Treatment
- regulated deficit irrigation strategye3
- Outcome
- anthocyanins and phenols contentse3
- Direction
- improvee3
- Setting
- LV zonee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“optimise Vitis vinifera L. (cv. Tannat) production”
e3“The regulated deficit irrigation strategy applied in the LV zone at specific phenological stages was shown to increase vegetative growth, yield and to improve grape anthocyanins and phenols contents”
Claim · model-written summary
The benefits of additional nitrogen supply in the low-vigour zone on nitrogen status, yield and berry composition depended strongly on water availability.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Treatment
- additional nitrogen supplye4
- Outcome
- plant nitrogen status, yield, and berry compositione4
- Qualifier
- highly dependent on water availabilitye4
- Setting
- LV zonee4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“optimise Vitis vinifera L. (cv. Tannat) production”
e4“The benefits of additional nitrogen supply in the LV zone on plant nitrogen status, yield, and berry composition were highly dependent on water availability”
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