Abstract
The present work studied the effect of two consecutive years of regulated deficit irrigation (RDI) compared to rain fed management on the vegetative growth, yield, and quality of ‘Nero d’Avola’ grapes. The trial was conducted separately in two soils (vertisol and entisol) located at the top and bottom hillside of the same vineyard. Vertisol was characterized by greater depth, organic matter, exchangeable K2O, and total N than entisol. RDI was based on an irrigation volume at 25% of estimated crop evapotranspiration (ETc) up to end of veraison and 10% of estimated ETc up to 15 days before harvest. Predawn water potential (PDWP) was used as indicator of plant water status and irrigation timing. No difference in irrigation management was evident between vertisol and entisol. Under Mediterranean climate conditions, RDI was able to enhance grape yield and vegetative growth, especially in vertisol, but it reduced berry titratable acidity and total anthocyanins. ‘Nero d’Avola’ showed to adapt to drought conditions in the open field. Both soil type and irrigation regimes may provide opportunities to obtain different ‘Nero d’Avola’ wine quality and boost typicality.
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Claims 6
Claim · model-written summary
Vertisol had greater depth, organic matter, exchangeable K2O, and total N than entisol.
- Outcome
- greater depth, organic matter, exchangeable K2O, and total Ne0
- Direction
- greatere0
- Comparator
- entisole0
Not reportedTaxon
Verbatim
e0“Vertisol was characterized by greater depth, organic matter, exchangeable K2O, and total N than entisol.”
t0“‘Nero d’Avola’ Grapes”
Claim · model-written summary
Irrigation management did not differ between vertisol and entisol.
Verbatim
e0“No difference in irrigation management was evident between vertisol and entisol.”
t0“‘Nero d’Avola’ Grapes”
Claim · model-written summary
RDI enhanced grape yield, especially in vertisol.
- Taxon
- Grapest0
- Treatment
- RDIe0
- Outcome
- grape yielde0
- Direction
- enhancee0
- Qualifier
- especially in vertisole0
- Setting
- Mediterraneane0
Not reportedComparator
Verbatim
e0“Under Mediterranean climate conditions, RDI was able to enhance grape yield and vegetative growth, especially in vertisol”
t0“‘Nero d’Avola’ Grapes”
Claim · model-written summary
RDI enhanced vegetative growth, especially in vertisol.
- Taxon
- Grapest0
- Treatment
- RDIe0
- Outcome
- vegetative growthe0
- Direction
- enhancee0
- Qualifier
- especially in vertisole0
- Setting
- Mediterraneane0
Not reportedComparator
Verbatim
e0“Under Mediterranean climate conditions, RDI was able to enhance grape yield and vegetative growth, especially in vertisol”
t0“‘Nero d’Avola’ Grapes”
Claim · model-written summary
RDI reduced berry titratable acidity and total anthocyanins.
- Taxon
- Grapest0
- Treatment
- RDIe1
- Outcome
- berry titratable acidity and total anthocyaninse0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“but it reduced berry titratable acidity and total anthocyanins.”
e1“RDI was able to enhance grape yield and vegetative growth”
t0“‘Nero d’Avola’ Grapes”
Claim · model-written summary
The cultivar adapted to open-field drought conditions.
Verbatim
e0“‘Nero d’Avola’ showed to adapt to drought conditions in the open field.”
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