Abstract
Partial rootzone drying (PRD) and regulated deficit irrigation (RDI) were evaluated separately over two years on Vitis vinifera L. variety `Cabernet Sauvignon' for their applicability to commercial vineyards in Texas and to investigate their potential for enhancing grapevine acclimation and cold hardiness. PRD treatments compared the alternating-half-rootzone water application strategy of PRD to an equal volume of water applied to the entire rootzone and a 2× volume of water applied to the entire rootzone. RDI treatments compared the effects of deficit irrigation at different developmental stages of grapevine: post-fruit set to veraison; veraison to harvest; post-harvest; and a no-deficit control. The PRD treatment plots performed similarly to the equal volume treatment plots for yield and fruit composition. The double-volume treatment had a trend to higher yield in 2002 and statistically significant higher yields in 2003, and slightly lower soluble solids content of fruit in 2002. Thus, the two deficit treatments, PRD and Equal, experienced only a small reduction in performance while enabling reduced water usage. The PRD alternating-half-rootzone strategy demonstrated no advantage over a standard deficit irrigation strategy. Grapevines irrigated with the RDI strategy responded to this treatment most during the post-fruit set to veraison stage of development, which had lower yields and higher fruit soluble solids compared to the no-deficit treatment in 2002. Both PRD and RDI deficit irrigation strategies significantly increased the earliness and rate of periderm development on shoots in both years, but did not result in consistently greater cold hardiness compared to no-deficit treatments.
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Claims 12
Claim · model-written summary
PRD and equal-volume irrigation gave similar yield and fruit composition.
- Treatment
- PRDe0
- Outcome
- yield and fruit compositione0
- Direction
- similarlye0
- Comparator
- equal volume treatmente0
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The PRD treatment plots performed similarly to the equal volume treatment plots for yield and fruit composition.”
t0“Grapevine”
Claim · model-written summary
Double-volume irrigation tended toward higher yield in 2002.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The double-volume treatment had a trend to higher yield in 2002 and statistically significant higher yields in 2003, and slightly lower soluble solids content of fruit in 2002.”
t0“Grapevine”
Claim · model-written summary
Double-volume irrigation significantly increased yield in 2003.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The double-volume treatment had a trend to higher yield in 2002 and statistically significant higher yields in 2003, and slightly lower soluble solids content of fruit in 2002.”
t0“Grapevine”
Claim · model-written summary
Double-volume irrigation slightly lowered fruit soluble solids in 2002.
- Treatment
- double-volume treatmente0
- Outcome
- soluble solids content of fruite0
- Direction
- lowere0
- Qualifier
- 2002e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The double-volume treatment had a trend to higher yield in 2002 and statistically significant higher yields in 2003, and slightly lower soluble solids content of fruit in 2002.”
t0“Grapevine”
Claim · model-written summary
PRD and equal-volume deficit treatments had slightly reduced performance while using less water.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Thus, the two deficit treatments, PRD and Equal, experienced only a small reduction in performance while enabling reduced water usage.”
t0“Grapevine”
Claim · model-written summary
PRD had no advantage over standard deficit irrigation.
- Treatment
- PRD alternating-half-rootzone strategye0
- Outcome
- advantagee0
- Direction
- no advantagee0
- Comparator
- standard deficit irrigation strategye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The PRD alternating-half-rootzone strategy demonstrated no advantage over a standard deficit irrigation strategy.”
t0“Grapevine”
Claim · model-written summary
RDI from post-fruit set to veraison lowered yield versus no deficit in 2002.
- Treatment
- RDI strategye0
- Outcome
- yieldse0
- Direction
- lowere0
- Qualifier
- post-fruit set to veraison stagee0
- Comparator
- no-deficit treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grapevines irrigated with the RDI strategy responded to this treatment most during the post-fruit set to veraison stage of development, which had lower yields and higher fruit soluble solids compared to the no-deficit treatment in 2002.”
Claim · model-written summary
RDI from post-fruit set to veraison raised soluble solids versus no deficit in 2002.
- Treatment
- RDI strategye0
- Outcome
- fruit soluble solidse0
- Direction
- highere0
- Qualifier
- post-fruit set to veraison stagee0
- Comparator
- no-deficit treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grapevines irrigated with the RDI strategy responded to this treatment most during the post-fruit set to veraison stage of development, which had lower yields and higher fruit soluble solids compared to the no-deficit treatment in 2002.”
Claim · model-written summary
PRD significantly advanced and accelerated shoot periderm development.
- Treatment
- PRDe0
- Outcome
- earliness and rate of periderm developmente0
- Direction
- increasede0
- Comparator
- no-deficit treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both PRD and RDI deficit irrigation strategies significantly increased the earliness and rate of periderm development on shoots in both years, but did not result in consistently greater cold hardiness compared to no-deficit treatments.”
t0“Grapevine”
Claim · model-written summary
RDI significantly advanced and accelerated shoot periderm development.
- Treatment
- RDIe0
- Outcome
- earliness and rate of periderm developmente0
- Direction
- increasede0
- Comparator
- no-deficit treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both PRD and RDI deficit irrigation strategies significantly increased the earliness and rate of periderm development on shoots in both years, but did not result in consistently greater cold hardiness compared to no-deficit treatments.”
t0“Grapevine”
Claim · model-written summary
PRD did not consistently improve cold hardiness versus no deficit.
- Treatment
- PRDe0
- Outcome
- cold hardinesse0
- Direction
- did not result in consistently greatere0
- Comparator
- no-deficit treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both PRD and RDI deficit irrigation strategies significantly increased the earliness and rate of periderm development on shoots in both years, but did not result in consistently greater cold hardiness compared to no-deficit treatments.”
t0“Grapevine”
Claim · model-written summary
RDI did not consistently improve cold hardiness versus no deficit.
- Treatment
- RDIe0
- Outcome
- cold hardinesse0
- Direction
- did not result in consistently greatere0
- Comparator
- no-deficit treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both PRD and RDI deficit irrigation strategies significantly increased the earliness and rate of periderm development on shoots in both years, but did not result in consistently greater cold hardiness compared to no-deficit treatments.”
t0“Grapevine”
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