Abstract
AbstractTree water use (TWU) of peach (Prunus persica L. Batsch) was studied over two years in drainage lysimeters. Trees were three years old and 3.5 m high at the outset of the experiment. Single trees were grown in individual lysimeters and sited and guarded to resemble a 4 x 1 m, high-density orchard. The effect of different irrigation strategies on TWU and growth were measured relative to a Control (non-limiting irrigation) treatment. Regulated Deficit Irrigation (RDI) is a strategy which controls vegetative vigour in high- density orchards by reducing irrigation early in the season. TWU under RDI was less than the Control over the entire season, this decline being 50% during slow fruit growth (i.e. during RDI treatment) and 30% when all treatments were irrigated to maintain drainage (post-RDI). While vegetative vigour was reduced under RDI, yield of RDI trees irrigated daily was similar to Control trees. Differences in TWU during RDI was partially explained by water availability, plant water status and stomatal conductance and post- RDI by differences in tree size, total leaf area and micro-advection. RDI trees irrigated twice daily used water more efficiently than trees irrigated weekly. RDI with saline water (25,50 and 100 mS m"1) reduced both TWU and tree performance in Year 2. The coefficients for E pan replacement (Kc), for the Control trees were 1.47 (Year 1) and 1.56 (Year 2). In both years TWU followed a similar pattern to harvest, reaching a plateau at 3-4 weeks before harvest.
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Claims 12
Claim · model-written summary
Regulated deficit irrigation reduced peach tree water use relative to the Control over the entire season.
- Taxon
- peach (Prunus persica L. Batsch)
Prunus persicae1 - Treatment
- RDIe2
- Outcome
- TWUe2
- Direction
- lesse2
- Comparator
- Controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Tree water use (TWU) of peach (Prunus persica L. Batsch) was studied over two years in drainage lysimeters”
e2“TWU under RDI was less than the Control over the entire season, this decline being 50% during slow fruit growth (i.e. during RDI treatment) and 30% when all treatments were irrigated to maintain drainage (post-RDI)”
Claim · model-written summary
Under RDI, tree water use declined by 50% during slow fruit growth relative to the Control.
- Taxon
- peach (Prunus persica L. Batsch)Prunus persicae1
- Treatment
- RDIe2
- Outcome
- TWUe2
- Direction
- declinee2
- Value
- 50%e2
- Qualifier
- during slow fruit growthe2
- Comparator
- Controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Tree water use (TWU) of peach (Prunus persica L. Batsch) was studied over two years in drainage lysimeters”
e2“TWU under RDI was less than the Control over the entire season, this decline being 50% during slow fruit growth (i.e. during RDI treatment) and 30% when all treatments were irrigated to maintain drainage (post-RDI)”
Claim · model-written summary
After RDI, when all treatments were irrigated, tree water use declined by 30%.
- Taxon
- peach (Prunus persica L. Batsch)Prunus persicae1
- Treatment
- post-RDIe2
- Outcome
- TWUe2
- Direction
- declinee2
- Value
- 30%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Tree water use (TWU) of peach (Prunus persica L. Batsch) was studied over two years in drainage lysimeters”
e2“TWU under RDI was less than the Control over the entire season, this decline being 50% during slow fruit growth (i.e. during RDI treatment) and 30% when all treatments were irrigated to maintain drainage (post-RDI)”
Claim · model-written summary
Regulated deficit irrigation reduced vegetative vigour of peach trees.
- Taxon
- peach (Prunus persica L. Batsch)Prunus persicae1
- Treatment
- RDIe3
- Outcome
- vegetative vigoure3
- Direction
- reducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Tree water use (TWU) of peach (Prunus persica L. Batsch) was studied over two years in drainage lysimeters”
e3“While vegetative vigour was reduced under RDI, yield of RDI trees irrigated daily was similar to Control trees”
Claim · model-written summary
Yield of RDI trees irrigated daily was similar to that of Control trees.
- Taxon
- peach (Prunus persica L. Batsch)Prunus persicae1
- Treatment
- RDI trees irrigated dailye3
- Outcome
- yielde3
- Direction
- similare3
- Comparator
- Control treese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Tree water use (TWU) of peach (Prunus persica L. Batsch) was studied over two years in drainage lysimeters”
e3“While vegetative vigour was reduced under RDI, yield of RDI trees irrigated daily was similar to Control trees”
Claim · model-written summary
Peach trees under RDI and irrigated twice daily used water more efficiently than trees irrigated weekly.
- Taxon
- peach (Prunus persica L. Batsch)Prunus persicae1
- Treatment
- RDI trees irrigated twice dailye4
- Outcome
- used watere4
- Direction
- more efficientlye4
- Comparator
- trees irrigated weeklye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Tree water use (TWU) of peach (Prunus persica L. Batsch) was studied over two years in drainage lysimeters”
e4“RDI trees irrigated twice daily used water more efficiently than trees irrigated weekly”
Claim · model-written summary
RDI with saline water reduced both tree water use and tree performance in Year 2.
- Taxon
- peach (Prunus persica L. Batsch)Prunus persicae1
- Treatment
- RDI with saline watere5
- Outcome
- TWU and tree performancee5
- Direction
- reducede5
- Qualifier
- Year 2e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Tree water use (TWU) of peach (Prunus persica L. Batsch) was studied over two years in drainage lysimeters”
e5“RDI with saline water (25,50 and 100 mS m"1) reduced both TWU and tree performance in Year 2”
Claim · model-written summary
The crop coefficient for E pan replacement (Kc) of Control peach trees was 1.47 in Year 1.
- Taxon
- peach (Prunus persica L. Batsch)Prunus persicae1
- Outcome
- coefficients for E pan replacement (Kc)e6
- Value
- 1.47e6
- Qualifier
- Year 1e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Tree water use (TWU) of peach (Prunus persica L. Batsch) was studied over two years in drainage lysimeters”
e6“The coefficients for E pan replacement (Kc), for the Control trees were 1.47 (Year 1) and 1.56 (Year 2)”
Claim · model-written summary
The crop coefficient for E pan replacement (Kc) of Control peach trees was 1.56 in Year 2.
- Taxon
- peach (Prunus persica L. Batsch)Prunus persicae1
- Outcome
- coefficients for E pan replacement (Kc)e6
- Value
- 1.56e6
- Qualifier
- Year 2e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Tree water use (TWU) of peach (Prunus persica L. Batsch) was studied over two years in drainage lysimeters”
e6“The coefficients for E pan replacement (Kc), for the Control trees were 1.47 (Year 1) and 1.56 (Year 2)”
Claim · model-written summary
Tree water use followed a similar seasonal pattern in both years, reaching a plateau 3-4 weeks before harvest.
- Taxon
- peach (Prunus persica L. Batsch)Prunus persicae1
- Outcome
- TWUe7
- Qualifier
- reaching a plateau at 3-4 weeks before harveste7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Tree water use (TWU) of peach (Prunus persica L. Batsch) was studied over two years in drainage lysimeters”
e7“In both years TWU followed a similar pattern to harvest, reaching a plateau at 3-4 weeks before harvest”
Claim · model-written summary
Differences in tree water use during RDI were partially explained by water availability, plant water status and stomatal conductance.
- Taxon
- peach (Prunus persica L. Batsch)Prunus persicae1
- Treatment
- RDIe0
- Outcome
- Differences in TWU during RDIe0
- Qualifier
- partially explained by water availability, plant water status and stomatal conductancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Tree water use (TWU) of peach (Prunus persica L. Batsch) was studied over two years in drainage lysimeters”
e0“Differences in TWU during RDI was partially explained by water availability, plant water status and stomatal conductance and post- RDI by differences in tree size, total leaf area and micro-advection”
Claim · model-written summary
Differences in tree water use after RDI were explained by differences in tree size, total leaf area and micro-advection.
- Taxon
- peach (Prunus persica L. Batsch)Prunus persicae1
- Outcome
- TWUe0
- Qualifier
- post- RDI by differences in tree size, total leaf area and micro-advectione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Tree water use (TWU) of peach (Prunus persica L. Batsch) was studied over two years in drainage lysimeters”
e0“Differences in TWU during RDI was partially explained by water availability, plant water status and stomatal conductance and post- RDI by differences in tree size, total leaf area and micro-advection”
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