Abstract
Five-year-old early maturing peach trees (Prunus persica (L.) Batsch cv. Flordastar grafted on GF-677 peach rootstock) were subjected to three irrigation treatments from March 18 to November 10, 2006. Control plants (T0 treatment) which received irrigation in excess of their crop water requirements (1089.7 mm) were compared with plants watered according to sap flow (SF; T1 treatment) or maximum daily trunk shrinkage (MDS; T2 treatment) measurements, so as to maintain SF and MDS signal intensities (control SF/SF in T1 and MDS in T2/control MDS, respectively) close to unity. When SF or MDS signal intensity on at least two of three consecutive days was at or below unity, irrigation was reduced by 10%. When the MDS signal intensity on at least two of three consecutive days exceeded unity, irrigation was increased by 10%. During the experiment, estimated crop evapotranspiration was 704.9 mm, and the cumulative amounts of applied water in the T1 and T2 treatments were 463.2 and 654.5 mm, respectively. The MDS-signal-intensity-driven irrigation schedule was more suitable than the SF-signal-intensity-driven irrigation schedule because it was more sensitive and reliable in detecting changes in plant water status, preventing the development of detectable plant water stress. Moreover, it had no effect on fruit size. We conclude that peach tree irrigation scheduling can be based on MDS measurements alone. Changes in the irrigation protocol assayed were proposed to reduce MDS signal intensity deviations above unity, for example, by increasing the irrigation scheduling frequency or the amount of water applied, or both. Irrigation schedules based on maintaining MDS signal intensities close to unity could be applied when local crop factor values are unavailable.
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Claims 6
Claim · model-written summary
Sap flow scheduling applied 463.2 mm of water.
- Taxon
- peach trees
Prunus persicae1 - Treatment
- T1e0
- Outcome
- cumulative amounts of applied watere0
- Value
- 463.2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the cumulative amounts of applied water in the T1 and T2 treatments were 463.2 and 654.5 mm, respectively”
e1“peach trees (Prunus persica”
Claim · model-written summary
Maximum daily trunk shrinkage scheduling applied 654.5 mm of water.
- Taxon
- peach treesPrunus persicae1
- Treatment
- T2e0
- Outcome
- cumulative amounts of applied watere0
- Value
- 654.5 mme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the cumulative amounts of applied water in the T1 and T2 treatments were 463.2 and 654.5 mm, respectively”
e1“peach trees (Prunus persica”
Claim · model-written summary
MDS scheduling was more sensitive and reliable than SF scheduling for detecting plant water status changes and prevented detectable water stress.
- Taxon
- peach treesPrunus persicae1
- Outcome
- detecting changes in plant water statuse0
- Direction
- more sensitive and reliablee0
- Comparator
- SF-signal-intensity-driven irrigation schedulee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The MDS-signal-intensity-driven irrigation schedule was more suitable than the SF-signal-intensity-driven irrigation schedule because it was more sensitive and reliable in detecting changes in plant water status, preventing the development of detectable plant water stress”
e1“peach trees (Prunus persica”
Claim · model-written summary
MDS scheduling had no effect on fruit size.
- Taxon
- peach treesPrunus persicae2
- Treatment
- MDS-signal-intensity-driven irrigation schedulee1
- Outcome
- fruit sizee0
- Direction
- no effecte0
- Comparator
- SF-signal-intensity-driven irrigation schedulee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moreover, it had no effect on fruit size”
e1“The MDS-signal-intensity-driven irrigation schedule was more suitable than the SF-signal-intensity-driven irrigation schedule”
e2“peach trees (Prunus persica”
Claim · model-written summary
The authors concluded that peach irrigation can use MDS measurements alone.
- Taxon
- peach treePrunus persicae0
- Outcome
- irrigation scheduling can be based on MDS measurements alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach tree irrigation scheduling can be based on MDS measurements alone”
Claim · model-written summary
The authors proposed increasing irrigation scheduling frequency or water amount to reduce MDS signal deviations above unity.
- Taxon
- peach treesPrunus persicae1
- Outcome
- increasing the irrigation scheduling frequency or the amount of water applied, or bothe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Changes in the irrigation protocol assayed were proposed to reduce MDS signal intensity deviations above unity, for example, by increasing the irrigation scheduling frequency or the amount of water applied, or both”
e1“peach trees (Prunus persica”
The same questions in other papers
irrigation · yield · Prunus persica (peach)Results differ
23 papers in the same direction as this paper · 31 reporting no difference from an alternative
- no effect
- negative
- positive
51 papers more in this group
See all 55 papers →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.