Abstract
Sustainable water use is one of the greatest challenges of irrigated agricultural systems. This study presents the results related to the agronomic and physiological response to the deficit irrigation of almond trees ( Prunus dulcis DA Webb Mill cv. Guara) under semiarid Mediterranean conditions in the Guadalquivir river basin (SW Spain). Two deficitirrigation strategies were tested: i) regulated deficit irrigation (RDI), which was irrigated at 100% of crop evapotranspiration (ETC) throughout the irrigation period, except during the kernel-filling stage, when these trees where irrigated at 30% ETC, and ii) low-frequency deficit irrigation (LFDI), in which trees were subjected to different irrigationrestriction periods, defined in terms of stem water potential at midday (Ψ Stem ). As control, a fully irrigated treatment (C-100) was used, which received irrigation covering the 100% of ETC. The stem water potential (Ψ Stem ), the stomatal conductance (gS), the photosynthesis rate (Pn) and canopy temperature (TC) were monitored, revealing significant differences mainly in LFDI in comparison with C-100. Also, highly significant relationships were found among plant physiological parameters, showing that the water status is strongly related to the crop water availability. On other hand, in terms of nut yield, there was a notable improvement under LFDI compared with RDI, with increases of 16% in relation to C-100, and with water savings of close to 170 mm. Thus, these findings demonstrate that the LFDI is a sustainable strategy to improve almond productivity as well as water-use efficiency under limited water resources.
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Claims 6
Claim · model-written summary
Low-frequency deficit irrigation significantly changed stem water potential, stomatal conductance, photosynthesis and canopy temperature versus full irrigation.
- Taxon
- almond trees
Prunus dulcise0 - Material
- Guarae0
- Treatment
- LFDIe1
- Outcome
- stem water potential (Ψ Stem ), the stomatal conductance (gS), the photosynthesis rate (Pn) and canopy temperature (TC)e1
- Comparator
- C-100e1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“almond trees ( Prunus dulcis DA Webb Mill cv. Guara)”
e1“The stem water potential (Ψ Stem ), the stomatal conductance (gS), the photosynthesis rate (Pn) and canopy temperature (TC) were monitored, revealing significant differences mainly in LFDI in comparison with C-100”
Claim · model-written summary
Almond physiological parameters had highly significant relationships, linking water status to crop water availability.
- Taxon
- almond treesPrunus dulcise0
- Outcome
- water statuse1
- Comparator
- crop water availabilitye1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“almond trees”
e1“highly significant relationships were found among plant physiological parameters, showing that the water status is strongly related to the crop water availability”
Claim · model-written summary
Low-frequency deficit irrigation improved almond nut yield versus regulated deficit irrigation.
- Taxon
- almond treesPrunus dulcise0
- Treatment
- LFDIe1
- Outcome
- nut yielde1
- Direction
- improvemente1
- Comparator
- RDIe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“almond trees”
e1“in terms of nut yield, there was a notable improvement under LFDI compared with RDI”
Claim · model-written summary
Low-frequency deficit irrigation increased almond nut yield by 16% versus full irrigation.
- Taxon
- almond treesPrunus dulcise0
- Treatment
- LFDIe1
- Outcome
- nut yielde1
- Direction
- increasese1
- Value
- 16%e1
- Comparator
- C-100e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“almond trees”
e1“in terms of nut yield, there was a notable improvement under LFDI compared with RDI, with increases of 16% in relation to C-100”
Claim · model-written summary
Low-frequency deficit irrigation saved close to 170 mm of water.
- Taxon
- almond treesPrunus dulcise0
- Treatment
- LFDIe2
- Outcome
- water savingse1
- Direction
- savingse1
- Value
- close to 170 mme1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“almond trees”
e1“with water savings of close to 170 mm”
e2“LFDI compared with RDI”
Claim · model-written summary
Authors conclude low-frequency deficit irrigation improves almond productivity and water-use efficiency under limited water.
- Taxon
- almondPrunus dulcise0
- Outcome
- LFDI is a sustainable strategy to improve almond productivity as well as water-use efficiency under limited water resourcese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the LFDI is a sustainable strategy to improve almond productivity as well as water-use efficiency under limited water resources”
The same questions in other papers
irrigation · yield · Prunus dulcis (almond)Positive and negative results
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- no effect
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