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| Titel |
What is the Optimal Water Productivity Index for Irrigated Grapevines? Case of 'Godello' and 'Albariño' cultivars |
| VerfasserIn |
María Fandiño, Emma M. Martínez, Benjamín J. Rey, Javier J. Cancela |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250111153
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| Publikation (Nr.) |
 EGU/EGU2015-11239.pdf |
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| Zusammenfassung |
| Different studies have tackled the conceptual and terminological study of crop water use
indicators, mainly water use efficiency (WUE) and water productivity (WP) (Pereira et al.,
2012; Scheierling et al., 2014). The high number of stakeholders, working about
agricultural water use (hydrology and hydrogeology, civil and irrigation engineering,
agronomy and crop physiology, economics), has hindered the real improvement
thereof, from a multidisciplinary perspective. For example, Flexas et al. (2010)
reviewed the future improvements in water use efficiency in grapevines, from a
physiological approach. In this study, two grapevine cultivars, priority in Galicia (Spain):
‘Godello’ (DO Valdeorras) and ‘Albariño’ (DO Rías Baixas, two locations), was
assessed in relation to four water productivity index, focus on irrigation systems,
agronomy and crop physiology aspects, during a wet year (2012). All WP index was
referred to farm yield level (kg ha-1); where the denominator applied to WPTWU,
include all components of soil water balance; to WPTWUfarm, introduced rainfall
and irrigation depth; to WPIrrig, only irrigation depth applied; and to WPT, crop
transpiration was used. In the last index, SIMDualKc model was used to partitioning crop
evapotranspiration and cover crop transpiration. Different ranges of values was obtained for
both cultivars, WPTWUfarm was higher in cv ‘Godello’ than in cv ‘Albariño’,
3.8 and 0.9 kg m-3 respectively. Average value to WPIrrig has showed: 17.6 kg
m-3 for cv ‘Albariño’ and 15.5 kg m-3 for cv ‘Godello’, due to a reduction of
60% of irrigation depth in DO Rías Baixas. However, for both locations, higher
WPIrrig was obtained to drip irrigation system versus subsurface drip irrigation.
WPT showed a different tendency, rain-fed ‘Godello’ and surface drip irrigation
‘Albariño’ treatments obtained higher values (6.8 and 3.6 kg m-3), with higher WPT to
cv ‘Godello’ for all treatments versus ‘Albariño’. Results had showed that water
productivity indexes are cultivar depending, similar values was achieved in near locations
(data not showed). Special care must be taken when analysing water productivity
indexes at the farm level, considering identical irrigation depth, density, canopy
management system, age of the plantation, management practices, among other factors,
which may affect of water consumed or supplied to the vineyard. Agronomical
economic aspects should be studied, taken into account irrigation systems cost and
benefit crop yield, at basin scale. Temperate viticulture should pursue greater WUE
and WP, identifying the most productive cultivars adapted to near-future climate
conditions.
References:
Flexas J, Galmés J, Gallé A, Gulías J, Pou A, Ribas-Carbo M, Tomàs M, Medrano H (2010).
Improving water use efficiency in grapevines: potential physiological targets for
biotechnological improvement. Australian Journal of Grape and Wine Research,
16(s1):106-121
Pereira LS, Cordery I, Iacovides I (2012). Improved indicators of water use performance and
productivity for sustainable water conservation and saving. Agricultural Water Management,
108:39-51
Scheierling SM, Treguer DO, Booker JF, Decker E (2014). How to assess agricultural water
productivity? looking for water in the agricultural productivity and efficiency literature.
Looking for Water in the Agricultural Productivity and Efficiency Literature (July 1, 2014).
World Bank Policy Research Working Paper, (6982) |
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