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| Titel |
Relevance of the Lin's and Host hydropedological models to predict grape yield and wine quality |
| VerfasserIn |
E. A. C. Costantini, S. Pellegrini, P. Bucelli, P. Storchi, N. Vignozzi, R. Barbetti, S. Campagnolo |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 13, no. 9 ; Nr. 13, no. 9 (2009-09-16), S.1635-1648 |
| Datensatznummer |
250011994
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| Publikation (Nr.) |
 copernicus.org/hess-13-1635-2009.pdf |
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| Zusammenfassung |
The adoption of precision agriculture in viticulture could be greatly
enhanced by the diffusion of straightforward and easy to be applied
hydropedological models, able to predict the spatial variability of
available soil water. The Lin's and Host hydropedological models were
applied to standard soil series descriptions and hillslope position, to
predict the distribution of hydrological functional units in two vineyard
and their relevance for grape yield and wine quality. A three-years trial
was carried out in Chianti (Central Italy) on Sangiovese. The soils of the
vineyards differentiated in structure, porosity and related hydropedological
characteristics, as well as in salinity. Soil spatial variability was deeply
affected by earth movement carried out before vine plantation. Six plots
were selected in the different hydrological functional units of the two
vineyards, that is, at summit, backslope and footslope morphological
positions, to monitor soil hydrology, grape production and wine quality.
Plot selection was based upon a cluster analysis of local slope, topographic
wetness index (TWI), and cumulative moisture up to the root limiting layer,
appreciated by means of a detailed combined geophysical survey. Water
content, redox processes and temperature were monitored, as well as yield,
phenological phases, and chemical analysis of grapes. The isotopic ratio
δ13C was measured in the wine ethanol upon harvesting to
evaluate the degree of stress suffered by vines. The grapes in each plot
were collected for wine making in small barrels. The wines obtained were
analysed and submitted to a blind organoleptic testing.
The results demonstrated that the combined application of the two
hydropedological models can be used for the prevision of the moisture status
of soils cultivated with grape during summertime in Mediterranean climate.
As correctly foreseen by the models, the amount of mean daily transpirable
soil water (TSW) during the growing season differed considerably between the
vineyards and increased significantly along the three positions on slope in
both vineyards. The water accumulation along slope occurred in every year,
even during the very dry 2006. The installation of indicators of reduction
in soils (IRIS) tubes allowed confirmation of the occurrence of reductive
processes in the most shallow soil.
Both Sangiovese grape yield and quality of wine were influenced by the
interaction between TSW content and salinity, sometimes contrary to
expectations. Therefore, the studied hydropedological models were not
relevant to predict grape yield and wine quality in all the hydrological
functional units. The diffusion of hydropedological models in precision
viticulture could be boosted considering salinity along with topography and
soil hydrological characteristics. |
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