Post on 08-Jan-2016
description
Role of climate on grape characteristics of “Moscato bianco”
in Piedmont (Italy)
RESEARCH GROUP
S. Orlandini, M. MoriondoDipartimento di Scienze Agronomiche e Gestione del Territorio Agroforestale,
Università degli Studi di Firenze
M. ManciniCentro Studi per l’Applicazione dell’Informatica in Agricoltura – Accademia dei
Georgofili, Firenze
F. Spanna, G. Cressano, S. DolzanSettore Fitosanitario della Regione Piemonte, Torino
A. Schubert, C. LovisoloDipartimento Colture Arboree dell’Università degli Studi di Torino
M. De Marziis3A s.r.l., Torino
Daniele Della Valle, Gabriella Sanlorenzo, Maurizio GilyVignaioli Piemontesi – Castagnito (CN)
Materials and methods
1. Acquisition of cartographic base at 1:25.000 scale of Moscato d’Asti area
2. Acquisition of all information layers, not already available, necessary for analysis and data processing (boundaries, rivers, main localities)
3. Land digital model to produce information layers concerning topographical and geographical characteristics of the territory Elevatio
n
Slope
Exposure
Historical climatic investigationHistorical climatic investigation
23 stations
Data from the net of Hydrographic National Service - Hydrographic Office of Po river
Daily recording of:
Total precipitations
Minimum, maximum, daily average temperature
Bioclimatic indexesBioclimatic indexes
24 stations from 1999 to 2001
Active temperatures summation (STA)Thermal excursions summation (SET)Huglin indexNumber of rainy daysEffective rain summationSpring frost riskBeginning of vegetation seasonLenght of vegetative period
Phenological and grape quality Phenological and grape quality parametersparameters
30 vineyards
differents for
exposure, elevation,
slope,
distance from the valley bottom
Phenological indexesPhenological indexes
Date of budbreak Phase 07 of BBCH
Phase C of Baggiolini
Date of bloom 50% full bloom
Date of veraison must with 10° Babo
Grape quality indexesGrape quality indexes
Potential alcohol Total acidity pH
Samplings made on August 22th, August 29th, September 5th of every
year (1999-2001)
Creation of thematic maps1. Finding maps on the scale of 1:25.000 of
Moscato d’Asti area2. Digitalization and acquisition of all the
informative layers (level curves, borders, rivers, towns)
3. Creation of the digital model of the ground, by which the informative layers concerning the topographic and geographic characteristics of the territory have been produced (elevation, slope, exposure)
Territorial analysisTerritorial analysis
GENERATION OF THE DIGITAL MODEL OF THE GROUND
• the digital model of the ground which comes from the elaboration can be georeferred according to the UTM system
• the elaborated image is returned in raster
form
Pixel of 75 x 75 m
Grid units of 5625 m2
450.776 pixels
cells of dimensions lower than 75*75 m would not increase the detail but the mistake of the information itself
THE SPATIALIZATION OF THE BIOCLIMATIC AND THE QUALITY/PHENOLOGY DATA
the values of the bioclimatic indexes and phenological/qualitative are only representative of a limited area.
the extent of the data to the whole surface can be made with a spatial interpolation proceeding
MULTIREGRESSIVE METHOD
the regressions have been selected on the basis of the correlation (R2) and significance coefficient
Bioclimatic Indexes the regressions have been used with geomorphological parameters like latitude, longitude, elevation, exposure, slope
Phenologic/Qualitative Indexes geomorphological parameters and bioclimatic indexes
MULTIREGRESSIVE METHOD
R2, F, and variables used for bioclimatic indexes
R2, F, and variables used for phenology parameters
R2, F, and variables used for quality parameters
Elevation map in
Moscato d’Asti production area
Exposure in Moscato d’Asti production area
Slope in Moscato d’Asti production area
Sum of the active temperatures
1997-2001
Huglin Index map
1997-2001
Sum of daily thermal excursions
1997-2001
Total annual precipitations 1992- 2000
Number of rainy days
1997-2001
Sum of effective rain
April - September 1997-2001
Beginning of vegetative season index
1997 - 2001
Spring frost risk map
1997 – 2001
Lenght of the vegetative season
1997 - 2001
Budbreak map
Ultima settimana marzoPrima settimana aprileSeconda settimana aprileTerza settimana aprile
Bloom date
Ultima settimana maggioPrima settimana giugno
Terza settimana giugno
Seconda settimana giugno
Veraison map
Ultima settimana di luglioPrima settimana di agostoSeconda settimana agosto
Terza settimana agosto
Total acidity at August 22th
Total acidity at August 29th
Total acidity at September 5th
Potential alcohol at August 22th
Potential alcohol at August 29th
Potential alcohol at September 5th
pH at August 22th
pH at August 29th
pH at September 5th
The cartography display (scale 1:25.000) of different parameters allows to zone the Moscato d’Asti production area in 3 sub-zones
exposure, elevation, climate, bioclimatic indexes, phenological phases, must parameters (alcohol, acidity, pH)
early zone
late zone
intermediate zone
with more or less earliness
Ripeness
LATE RIPENESSLATE RIPENESS
EARLY RIPENESSEARLY RIPENESS
ZONES WITHZONES WITH INTERMEDIATE RIPENESSINTERMEDIATE RIPENESS
Coazzolo, Castagnole, Mombaruzzo
Acqui, Neive, Strevi
S.Stefano Belbo, Serralunga
CONCLUSIONS
1. The thematic maps obtained could be used to plan agronomic and vine growing strategies.
Knowledge of expected phenological dates and of potential qualitative indexes can allow to plan vintage time.
CONCLUSIONS
2. The budbreak, bloom, veraison phases have taken place in a range of 10 to 20 days or more in different zones.
CONCLUSIONS
3. In the same zones where we have seen lower values of bioclimatic indexes, phenological phases were posticipated and potential alcohol decreased.
At the same time, acidity increased and pH decreased, showing a clear ripening delay.
Grapes located in the northern zone of the production area
with higher thermal summations, lower elevation, lower slope
ripen earlier than vines of the southern zone
with lower thermal summation, higher elevation, higher slope
CONCLUSIONS