ISHS Acta Horticulturae 617: Workshop on Rootstocks' Performance in Phylloxera Infested Vineyards
TRIALS WITH 'SANGIOVESE' GRAFTED ON SEVERAL GRAPEVINE ROOTSTOCKS IN TWO DIFFERENT AREAS OF TUSCANY |
| Authors: | G. Scalabrelli, G. Ferroni, C. D'Onofrio, G. Di Collalto, F. Venerini |
| Keywords: | Vitis vinifera, vine performances, grapevine, quality, yield, vigour, production |
| Abstract:
Researches were conducted in the ‘Morellino di Scansano’ D.O.C. area, province of Grosseto and in the area of D.O.C.G. ‘Chianti Classico’, province of Florence. The experimental vineyards were set up in 1993 and 1994 in Chianti Classico and in the Morellino di Scansano’ area respectively with ‘Sangiovese’ grapevines grafted onto twelve rootstocks (‘101-14Mgt’, ‘1103P’, ‘110R’, ‘140Ru’, ‘161-49’, ‘3309C’ ‘41B’, ‘420A’, ‘775P’, ‘779P’, ‘K5BB’, ‘SO4’)., In addition Gravesac was planted in the first zone and eight more rootstocks ('Rupestris Du Lot', '157-11', '34 EM', 'K125AA', ‘225Ru’, '17-37', 'Fercal', '1045P)' in Chianti Classico. Both soils were non calcareous. In Chianti Classico the soil was a sandy-clay (pH 8.0) while in the 'Morellino di Scansano' area the soil was a clay loam sandy (pH 6.9). This latter area was characterised by warmer and dry conditions during summer. In the 'Morellino di Scansano' area a less vine vigour was induced by 41B’, 'Gravesac’ and ‘SO4’ while ‘779P’, ‘161-49’ and ‘140Ru’ showed to increase plant vigour. The yield was not strictly correlated to vigour. The more productive vines were grafted onto ‘775P’, followed by ‘779P’, ‘101-14’, 110R’, 140Ru’ and ‘K5BB’', while '41B' induced lower berry size and productivity and elevated sugar levels also maintaining good acidity, low pH, medium anthocyanin content of the berry. Berry sugar accumulation was the highest with ‘101-14’, 420A’ and ‘110R’, and lower with ’K5BB’. The berry anthocyanin and polyphenol richness were positively influenced by ‘SO4’and ‘779P’ and to a lesser extent by ‘’420A’, ‘’101-14, ‘110R’, ‘161-49’ and 140Ru’, while 775P’ ‘K5BB’, ‘Gravesac’, and ‘1103P’ induced lower levels. In the Chianti Classico area '41B’ and ‘420A’ determined low vine vigour, while ‘Rupestris Du Lot’ significantly decreased yield. These results showed non-negligible differences of performances among the various rootstocks according to soil and climatic conditions. The best performances were given by ‘110R’, which was the most homogeneous in both ambient. | |
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