Articles
PERFORMANCE OF SOME PEAR ROOTSTOCKS IN LLEIDA AND GIRONA (CATALONIA, NE-SPAIN)
Article number
658_22
Pages
159 – 165
Language
English
Abstract
The evaluation of 11 pear rootstocks was carried out during the 1992-2001 period grafted with the Conference cultivar at IRTAs Experimental Stations of Lleida and Mas Badia (Girona, NE-Spain). The larger part are clonal rootstocks (quince and OHxF) some of them with interstem, one seedling rootstock and self-rooted trees of Conference. Trees were planted in 1996 in Lleida and 1992 in Girona using a planting distance of 4 x 1.5m and 4 x 2m, respectively.
Bloom time was essentially the same for all rootstocks.
Harvest date was not affected by the rootstock and there were no differences in fruit firmness, fruit shape, sugar content (IR) and titratable acidity, either between all the rootstocks or when quince types were compared to the other rootstocks.
Significant differences were recorded on tree vigour even from the quince types.
The most vigorous were the OHxF333 and self-rooted trees followed by seedling and OHx69. All the OHxF selections provided greater vigour than quince types.
From quince rootstocks, BA-29 and Comice/MA had almost the same vigour and higher than M-C, the weakest one.
The use of an interstem increased tree vigour on M-A. Greatest cumulative yields per tree were obtained on all quince types and self-rooted trees and the smallest on seedling and OHxF types, especially OHxF-333. Interstem reduced yield although non significantly.
When cumulative yields were adjusted by rootstock vigour and converted to tons per ha these differences increased and the greatest was obtained on M-C. Tree vigour and cumulative yields on all the rootstocks have always been greater in Lleida than in Girona.
Yield efficiency was inversely correlated to tree vigour.
The most efficient rootstocks were M-C, Adams, Sydo and Comice/M-C, and the lowest with seedling and OHxF. Quince types always provided the largest fruit size and self-rooted, seedling and OHxF the smallest.
Self-rooted trees and seedlings showed lower sensitivity to iron chlorosis, intermediate values were recorded on BA-29 and OHxF333 and highest on M-C, M-A, Adams, Sydo and OHxF-69.
Bloom time was essentially the same for all rootstocks.
Harvest date was not affected by the rootstock and there were no differences in fruit firmness, fruit shape, sugar content (IR) and titratable acidity, either between all the rootstocks or when quince types were compared to the other rootstocks.
Significant differences were recorded on tree vigour even from the quince types.
The most vigorous were the OHxF333 and self-rooted trees followed by seedling and OHx69. All the OHxF selections provided greater vigour than quince types.
From quince rootstocks, BA-29 and Comice/MA had almost the same vigour and higher than M-C, the weakest one.
The use of an interstem increased tree vigour on M-A. Greatest cumulative yields per tree were obtained on all quince types and self-rooted trees and the smallest on seedling and OHxF types, especially OHxF-333. Interstem reduced yield although non significantly.
When cumulative yields were adjusted by rootstock vigour and converted to tons per ha these differences increased and the greatest was obtained on M-C. Tree vigour and cumulative yields on all the rootstocks have always been greater in Lleida than in Girona.
Yield efficiency was inversely correlated to tree vigour.
The most efficient rootstocks were M-C, Adams, Sydo and Comice/M-C, and the lowest with seedling and OHxF. Quince types always provided the largest fruit size and self-rooted, seedling and OHxF the smallest.
Self-rooted trees and seedlings showed lower sensitivity to iron chlorosis, intermediate values were recorded on BA-29 and OHxF333 and highest on M-C, M-A, Adams, Sydo and OHxF-69.
Authors
I. Iglesias, L. Asín, R. Montserrat, P. Vilardell, J. Carbó, J. Bonany
Keywords
pear, rootstock, quince, vigour, yield, quality, fruit size, iron chlorosis
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