ISHS Acta Horticulturae 658: I International Symposium on Rootstocks for Deciduous Fruit Tree Species
PEAR ROOTSTOCK EFFECT ON GROWTH, PRODUCTIVITY AND FRUIT INTERNAL QUALITY |
| Authors: | D. Kviklys, N. Kvikliene |
| Keywords: | Pyrus x communis, Cydonia x oblonga, yield, fruit weight, soluble solids, firmness, maturity-index |
| Abstract:
In 1997-2001, at the Lithuanian Institute of Horticulture, the effects of rootstocks Quince MA, Quince MC, Sydo, BA29, S1, Pyrus x communis seedling and K11, K16 and 1.2 from the Lithuanian quince rootstock breeding programme were studied on the pear cv. ‘Conference’. Rootstock 1.2 significantly reduced growth of a pear tree (stem diameter and total shoot length during the first two years), whereas trees on Sydo and seedling rootstocks had the strongest growth. Significant differences of stem diameter were not established between other tested rootstocks after five years in the orchard. Quince MC, Sydo, K11 and K16 were the earliest to start cropping. Trees grafted onto them started to yield in the second year after planting. The highest cumulative yield was obtained on Quince MC followed by Sydo. Other rootstocks gave statistically lower yields. Significant differences were not found among Quince MA, K16, K11 and S1. The lowest yield was on 1.2 and Pyrus x communis seedling rootstocks. The biggest ‘Conference’ fruits were from trees on rootstock K11, though fruits on rootstocks 1.2, K16 and S1 did not differ significantly. ‘Conference’ fruits on the Pyrus x communis seedling rootstock were firmer at harvest and softer on K16. Rootstocks Quince MA, K16, K11 and 1.2 produced fruits with higher soluble solids contents, whereas the lowest soluble solids contents were found in fruits from trees on S1 and Sydo rootstocks. The maturity index indicated that ‘Conference’ pears were more mature from trees on Sydo rootstocks. Quince MA and K16 induced later ripening. | |
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