The influence of apple-tree rootstock on the yield and fruit quality
2000
Lopp, J. (Estonian Agricultural Univ., Tartu (Estonia). Inst. of Horticulture)
Research material included one cultivar long-keeping apple 'Talvenauding'. This cultivar grows on 8 different rootstocks: medium size rootstocks (M3, M4, M5, 57-490), half-stunted rootstock (M7), strong-growth rootstocks (A2, E19, E15). A2 was observed as a standard. The rootstock has an influence the yield of apple-trees. In 1998 and 1999 the yield of 'Talvenauding' was higher on rootstock M3, and so was the part of extra class apples in yield. The weight of a single apple did not depend on the rootstock. Trees on rootstocks M4 and M5 were smaller, and the trunk was thinner than those of the trees on rootstock A2, but yield and the fruit weight were at the same level. Trees on the rootstock 57-490 had thicker trunk but lower yield than those on A2. The flowering was almost similar. Trees on M7 had less flowers and the fruiting percentage was lower. That resulted in lower yield. Using a suitable rootstock for 'Talvenauding' it is possible to get a higher yield and apples with better quality. That gives an important advantage on the market
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