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Performance of 'Clara Frijs' pear on quince rootstocks growing in a cool, mesic Nordic climate
- Meland, M., Froynes, O., Kaiser, C.
- Acta horticulturae 2014 no.1058 pp. 627-631
- acidity, alternate bearing, climate, early development, fruit quality, grasses, herbicides, pears, planting, quinces, rootstocks, soluble solids, spatial distribution, trees, vigor, winter, Norway
- Performance of Quince root stocks âAâ, âCâ and âAdamsâ v. âPyrodwarfâ all grafted to âClara Frijsâ, were compared in vivo in western Norway. Two-year-old trees were planted at a spacing of 2.5 x 4.5 m in early fall 2001 and trained to a slender spindle with grass between tree rows and a 1 m wide herbicide strips within the rows. Tree vigour, yield, fruit size and fruit quality were evaluated annually for ten years. No severe winter damage was observed except that one Quince âCâ tree died during the third winter. Different root stocks had a significant effect on tree size after ten years of growth. Both Quince âCâ and âAdamsâ produced the smallest trees whereas âPyrodwarfâ resulted in the largest trees as measured by trunk cross-sectional area. Each year, fruit were picked between weeks no. 40-41. Tree precocity was retarded as trees began producing a small crop in the third season and yields peaked in the sixth season. Quince âAdamsâ was the most productive rootstock averaging 17.6 kg. tree-1 followed by Quince âAâ (9.0 kg). Alternate bearing was observed for all root stocks. Fruit size was intermediate, averaging 153 g for all root stocks and was little affected by different root stocks. Fruit soluble solid concentrations were generally high (12.2%) and were not significantly affected by root stocks. Fruit acidity was similar for all Quince root stocks (0.10%) and was significantly higher than fruit on âPyrodwarfâ (0.07%). In a cool, mesic northern climate we recommend Quince âAdamsâ as a rootÂ¬stock, but future investigations need to identify ways of preventing alternate bearing.