Abstract. Irrespective of cultivars, trees on Caucasian pear seedlings were characterized by
a stronger growth in comparison to trees on quince S₁. Up to the fifth year after planting, the most productive were ‘Erika’ and ‘Amfora’ cvs.

Estimation of productive value of several new pear cultivars on two rootstocks

Summary

The experiment was established at the Fruit Experimental Station – Samotwór near Wrocław in spring 2002. The trees of ‘Carola’, ‘Dicolor’, ‘Erika’, ‘Amfora’, ‘Concorde’ and ‘Radana’ pear cvs. budded on quince S₁ and Caucasian pear seedlings were planted at a spacing of 3.5 × 1.5 m (1905 trees per hectare).

‘Dicolor’ and ‘Radana’ were the most vigorous, whereas ‘Amfora’ trees grew clearly the weakest. Irrespective of cultivars, trees on Caucasian pear seedlings were characterized by stronger growth (TCSA, canopy volume, number and length of one-year shoots) in comparison to trees on dwarf rootstock quince S₁. Up to the fifth year after planting, the most productive were ‘Erika’ and ‘Amfora’ cvs. Pear trees on quince S₁ had significantly higher crop efficiency index. ‘Radana’, in spite of high vegetative growth and rather small fruit, should be interesting market supplement for the reason of early maturing time and intensive red blush. Worth noting is ‘Amfora’ cv., with weak growth, high yields and fruit more than 200 g.