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The relationship between growth indices of young pear trees

Krystyna Ostrowska, Piotr Chełpiński

Department of Pomology
Agricultural University
Janosika 8, 71-424 Szczecin, Poland

The aim of the studies carried out in the period 1994-1996 was to determine the relationship between the growth indices of young pear trees grafted on two kinds of quince (Cydonia) rootstock (S1 and MC) and Caucas pear. Growth vigour of the trees was determined by means of the following biological parameters: trunk diameter or circumference, the number of one-year shoots, the total length of annual shoots, the number of flowers and the number of fruits. In order to assess the usefulness of cultivar-rootstock combinations an attempt was made to use Multidimensional Comparative Analysis (MCA). As a result the particular cultivar-rootstock combinations were ranked according to their growth vigour. It was found that vegetative growth can best be defined by means of the following biometric characteristics: the cross-section area of the trunk and its increase, the number of annual shoots, the total length of annual shoots, and the average length of those shoots.

Ostrowska K., Chełpiński P., 1997. The relationship between growth indices of young pear tress. Folia Horticulturae 9/2: 71-82.