THE VALUE OF SOME NATIVE PLUM VARIETIES USED AS ROOTSTOCKS
Pedoclimatic conditions, variety, rootstock and a complex of cultural practices play a decisive part in its production increase.
Fruiting, production amount and quality, as well as frost and drought hardiness depend mostly of the rootstock.
Investigations on rootstock become increasingly important in fruit-growing, since it is the judicial choice of the rootstock suited to each variety and environment that highly affects the amount and quality of planting material in the nursery and of fruit in the orchard.
The use of same rootstock in different pedoclimatic zones brings about different results, as a consequence of the ecological conditions that affect differently its potential of growth.
In the Romanian nurseries, the rootstock almost exclusively used was the Myrobalan. It was found that not all the varieties grafted on Myrobalan behaved well in nurseries and orchards.
Investigations carried out in the Soviet Union and in other countries proved that some native plum varieties, utilized as rootstocks, gave better results than did the Myrobalan.
Thus for the central zone of the Soviet Union, the Skorospelka Krasnaia, the Reine Claude Kolhoanîl, the Prun