REGENERATION ABILITY OF THE ROOT SYSTEM

The investigation was carried out on adult fruit/bearing apricot trees grafted on Prunus domestica (BB1) and Prunus cerasifera (Myrobolan) in the ecology conditions of Herzegovina. In fruit orchard often occurred damages on the root system, so regeneration ability is then an important feature. The trial was carried out to assess regeneration ability of two rootstocks in two types of soils (sand-coated alluvium and clayey soil). For that purpose the root system is injured by simple cutting of roots to 40 cm in-depth in the fall and in the spring, exactly after and before of the rapid growth of root system. After one year it was established newly created roots using careful digging of the surrounding soil. The length of root (m) and the number of single newly created roots were defined. The results indicated that the rootstock, namely his root properties, exerts an influence on regeneration ability, particular contents of thinner fibrous roots. The effect of the type of soil was not significant. The results showed also that cutting of roots in the early spring caused better regeneration ability of the root system.