RESULT OF THE ASSOCIATION VARIETY x ROOTSTOCK ON THE GROWTH AND DEVELOPMENT OF AERIAL AND UNDERGROUND SYSTEMS IN THE SPECIES OF APPLE AND PEAR

Abstract

The extension of some varieties of pear and apple, as well as their way of behaviour in new areas of the country, impose the verification of their biological particularities and their accentuation. It has interest also on the interaction of the two partners – rootstock/variety in the respective area, vigour, phenological aspects and resistance to diseases, pests and viruses.
To this purpose, we proposed to search several varieties of pear and apple on different rootstocks on the region of Oltcounty, in order to improve the present assortment. MM 106 rootstock presents a more superficial development of the roots, and M 4 and P.F. Cretesc presented more profound roots in soil. The affinity between partners was very good for the Jonathan variety on rootstocks M 4 and MM 106, and in the case of species of pear in the varieties Passe Crassane and Untoasa Precoce Morettini on the rootstock quince type A with intermediary Cure.