ASPECTS REGARDING GRAFT/ROOTSTOCK BIOSYSTEM OF APRICOT CULTIVARS NJA 42 AND CEA MAI BUNA DE UNGARIA ON REDDISH PRELUVOSOIL FROM THE CENTRAL ZONE OF OLTENIA

This paper presents the installation depth of horizontal roots of the apricot species, as part of a plantation established in 1999, at the Didactic Station Banu Maracine. The research was carried out on the apricot cultivar ’NJA 42’, ’Cea mai buna de Ungaria’ grafted on the ’Miroval’ rootstock, using the profile method in the spring of 2012. It was ascertained that the maximum installation depth of horizontal roots with the diameter between 3-5 mm was up to 40 cm, those with the diameter of over 5 mm being found to the depth of 60 cm, and those with the depth of up to 3 mm were found on the entire depth of the soil profile (0-100 cm). The largest share of roots (over 2/3) was found on the depth of 0-30 cm, thus it is recommended that the depth of incorporation of mineral and organic fertilizers be superficial, respectively the working depth in the orchard be up to 20 cm.