Published in Scientific Papers. Series B, Horticulture, Volume LXI
Written by Adrian ASĂNICĂ, Valerica TUDOR, Dorin SUMEDREA, Răzvan Ionuț TEODORESCU, Adrian PETICILĂ, Alexandru IACOB
The planting material production is a particularly attractive segment of fruit growing field, both through the possibility of maximizing profits on small lands and because of the increased interest manifested by growers in the horticultural sector, especially in berries. The currant is specie that manages to propagate more easily than other berry shrubs, but rooting capacity vary from species to species and depending on different climatic and technological factors. The present paper supports the nursery activity by developing a complex experimental module that identifies the best solutions for black and red currant cuttings as a way of vegetative propagation. The thickness of the cuttings, rooting substrates and rooting hormonal stimulants (obtained in laboratory and commercial products) are taken into account. Two varieties of currants were used: 'Tinker’ cultivar for black currant and 'Elite’ cultivar for red currant. The rooting percentage of cuttings was very similar for the black and currant varieties (around 77%). For both currants, the thinner cuttings gave the best results in terms of rooted cuttings percentage. Perlite + sand substrate achieved the highest rooting percentage of the cuttings but with the lowest vegetative growths. Among the stimulators used for rooting, the IBA hormone (regardless of the concentration used) achieved the best percentages of cuttings rooted in both currant varieties. IBA 1000 ppm gave the best results on the length of the shoots on both currant varieties. Peat + sand positively influenced the root volume in the red currant and perlite + peat mixture for black currant. The volume of the root system in the red currant was approximately 2 times larger than the black currant. IBA 1000 and IBA 1500 conducted to the most extensive radicular system to both currant varieties.
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