Abstract:
This study was carried out to determine the effects of cutting position (top, middle
and bottom), auxin concentration (control, 0.2%NAA and 0.4%IBA) and rootstock
type (‘Rosa progress’ and ‘Natal briar’) on flower yield of rose cultivar ‘Inca’. The
experiment was factorial in a completely randomized design. Stem diameter
increased acropetally in ‘Natal briar’ while in ‘Rosa progress’ basipetally. Rooting
percentage also increased basipetally in both rootstocks. Top position recorded
higher stem weight regardless of the type of rootstock used. Bottom position cuttings
treated with auxins had higher stem length than the untreated cuttings. Top position
cuttings treated with auxins exhibited higher number of harvestable stems than the
untreated cuttings. Bottom position cuttings treated with 0.4% IBA recorded higher
number of harvestable stems than 0.2% NAA treated cuttings. The total number of
harvestable stems and stem length was higher for ‘Rosa progress’ than ‘Natal briar’.
‘Natal briar’ recorded higher stem weight and rooting percentage than ‘Rosa
progress’. Bottom position cuttings of ‘Rosa progress’ treated with 0.4% IBA can be
used for grafting ‘Inca’.
