Authors:Hossain, M.A; Jewel, M.E.U; Sen, M; Serajuddoula, M
Abstract:Base cuttings and secondary branch cuttings of Bambusa vulgaris var. striata were collected from phenotypically superior clumps and treated with 0.2 per cent and 0.4 per cent IBA and NAA to assess the rooting ability of cuttings and steckling capacity under mist propagation system. The study revealed that both the cutting types are amenable to mass clonal propagation. Rooting ability of the cuttings was significantly enhanced by the application of IBA. The highest percentage of rooting (63.33) was observed in the base cuttings treated with 0.4 per cent IBA followed by 0.2 per cent IBA (60) and the lowest (30) was in the cuttings without treatment (control). However, the highest percentage of rooting in secondary cuttings was in samples treated with 0.2 per cent IBA, followed by 0.4 per cent IBA and the lowest was in the control. The maximum number of roots developed per cutting (11.16 and 4.88 for base cuttings and secondary cuttings respectively) was obtained from samples treated with 0.4 per cent IBA followed by 0.2 per cent IBA (9.88 and 4.0 for base cuttings and secondary cuttings respectively), and the lowest (6.00 and 2.66 for base cuttings and secondary cuttings respectively) was in the control. The average length of longest root was maximum in the cuttings treated with 0.2 per cent IBA followed by 0.4 per cent IBA and the lowest was in the control for both the cutting types. The steckling capacity did not vary between the cutting types and the concentrations of rooting hormones applied. But, the highest shoot length was obtained from the cuttings treated with 0.4 per cent NAA followed by 0.2 per cent NAA and the lowest was in the control. Considering all aspects, treating both types of branch cuttings with 0.2 to 0.4 per cent IBA is recommended for mass clonal propagation for large-scale plantation programmes.
Keywords:bamboos; clones; cuttings; hormones; IBA; NAA; pl