MACRO-PROPAGATION OF GUADUA ANGUSTIFOLIA KUNTH AN EXOTIC AND FAST GROWING BAMBOO SPECIES

摘要

This paper deals with macro-propagation of Guadua angustifolia Kunth., an exotic and fast growing multipurpose bamboo species. Studies wereconducted on effect of types of cuttings, concentrations and mode of auxin, (IBA) treatments. Leafy culm branchcuttings with shoot apex of 10-15 cm in length with 2/3 rd trimmed leaves, treated with IBA 2500 ppm (talcum based IBA powder) induced maximum (85%) rooting within 30 days in sand bed medium under intermittent misting, at 30± 5°C temperature and 70 ±5% relative humidity in Mist chamber. Whereas, nodal (culm) cuttings of 5-6 cm in length and 3-4 mm in diameter exhibited maximum (80%) rooting by pulse treatment with 2500 ppm IBA solution within 45 days period. Rooted cuttings grew vigorously in 600 ccsingle cell root trainers containing compost, sand and soil (10:7:3) with neem cake (10kg/m~3)andSSP (4.5 kg/m~3)-PlantablecIonal plants with largenumber of roots and rhizome formation was observed within 4 months period. Further multiplication (3-4 fold) can be achieved by s"paratingtillers(l-2) with roots andrhizome from the four months old rooted cuttings in root trainers. About five hundred plants were produced by these methods. Method described could be used for large-scale macro-propagation of G. angustifolia.