Bamboo productivity under traditional silvicultural management practice in upper Brahmaputra valley agroclimatic zone (UBVZ), Assam, N. E. India.
Sabi Gogoi,  Debojit Neog
Field survey on homestead garden, community plantation sites and also in rural patch vegetations was conducted to find out the dominant bamboo species under cultivation in upper Brahmaputra valley agroclimatic zone, Assam, N. E. India. Bamboo population comprised of mainly Bambusa tulda, B. balcooa, B. nutans, B. pallida, Dendrocalamus hamiltonii and D. giganteus. Bambusa tulda, B. balcooa, B. nutans are the dominant species and occupies 90 % of area under bamboo cultivation. Preference of these bamboo species is largely governed by their utilization in domestic, commercial or industrial sector and current market price. Data on different yield attributing character was collected from bamboo plantations up to 5 years age. Above ground biomass was estimated and with spacing of 5 x 5 m it was found 240 tonnes/ha in B. tulda, 257 tonnes/ha in B. Balcooa with spacing of 7 x 7 where as in case of B. nutans it was 414 tonnes/ ha with 5 x 5 m spacing. Yield attributing parameters of different bamboo species was recorded. The circumference of B. tulda was 11.93 m ± 7.09, B. balcooa was 7.90 m ± 5.33 and B. nutans was 14.02 m ± 5.06. Culm length was 22.65 m ± 6.01 in B. tulda, 23.33 m ± 7.05 in B. balcooa and19.79 m ± 6.66 in B. nutans. Culm girth was recorded 23.88 cm ± 1.25 in B. tulda, 27.81 cm ± 3.71 in B. balcooa and 21.78 cm ± 1.6. in B nutans. Internode length was 43.21 cm ± 2.5 in B. tulda, 24.07 cm ± 1.48 in B. balcooa and 40.64 cm ± 2.29 in B. nutans. Number of shoot production was recorded in 9.20 ± 1.48 in B. tulda, 7.60 ± 1.14 in B. balcooa and 11.2 ± 2.48. in B. nutans.
Keywords- Bamboo, Productivity, Yield attributes, dominant, species.
Cite this Article
Sabi Gogoi,  Debojit Neog,   "Bamboo productivity under traditional silvicultural management practice in upper Brahmaputra valley agroclimatic zone (UBVZ), Assam, N. E. India."
, International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.8, Issue 3, pp.426-430, August 2020, Available at :http://www.ijedr.org/papers/IJEDR2003062.pdf