BANGLADESH JOURNAL OF FOREST SCIENCE
A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute
A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute
This paper presents information on propagation and culm production of Bambusa
vulgaris and B. polymorpha by node cutting method. Five clumps each of B. vulgaris and B.
polymorpha were selected for the study. One culm from each clump of both the species were
collected and segmented into one-node cutting of 30 pieces in three sections (upper, middle and
lower) with sharp saw. Then propagules were developed from node cuttings in the soil bed
nursery during the rainy season (June-July). Node cutting of only middle portion of the culm
produced roots and rhizomes. Sixty six percent node cutting of B. vulgaris and sixty percent of B.
polymorpha of the middle portion produced roots. After having rooted and rhizomed successfully,
10 healthy propagules were planted at a spacing of 3.5 m x 3.5 m in the field for their growth
performance. Node cuttings of B. vulgaris produced 4.28 culms and those of B. polymorpha
produced 2.12 culms per clump per year. There is significant difference of culm production at 5%
level (t = 3.5678). After five years of the planting, the bamboo attained merchantable size and was
harvested from the clumps of both the species. This method with no temperature and moisture
control facilities and propagation structure was found suitable for the farmer.
The growth periodicity of clum and rhizome in Melocanna baccifera clumps were studied. The culm emergence is maximum in July to mid September. It was observed that everyday only the middle internode of a developing culm elongated maximum and moved gradually in successive order from the base to the tip of the culm. The lower internodes rarely elongated. The movement and elongation ofrhizome neck in the clump seemed to take place either slowly or actively throughout the year irrespective of seasonal variation. The culm emergence and rhizome neck development took place simultaneously. The growth periodicity of underground rhizome system and culm on the ground was found to be interrelated and seemed to be alternating with each other. Periodicity for culm emergence and rhizome neck development in M. baccifera was influenced by both soil and air temperature and ambient moisture condition.
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