A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute
A field experiment was conducted for 4 years on patipata to find out the
relationship between planting spacing and yield potential. Three different propagules
viz. rhizome, branch cutting and rooted branch cutting were used as propagating
prologules. Production of average number of harvestable culms ranged from 506 to 560
plot’1 of 18 m2 area maintained in five different spacing on a four-year harvesting cycle
The study was undertaken to ascertain the growth performance of akashmoni
(Acacia auriculiformis) in the strip and block plantations ofBangladesh. Growth statisticslike
mean diameter at breast height (DBH), totalheight (Ht), volume over bark (Vob), basal area per
hectare per year (ba/ha/yr) and mean annual increment (MAI) were estimated using the
data collected from 6 to 10 years old plantations. The results showed that the growth
performance of the species was better in strip plantations compared to block plantations.
A financial analysis also favoured strip plantations over block plantations.
Pati-pata (Schumannianthus dichotoma) belonging to the Family Marantaceae is one of the important non – timber forest produces in
Bangladesh. It grows naturally in the swampy areas as well as is cultivated in low-lying areas. The stem of this shrub is used for the preparation
of mat, basket, bag and various novelty items (Mohiuddin and Rashid 1988). The plant can be grown using rhizome, branch cutting, rooted
cutting and seedling (Merry et al. 1997, Siddiqi et al. 1998). However, the best performance was obtained from planting rhizomes. It has been
reported that cultivation of pati-pata is more profitable than that of paddy (Mohiuddin and Rashid 1988). Thus fertilizer treatment was given
one year after planting before the monsoon to observe its effect on the profitable enhancement in yield. The treatment combinations of fertilizer doses were as follows :
Tj = NPK each at 270 gm/plot
T, = NPK each at 540 gm/plot
T, = NPK each at 710 gm/plot
T() = No fertilizer (control)
The experiment was laid out in a Randomized CompleteBlockDesign (RCBD) with four replications at Bangladesh Forest Research Institute campus, Chittagong. So, there were 16 plots each with a size of 4.5 m x 2 m. The plots were separated from one another by earthen embankment to prevent movement of water and other material among the plots. Each plot was planted with 180 rhizomes at a spacing of 1 m x 1m. The experimental areas remained inundated for four months in a year. Data were recorded on survival, emergence of shoots, heights of main shoots and their diametersfrom different clumps at every three months interval for 15 months following fertilizer treatment. Leaving the two peripheralrowsin a plot, data were collected only from the remaining interior clumps.
This paper presents information about growth, harvesting ages and yields for jalibet (Calamus tenuis), kerakbet (C. viminalis) and gollabet (Dacmonorops jenkinsiana) raised in semi-evergreen/deciduous forests of Bangladesh. Clump expansion with increasing age was highest for C. tenuis and C. viminalis in Chittagong, and for D. jenkinsiana in Sylhet. Mean annual height increments ofmain shoot of a clump of C. tenuis,
C. viminalis and D. jenkinsiana were 0.94 + 0.08,1.11+0.09 and 1.45±0.11 m respectively. Highest number of shoots per clump was noticed for C. tenuis in Sylhet followed by C. viminalis and D. jenkinsiana in Chittagong. Mean diameters of the main shoot of these species were 1.6 ± 0.1, 2.14 + 0.1 and 3.01 ± 0.13 cm respectively. Wildings were found under the clumps with varying numbers. The exploitable ages for C. tenuis, C. viminalis and D. jenkinsiana appeared to be 6-8, 9-11 and 10-12 years respectively. Further information and studies are needed to determine the harvesting cycle and suggest a management plan for rattans.
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