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Research Detail

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Dr.Ratan Lal Banik
( Ex Divisional Officer)
Silviculture Genetics Division, Bangladesh Forest Research Institute,P.O. Box-273, Chittagong.

A study was made on the emerging culm mortality of eight different bamboo species of Bangladesh. Mortality percentage varied from species to species and even from clump to clump. Average mortality percentage varied from 28 to 69 in the case of thick-walled and large dimension bamboo species, and 9 to 37 in the case of thin-walled, small dimension species. Eco-physiological conditions and genetic make-up of each species and clump seem to influence the rate of mortality of emerging culm in bamboo.

  Emerging, Culm, Mortality, Bamboos, Clump
  Bambusetum of Bangladesh Forest Research Institute, Chittagong.
  00-00-1978
  00-00-1980
  Crop-Soil-Water Management
  Bamboo

To find out the percentage of mortality in  emerging culms based on the total culms  produced per clump in different species of bamboo and the probable causes of their  mortality.

The study was conducted at the bambusetum  of  Bangladesh Forest Research Institute Bambusetum for three years, 1978 to 1980. In all eight different bamboo species, viz., Mitinga (Bambusa tulda Roxb),Orah (Dendrocalamus longispathus Murx), Muli (Melocanna baccifera Roxb. Durz), Barua/Barak (Bambusa balcooa Roxb.), Toru (B.longispiculata Gamble ex. Brandis), Makal (B.nutans Wall ex Munro), Bariala (B.vulgaris Schard. ex. Wendl.) and budum ((Dendrocalamus giganteus Munro) were studied .The species were divided into two groups, thin-walled (<1.0 cm) and thick walled (> 1.0 cm). The number of culms under investigation was not the same for all the species due to their limited availability in the bambusetum. The clumps of each species were of 5 years of age and planted through vegetative means and not from the same clone. Number of dead and living culms out of total produced per clump of each species was recorded during the growing season of the year.The height and relative distance of dead culm from the nearest older culm was also noted. Dimension of current year’s normal (surviving) full grown culms were also measured to determine the variation in culm size of each species.

  Bano Biggyan Patrika Vol.12 (1&2) : 47-52,1983
  
Funding Source:
1.  Government Budget:  
  

Mortality of emerging culm was higher in  thick - walled than in thin-walled bamboo   species. Culm mortality appeared to be  influenced by the nature of clump formation    (open or congested) and culm dimension.  Mortality was very low in Muli where clump   was open in nature with comparatively smaller dimension culms.b) Mortality was maximum at the later part of the  growing season.It appears from the present study that the emerging culm mortality  in bamboo is really  a  problem of high magnitude and needs careful investigation  on the physiological  and ecological aspects of the problem. It also appears that the genetic make up of each clump can be an important determinant for the extent of culm mortality. Selection of better clone might also be an important approach for genetical improvement.

 

 

 

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