The experiment was carried out in some specific char areas at Kurigram and Gaibandha districts of Bangladesh during kharif season of 2017. The aim of the experiment was evaluating the yield performances of some BJRI kenaf varieties in comparison to local variety (Dumka-2). The BJRI tested varieties were HC-2, HC-95, BJRI kenaf-3 and BJRI kenaf-4. The experiment was laid out in a randomized complete block design with six dispersed replications. Significant yield difference was observed among the varieties for different locations. Results revealed that the average highest fibre and stick yield were recorded as 3.90 and 8.24 tons ha-1 in BJRI Kenaf 3 from Ulipur and Sundarganj sites.
Key words: Kenaf, yield, fibre, char land.
Kenaf (Hibiscus cannabinus L.), an one of the important fiber crops next to cotton and jute belonging to the family Malvaceae, is cultivated for its core and bast fibres. Recently, the interest in growing kenaf has been increased throughout the world for its elevated fiber content (Alexopoulou et al., 2000). Kenaf is traditionally grown in east-central Africa, west Asia and in several southern states of America for fiber and oil seed (20% oil content) production; whereas it comprises an excellent forage crop (Phillips et al., 1989), containing 18-30% crude leaf protein and stalk protein 5.8-12.1% (Phillips et al., 1989). Kenaf is also an important source of textile fibres for the manufacture of twines, ropes, burlap bags and carpet backings using traditional retting ponds in Africa, Asia and Latin America (Boulanger, 1990). The residual core fraction can be used as biomass for energy production (Danalatos and Archon-toulis, 2005). It is being used as a raw material alternative to wood in pulp production and the newspaper industries (Ardente et al., 2008). Kenaf accounts for about 10 percent of total raw jute production in Bangladesh (Deb and Bairagi, 2008). In Bangladesh, around 0.04 million hectares of land is now devoted to kenaf cultivation producing 0.08–0.09 million tons per annum with an average yields of 2.0-2.5 tons ha-1 (Mostofa, 2012). Kenaf can be grown in the char lands more profitability with minimum care than jute. It can give high yield even in the marginal, fallow and char lands with less care (Hiron et al., 2006). Kenaf cultivation is profitable than jute because it can be produced at minimal management practices with less labour and lower cost in char land. The prices of jute and kenaf fibres are almost same, and as a consequence, kenaf can replace jute in the char areas very easily. Farmers interest on kenef cultivation are increases day by day. Sandy medium high to low land is not suitable for jute production because of occurring severity of stem rot, die back and other similar diseases, whereas kenaf can be grown easily those type of land due to resistance to diseases and pest. A lot of char lands present in northern districts like Kurigram and Gaibandha are remain fallow during jute growing season. Farmers cannot grow jute due to infection of different diseases. They can cultivate easily kenaf as alternate of jute crop. By introducing kenaf farmers can utilize their fallow land and could be financially solvent. The program therefore has undertaken to introduce some exotic varieties of kenaf for achieving better fibre yield in char areas of Bangladesh.