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Use of Different Aquatic Plant Materials in the Ret of Jute as Weighting/ Covering Materials to Accelerate the Retting Speed and to Improve the Quality of Fibre

M. Shamsul Haque
Principal Scientific Officer
Fibre Quality Improvement Division, Bangladesh Jute Research Institute, Manik Mia Avenue, Dhaka-1207.

M. Abdul Halim
Scientific Office
Fibre Quality Improvement Division, Bangladesh Jute Research Institute, Manik Mia Avenue, Dhaka-1207.

M. Younus Ali
Scientific Officer
Fibre Quality Improvement Division, Bangladesh Jute Research Institute, Manik Mia Avenue, Dhaka-1207.

M. Asaduzzaman
Chief Scientific Officer (cc)
Fibre Quality Improvement Division, Bangladesh Jute Research Institute, Manik Mia Avenue, Dhaka-1207.

Abstract/ Executive Summary:

Quality of jute fibre mainly depends on the retting process. Weighting/ covering materials used on the ret (Jak) are most important factor in jute retting, which dominate the quality of fibre. . Past researches revealed that use of mud, earth chunk, mango logs, banana stems etc. as weighting/ covering materials on the ret of jute turns the resultant fibres ‘Shamla’ (dark-gray) due to interaction between iron content of mud and tannin content of green plants forming a complex iron-tannin. And as such huge quantity of low-grade ‘Shamla’ jute fibres are being produced every year, as a result the jute growers are being deprived of getting proper price out of these low-grade jute fibres. The experiment was undertaken to find out the effect of some aquatic plant materials on the ret of jute as weighting/ covering materials. During the year 2005, the experiment was conducted in Jute Research Regional stations such as Rangpur, Faridpur, Kishoregonj, Chabdina, Manikgonj and Sub-stations viz. Monirampur, Tarabo and Patuakhali of BJRI. In the study, water hyacinth, harkuch and pistia were used on the ret as covering/ weighting materials separately. Good quality jute fibres were obtained from the jaks covered with water hyacinth and harkuch in most of the stations.

Keywords: Ret of jute, Quality, Fibre

Location: Laboratory of Fibre Quality Improvement Division, BJRI

Start Date: 10-03-2005

End Date: 30-12-2005

Program Area: Postharvest and Agro-processing

Commodity: Jute

Objectives:

To find out the effect of using some aquatic plant materials on the ret of jute as weighting/ covering materials.

Methodology:

Jute plants of variety CVL-1 and O-9897 were grown in all Jute Research Regional stations and Sub-stations and JAES, Jagir, Manikgonj practicing by modern technology. The plants were harvested at budding stage. The retting activities were done following improved retting technology and jaks were covered with different weighting materials like water hyacinth, harkuch, pistia and other aquatic weeds. Jaks were made separately by using separate weighting materials. Finally produced fibres were assessed in respect of quality.

Source of Information: Annual report 2005-2006

Article Link (Online Journal):

Funding Source:

1. Government

Budget: Five thousand only

Total Budget (Tk.) : Five thousand only

Achievement/Findings:

In the study, water hyacinth, harkuch and pistia were used on the ret as covering/ weighting materials separately. Good quality jute fibres were obtained from the jaks covered with water hyacinth and harkuch in most of the stations. In Rangpur and Faridpur stations, the jute plants were retted with water hyacinth and harkuch at 16-17 days and 15 days respectively and produced A grade fibres. In case of Monirampur and Patuakhali stations, the jute plants were retted with water hyacinth and harkuch at 16-18 days and 18 days respectively and produced B grade fibres. In case of Manikgonj and Kishoregonj stations, the jute plants were retted with water hyacinth and harkuch at 18-20 days and 17-19 days respectively and produced C grade fibres. In Chandina and Tarabo stations, the retting time was 19-20 days and 17-19 days respectively and produced C and B grade fibre respectively. The fibre grade was C for pistia as covering material in all the stations.

Knowledge Management: Report/Proceedings, Booklet/Leaflet