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Study on Different Type of Jak for the Production of Quality Fibre in a Canal or Small Ditches

Md. Mozibur Rahman
Chief Scientific Officer
Head of Fibre Quality Improvement Division, BJRI, Dhaka-1207.

M. Muktadir Hossain
Scientific Officer (cc)
Post Harvest Processing Department, Fibre Quality Improvement Division, BJRI, Dhaka-1207.

Dr. Firoza Akhter
Principal Scientific Officer
Post Harvest Processing Department, Fibre Quality Improvement Division, BJRI, Dhaka-1207.

Md. Younus Ali
Senior Scientific Officer (cc)
Post Harvest Processing Department, Fibre Quality Improvement Division, BJRI, Dhaka-1207.

Abstract/ Executive Summary:

Fibres are obtained from the jute plants following a complex retting process where water and microorganisms take part in a specially made stack of jute plants called jak. The experiment was undertaken to find out an appropriate type of jak which can produce quality jute fibres in a small area of water in seven different stations of BJRI, ie, Rangpur, Faridpur, Kishoregonj, Chandina, Nashipur and JAES, Jagir, Manikgonj. In the period from 2011 to 2013 two different types of jute varieties i.e., Bjri tossa pat-4 (O-72) and CVL-1 were use to assess the retting performance of four different methods of jaks under this study. The round jak preparation was very easy in respect to other three of jak. The preparation and management of 2 & 4 layered and farmer practices jaks are not easy in small ditches or canals of water. In case of management round jak was very easy to manage. It was easily moved through the water channel, it was easily turned upside down for better retting. But the management of all other jaks was slightly difficult. The round jak method needed very narrow and short-area of water resources. So, this method is suitable for narrow canals or small ditches of water where other three types of jak are not possible to apply properly. Fibres are obtained from the jute plants following a complex retting process where water and microorganisms take part in a specially made stack of jute plants called jak. The experiment was undertaken to find out an appropriate type of jak which can produce quality jute fibres in a small area of water in seven different stations of BJRI, ie, Rangpur, Faridpur, Kishoregonj, Chandina, Nashipur and JAES, Jagir, Manikgonj. During the year 2010, O-9897 and CVL-1 jute varieties were used to identify the performance of jaks. Each method of jaks was studied based on the quality of produced jute fibre. The round jak preparation was very easy in respect to other three of jak. The preparation and management of 2 & 4 layered and farmer practices jaks are not easy in small ditches or canals of water. In case of management round jak was very easy to manage. It was easily moved through the water channel, it was easily turned upside down for better retting. But the management of all other jaks was slightly difficult. The round jak method needed very narrow and short-area of water resources. So, this method is suitable for narrow canals or small ditches of water where other three types of jak are not possible to apply properly.

Keywords: Jute, Jak, Production of quality fibre, Canal or small ditches

Location: Jute Research Regional Stations at Rangpur, Faridpur, Kishoregonj, Chandina, Nashipur, Sub-station Monirampur and JAES, Jagir, Manikgonj.

Start Date: 10-03-2010

End Date: 30-12-2012

Program Area: Pest Management

Commodity: Jute

Objectives:

To find out which type of jak is more efficient in insufficient retting water in a small area for quality fibre production.

Methodology:

The experiment was conducted at Jute Research Regional Stations Rangpur, Faridpur, Kishoregonj, Chandina, Nashipur, Sub-station Monirampur and JAES, Jagir, Manikgonj during the period from 2011 to 2013. Two different jute varieties viz. Bjri tossa pat-4 and CVL-1 were used to identify the performance of different jak methods like (1) Round jak (2) Flat jak with 2 layers (3) Flat jak with 4 layers and (4) farmers practices. At the proper cutting age the jute plants were harvested and the jaks were prepared by 10-15 bundles of jute plants for each method. The jaks were the kept in submerged condition in water where retting microbes were taken part in retting of jute. After completion of retting the fibres were extracted, washed and dried. Then the performance of the jaks was assessed based on the following criteria. i) Preparation of jak ii) Management of the jak in small ditches or canals iii) Area of water resource occupied by the jak iv) Cuttings percentage and v) Colour of produced jute fibre In the year 2010 only CVL-1 were used as variety to assess the performance of different jak methods like (1) Round jak (2) Flat jak with 2 layers (3) Flat jak with 4 layers and (4) farmers practices. At the proper cutting age the jute plants were harvested and the jaks were prepared by 10-15 bundles of jute plants for each method. The jaks were the kept in submerged condition in water where retting microbes were taken part in retting of jute. After completion of retting the fibres were extracted, washed and dried. Then the performance of the jaks was assessed based on the following criteria. i) Preparation of jak ii) Management of the jak in small ditches or canals iii) Area of water resource occupied by the jak iv) Cuttings percentage and v) Colour of produced jute fibre

Source of Information: Annual report 2010-2011, 2011-2012, 2012-2013.

Article Link (Online Journal):

Funding Source:

1. Government

Budget: Ten thousand only

Total Budget (Tk.) : Ten thousand only

Achievement/Findings:

In the period of 2012-2013, In case of BJRI tossa pat-4 (O-72) for four stations, the results showed that the highest fibre yield was found 3032 kgha-1 at Chandina and the lowest was 2428 kgha-1 at Manikgonj. Cutting percentage of Bjri tossa pat-4 ranged from 8.26-13.01%, 7.85-12.36%, 9.28-13.13% and 10.13-14.11% at Chandina, Kishoregonj, Nashipur and Manikgonj stations respectively. In case of CVL-1, the highest and lowest fibre yield was found 3550 kgha-1 at Manikgonj and 2456 kgha-1 at Nashipur respectively. On the other hand cutting percentage ranged from 10.21 to 14.83%, 10.21 to 13.07%, 11.21 to 16.11%, and 10.09 to 13.41% at Chandina, Kishoregonj, Nashipur and Manikgonj respectively. Fibre colour and grade were found more or less similar among the different locations. In the period of 2011-2012, In case of BJRI tossa pat-4 (O-72) for four stations, the results showed that the highest fibre yield was found 2357 kgha-1 at Manikgonj and the lowest was 2003 kgha-1 at Kishoregonj. Cutting percentage of Bjri tossa pat-4 ranged from 9.37 to 14%, 10.37 to 14.15%, 10.13 to 14.17% and 11.12 to 15.15% at Monirampur, Kishoregonj, Dinajpur and Manikgonj stations respectively. In case of CVL-1, the highest and lowest fibre yield was found 2233 kgha-1 at Monirampur and 2000 kgha-1 at Dinajpur. On the other hand in CVL-1 the cutting percentage ranged from 11.03-15.94%, 12.14-17.10%, 10.13-15.70% and 11.19-14.52% at Monirampur, Kishoregonj, Dinajpur and Manikgonj respectively. Fibre colour and grade were found more or less similar among the different locations. In the period of 2010-2011, In case of O-9897 for three stations, the highest fibre yield was found 2184 kgha-1 at Manikgonj and the lowest was 1998 kgha-1 at Faridpur. In case of CVL-1, the highest and lowest fibre yield was found 2244 kgha-1 and 2079 kgha-1 at Rangpur. In case of O-9897 the cutting percentage ranged from 10-13%, 5-7% and 4-6% at Manikgonj, Rangpur and Faridpur respectively. On the other hand in CVL-1 the cutting percentage ranged from 16-21%, 9-11% and 6-8% at Manikgonj, Rangpur and Faridpur respectively. Fibre colour and grade were found more or less similar among the different locations.

Knowledge Management: Report/Proceedings, Booklet/Leaflet