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Effect of Drying Period of Harvested Plant and Method of Threshing on Yield and Quality of Kenaf Seed

A.F. Mollah
Jute Research Regional Station, Bangladesh Jute ResearrchInstitute (BJRI), Rangpur

M.A. Khan
Farm Management Unit, BJRI, Dhaka

M.Z. Tareq
BARJ-Project, JAES, BJRI, Manikganj

A.B.M.Z. Hoque
Genetic Resource & Seed Division, BJRI, Dhaka

M.R. Debnath
Jute Research Regional Station, BJRI, Faridpur, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at the Bangladesh Jute Research Institute (BJRI), Regional Station, Rangpur, Bangladesh during July to December, 2014 and 2015 to study the effect of drying period of harvested plant and method of threshing on yield and quality of kenaf seed. The trial used three drying period of harvested plant (viz., threshing without drying of harvested plant, threshing after 7 days drying of harvested plant, threshing after 14 days drying of harvested plant) and two method of threshing (viz., Traditional method of threshing, mechanical method of threshing) in a Randomized Complete Block Design (RCBD) with four replications. The highest kenaf seed yield was obtained at 7days drying period and from mechanical method (788.03kgha^-1) with minimum requirement of time. Seed quality was found better at no drying of harvested plants in both the threshing methods.

Keywords: Drying period, Threshing method, Yield, Quality, Kenaf seed

Location: Bangladesh Jute Research Institute (BJRI), Regional Station, Rangpur, Bangladesh

Start Date: 00-07-2014

End Date: 00-12-2015

Program Area: Postharvest and Agro-processing

Commodity: kenaf

Objectives:

The experiment was designed to develop economically feasibility kenaf seed threshing technique for getting more seed yield and quality

Methodology:

An experiment was conducted at the Bangladesh Jute Research Institute (BJRI), Regional Station, Rangpur, Bangladesh during July to December 2014 and 2015 to the see the effect of drying period of harvested plant and method of threshing on yield and quality of kenaf seed. The experiment comprised three drying period of harvested plant (viz., threshing without drying of harvested plant, threshing after 7 days drying of harvested plant and threshing after 14 days drying of harvested plant) and two method of threshing (viz., Traditional method of threshing and mechanical method of threshing) in a Randomized Complete Block Design (RCBD) with four replications. The unit plot size was 8 m × 5 m. Kenaf variety HC-95 was used as test crop. The experimental plots were fertilized with urea, triple super phosphate (TSP), murate of potash (MoP) and gypsum @ 180-50-20-50 kg ha-1,respectively. All fertilizers except urea were applied during final land preparation. Urea was top dressed in three equal splits at 15, 30 and 45 days after sowing (DAS). The seed was sown @ 12 kg ha-1on 25 August in 2015 in line sowing. Weeding was done by hand at 30 days after sowing (DAS). Thinning was done to maintain plant to plant distances of about 15 cm along with the weeding operation. The crop was infested by mealy bug and white fly at the vegetative stage which were successfully controlled by spraying Ripcord 10 EC @ 2mlL^-1 of water for two times at an interval of 10 days. Insecticide was applied at 30 days after sowing. No irrigation was needed while drainage of excess water was done as and when necessary. Crop was hand harvested at maturity (i.e. when 80% of the capsules become brown in color). Drying period of harvested plant and threshing was done as per experimental specification. Paddy thresher machine was use as mechanical threshing. Initial seed moisture content was measure at threshing time.Then seeds were sun dried on jute mat kept on cemented floor for 5-6 days to around 8% moisture content. After cleaning the seed was stored in thick polythene bags and kept in the laboratory until further use for quality tests. Standard laboratory germination accelerated ageing test and field emergence percentages were done to record on germination and vigour of seed. A brief description on different laboratory tests is given below.Laboratory germination test:Test was conducted on top of the paper method. The germination percentage of seed was measured using the following formula: Germination (%) = (Number of normal seedling/Number of seed sown) x 100

Accelerated ageing (AA) test: 15 g seed in accelerated ageing chamber exposing to 41⁰C temperature and 100% RH for 72 hours. Following the laboratory germination test (ISTA, 1999). Statistical analysis of data: The collected data on different yield related characters and seed quality parameters were subjected statistical analysis following ANOVA technique. Differences among treatment means were adjusted by Duncan’s Multiple Range Test with the help of a computer based statistical package program MSTAT-C (Gomez and Gomez, 1984).

Source of Information: J. Biosci. Agric. Res. 11(02): 963-967

Article Link (Online Journal): DOI: 10.18801/jbar.110216.118

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Highest kenaf seed was obtained from mechanical method of threshing in all the drying period and minimum requirement of time. The best quality seed was also obtained at threshing without drying of harvested plant in both the threshing methods.

Knowledge Management: Journal