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Effect of Drying Method on Quality of Soybean Seed

M. R. Ali
Regional Agricultural Research Station, BARI, Jamalpur.

M. M. Rahman
Professor
Department of Agronomy, BAU, Mymensingh.

M. S. Rahman
Upazila Agriculture Officer
DAE, Gopalpur, Tangail.

M. M. Hossain
Regional Agricultural Research Station, BARI, Jamalpur.

M. Asaduzzaman
Regional Agricultural Research Station, BARI, Jamalpur.

Abstract/ Executive Summary:

The experiment was conducted at the Seed Laboratory, Regional Agricultural Research Station, BARI, Jamalpur in 2010 with a view to study the effect of drying method on soybean seed germination and seedling vigor. Eight drying condition viz., i) Cemented floor ii) Tripale upon cemented floor iii) Bamboo chatai upon cemented floor, iv) Cloth upon cemented floor, v) Earthen floor, vi) Tripale upon earthen floor, vii) Bamboo chatai upon earthen floor and viii) Cloth upon earthen floor were included in the experimental treatment variables with three replications using a completely randomized design. Seed moisture content (%), germination (%), germination index, and seedling dry weight (g) were recorded at 50, 100, 150 and 200 days after storage (DAS). The highest germination percentage, germination index and seedling dry matter was obtained from tripale over cemented floor followed by bamboo chatai over cemented floor, tripale over earthen floor and bamboo chatai over earthen floor. The lowest germination percentage, germination index and seedling dry matter was obtained from cemented floor.

Keywords: Soybean, Seed moisture, Drying condition, Viability, Germination index

Location: Seed Laboratory of Regional Agricultural Research Station, Jamalpur and Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur

Start Date: 00-05-2010

End Date: 00-12-2010

Program Area: Seed Technology

Commodity: Soybean

Objectives:

To find out the effect of different sun drying methods on soybean seed quality.

Methodology:

An experiment was conducted at Seed Laboratory of Regional Agricultural Research Station, Jamalpur during the period from May to December 2010 with a view to study the effect of different sun drying methods on soybean seed quality. Soybean var. Shohag (PB1) collected from Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur was sown at Regional Agricultural Research Station Farm, Jamalpur with proper agronomic management. The crop was harvested at full maturity. After proper processing and cleaning the seed was dried in the sun to about 8% seed moisture content (SMC) following the condition specified viz., i) Cemented floor ii) Tripale upon cemented floor iii) Bamboo chatai upon cemented floor, iv) Cloth upon cemented floor, v) Earthen floor, vi) Tripale upon earthen floor, vii) Bamboo chatai upon earthen floor and viii) Cloth upon earthen floor. The experiment was arranged in a Completely Randomized Design with three replicates. The seed was tested for different quality parameters at 50, 100, 150 and 200 days after storage (DAS). The seeds were kept in the polythene bag (0.05mm thickness) under ambient room condition (23-32 °C). The quality parameters tested were seed moisture content, germination percentage, germination index, and seedling dry matter. Moisture content of seed was measured using high constant temperature oven dry method following ISTA rules (ISTA, 2003). About 5-8g of soybean seeds were placed in an aluminum dish and dried in oven at 130°C for 2 hours (until constant weight achieved). After that the samples were cooled in a desecrator and weighed. Germination test of seed was done in the sand- petridis method using sterilized sand. Randomly collected 50 seeds in three replicates per bag were used in the test. The sand was moistened to 60% water holding capacity before placing it on the petridish. Seed germination was counted at 8 days after placing the seed. The number of normal seedlings, abnormal seedlings and dead seeds were recorded and germination percentage was counted as per ISTA rules (ISTA, 2003). Germination index of seed was estimated from counting of the number of germinating seed each day up to 8 days of setting the test using the formula given by Association of Official Seed Analysts. The normal seedlings from each germination lot were collected, washed with running tap water and surface dried. The seedlings were then dried in the oven at 70°C for 72 hours (until constant weight reached) and the weight expressed seedling^-1 basis. At the end of the storage period (200 DAS), randomly selected 100 seeds from each seed lot in three replications were sown in the well prepared field. The number of seedlings emerged each day were counted up to 15 days after sowing. Data analysis was done statistically and the means were compared by Duncan’s Multiple Range Test.

Source of Information: Bangladesh Agron. J. 2015, 18(1): 53-57

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Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The study concludes that soybean seeds could be sun dried on tripale upon a cemented floor to 8% SMC (Seed moisture content) for storing to maintain high seed quality.

Knowledge Management: Journal