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Assessment of Various Pre-sowing Treatments on Germination of Teak (tectona Grandis Linn. F) Seeds in Bangladesh

M.N.I. Khan*
Forestry and Wood Technology Discipline, Khulna University, Khulna 9208, Bangladesh

S.R. Biswas
Forestry and Wood Technology Discipline, Khulna University, Khulna 9208, Bangladesh

Abstract/ Executive Summary:

Delayed and non-uniform germination of seed due to hard and thick pericarp of the fruit, is the main hindrance in producing teak (Tectona grandis) seedlings. This study was intended to develop a seed treatment technique to enhance germination of teak seeds, which is efficient, cheap and uses locally available materials. A total of 16 treatments under five broad categories, viz., hot water (90-100^oC), cold water (room temperature, 20-25^o C), cow dung diluted in water (dung: water, 3:10), soil pits and fungal damaged were tested. Alternate soaking in cold water and sun drying at 24 hours interval continued up to seven days showed best germination success (61.11%). Thus, for practical use in Bangladesh these two pre-sowing treatments are recommended for germination of teak seeds.

Keywords: Tectona grandis; Germination; Sowing; Seed; Nursery technique

Location: Kaptai Hill District

Start Date:

End Date:

Program Area: Seed Technology

Commodity: Teak

Objectives:

Thus objective of this study was to suggest a pre-sowing treatment, which is technically and economically feasible and uses locally available materials.

Methodology:

During January 1999, fruits were collected from about 50 years old trees from a seed orchard at Kaptai Hill District. Fruits were cleaned by removing persistent calyx and other debris, sun dried and graded using a 8 mm sieve. Fruits passing through the sieve were rejected. Selected seeds were subjected to various pre-sowing treatments (Table 1) and germination tests were carried out during May-July, 1999.

Four treated seeds, with their stalk downward, were sown in each polybag (10// X 6//) filled with a mixture of soil and cowdung. After sowing seeds, polybags were placed in the sun, mulched with paddy straw and watered twice daily. Germination was recorded on every 5th day up to 60 days. In this experiment, each of the treatments had 36 fruits equally distributed in three replications in a completely randomized design.

Source of Information: Khulna University Studies 2(1): 135-140

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Delay and non-uniformity in seed germination, due to hard seed coat, concern all teak growers. Several pre-sowing treatments have been developed to overcome this problem. In this study, germination generally commenced within 15 days after sowing and germination was complete within 40 days. Alternate soaking in cold water and drying in the sun at 24 hours interval, up to seven days showed the best germination success (61.11%). Next promising performance was obtained by soaking seeds in cowdung solution for 24 hours and then storing in damp gunny bag for three days. Thus, for practical use in Bangladesh these two pre-sowing treatments are recommended for promising germination of teak, as these are technically and economically feasible and can be done with locally available materials.

Knowledge Management: Journal