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Effect of Pre-sowing Treatment on Seed Germination of Albizia Lebbeck (l.) Benth

*M S Azad
Forestry and Wood Technology Discipline, Khulna University, Khulna-9208, Bangladesh

M.W. Islam
Forestry and Wood Technology Discipline, Khulna University, Khulna-9208, Bangladesh

M.A. Matin
Forestry and Wood Technology Discipline, Khulna University, Khulna-9208, Bangladesh

M.A. Bari
Forestry and Wood Technology Discipline, Khulna University, Khulna-9208, Bangladesh

Abstract/ Executive Summary:

Albizia lebbeck (L.) Benth. known as kala koroi in Bangladesh, occupies an important place in plantation forestry for its faster growth and multiple end products. The nitrogen-fixing capacity of the tree is considered as an additional benefit in some land use systems such as, agroforestry and tea garden. Morphological characteristics of seed and seed germination of kala koroi (A. lebbeck) after pre-sowing treatments were studied in the nursery of Khulna University, Bangladesh. Seed germination started within 4 days, 2 days, 2 days, 4 days and 12 days in scarification, H2SO4, hot water, cold-water treatment and control conditions respectively in poly bags. Seed treatment with concentrated sulfuric acid (H2SO4), scarification with sandpaper, hot water (80°C), cold water and control measures showed 43%, 33%, 52%, 41% and 21% germination respectively. The highest germination success (52%) was observed under hot water treatment which was followed by concentrated H2SO4 treatment (43%), cold water treatment (41%), scarification with sandpaper (33%) and control (21%).

Keywords: Albizia lebbeck (L.) Benth., Seed Germination, Pre-sowing treatment

Location: In the nursery of Khulna University, Bangladesh

Start Date:

End Date:

Program Area: Seed Technology

Commodity: Seed germination

Objectives:

Good planning and profitability of forest nurseries depend on the appropriate techniques that speed up germination and obtain more reliable germination seeds sown (Koirala et al., 2000; Alamgir and Hossain, 2005). Thus, the objective of the present study was to determine the optimum pretreatment methods that maximize germination percentage.

Methodology:

The matured seeds of A. lebbeck were collected from the nursery of Forest Department at Fultala in Khulna district, Bangladesh. The seeds were collected from about 20 years old healthy trees. After the collection of seeds they were dried for 4 days in the sun and the seeds were separated from the pods manually and dried for another 3 days in the open air on the floor and then stored. Only the disease-free seeds were used in the experiment. The germination test was done by sowing the seeds in poly-bags. The size of poly-bags was 4 cm X 6 cm. The substrate in the poly-bags was normal to dry soil mixed with decomposed cow dung in 3:1 ratio (by volume). There were five treatments in the experiment:

Treatment 1: Control Treatment 2: Immersion in cold water (4°c) for 12 hours. Treatment 3: Immersion in hot water (80°c) for 10 minutes. Treatment 4: Scarification with sandpaper Treatment 5: Immersion in concentrated H2SO4 (80%) for 20 minutes.

In each polybag, a single seed was sown. The seeds were sown uniformly at a depth of 0.5-1.5 cm for all five treatments. Fulltime shade was provided against direct sunlight. Watering was done once daily. In the experiment, Randomized Block Design (RBD) was used. For each treatment, there were 4 replications each with 20 seeds. The total number of poly bags used was 5 x 4 x 20 = 400. That means for each treatment 80 polybags were used. Data were analyzed by variance analysis and Duncan's Multiple Range Test (DMRT). The experiment was done in April and the temperature and humidity were 33.42°c and 81% respectively in the polybags. The number of seeds germinated in each treatment was recorded daily. The starting and finishing date of germination were also recorded.

Source of Information: South Asian J. Agric., 2006, 1(2): 32-34 ISSN 1991-0037

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The highest germination success (52%) was observed under hot water treatment which was followed by concentrated H2SO4 treatment (43%), cold water treatment (41%), scarification with sandpaper (33%) and control (21%).

Knowledge Management: Journal