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Effect of Nailing Density for Agar Formation in Agar Trees (aquilaria Malacensis Lamk.)

W. Parvin
Bangladesh Forest Research Institute,P.O. Box 273, Chittagong-4000, Bangladesh.

M. W. Baksha
Bangladesh Forest Research Institute, P.O. Box 273, Chittagong-4000, Bangladesh

M. Z. Rahman
Bangladesh Forest Research Institute, P.O. Box 273, Chittagong-4000, Bangladesh

M. R. Islam
Bangladesh Forest Research Institute, P.O. Box 273, Chittagong-4000, Bangladesh

S. Nasreen
Bangladesh Forest Research Institute, P.O. Box 273, Chittagong-4000, Bangladesh

Abstract/ Executive Summary:

The effect of nailing density in agar formation through artificial wounding was observed in agar trees. Five different nailing densities like; 1 cm x 1 cm, 2 cm x 2 cm, 3 cm x 3 cm, 4 cm x 4 cm and 5 cm x 5 cm were used as treatment in 25 selected agar trees in three location with the five experimental sites, Boroduara (Chittagong),Fashiahkhali (Cox’s Bazar), Bagaihat (Rangamati), Bagmara and Lathitila (Moulvibazar). The age of the treated agar trees were 8,10 and 15 years respectively. The experiment was conducted in June 2008 and agar wood core samples were collected after two years of the nailing treatments. Among the different densities, 4 cm x 4 cm nailing distance was found to be the best nailing density for maximum agar formation. On an average 95% oleoresin deposit was found in 15 years old agar tree.

Keywords: Agar formation, Agar trees, Artificial wounding, Nailing density, Tree age.

Location: Boroduara in Chittagong and Fashiakhali in Cox's Bazar, Bagaihat in Rangamati, Bagmara and Lathitila in Moulvibazar.

Start Date: 01-02-2008

End Date: 30-06-2010

Program Area:

Commodity:

Objectives:

To find out a suitable nailing density for maximum agar production in agar trees.

Methodology:

The experiment was conducted in three locations namely, location-1 (Boroduara in Chittagong and Fashiakhali in Cox's Bazar), location-2 (Bagaihat in Rangamati) and location-3 (Bagmara and Lathitila in Moulvibazar) of Bangladesh. The plantations of the three locations were established in 2001, 1999 and 1995 respectively. Five agar trees were selected randomly in each experimental plot. In the experiment, 10 cm long iron nails were used for nailing the agar trees. Five blocks were made on the stem in each tree and inserted nails at different densities which were 1 cm x 1 cm, 2 cm x 2 cm, 3 cm x 3 cm, 4 cm x 4 cm and 5 em x 5 cm. In each block nailing was made with nine nails in three rows. The nails were inserted in the selected trees at 8 em above' the ground level. The distance between one block to another was 4 cm. The experiments were set up in February 2008. Ten wood core samples were taken by increment borer from each site after two years in 2010. Collected cores were put into sterilized test tubes and closed with cotton plug. The core samples were preserved in the Forest Protection Laboratory of Bangladesh Forest Research Institute, Chittagong to observe the nature of agar and determine the percentage of agar deposition due to nailing.

Source of Information: Bangladesh Journal of Forest Science, vol.32 (1),(page no: 68-73) Jan-Jun, 2012,Chittagong.

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The present study revealed that the agar formation increases with the age of treated agar . It is concluded that 4cm x4cm nailing distance was found to be the best density of nailing for maximum agar formation and 10-15years old trees give the highest oroduction of agar.

Knowledge Management: Journal