BANGLADESH JOURNAL OF FOREST SCIENCE
A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute
A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute
Dendrocalamus Strictus Nees-was introduced to Hazarikhil during the year 1939 (Hasan 1978). Eight offsets of this species were collected from that area and planted in the Forest Research Institute campus (FRI), Chittagong in 1974. Later on, during 1981-1982, five clumps were also
raised in Keochia Research Station through offsets collected from the same mother clump of Hazarikhil.
Micrococca mercurialis ( Linn. ) Benth (Euphorbiaceae) cited as CaloxyIon mercurialis Thwaites by Hooker ( 1887) was reported by the same author as occurring at Mongir of Behar, the Deccan Peninsula, Burma and Ceylon. It is distributed in Arabia and tropical Africa. Prain ( 1903) reported it from Behar. This species has recently been collected from Chittagong district. In the various floristic works by Heining ( 1925 ), Raizada ( 1941 ), Datta and Mitra ( 1953), Sinclair ( 1955) and Khan and Banu ( 1972) the species has not been recorded from the region now under Bangladesh.
Based on availability and strength properties, eight indigenous species were selected as alternatives to Garjan for use as railway sleepers.
The sleepers were put to service test in the main track of the Bangladesh Railway. The performance of seven of them has been found satisfactory
and, therefore, are recommended for use as railway sleepers.
The paper includes a field key of 12 species of Bangladesh Loranthaceae based on their leaves and indumentum characters. Brief taxonomic notes on vegetative characters of the species, their flowering time and distribution in Bangladesh have been presented.
Local substitutes for expensively imported malt extract and dextrose in agar media in the form of sugarcane gur and glaxose respectively were investigated. Colony diameter of 14 fungi and mycelial dry weights of 9 fungi were compared on 2 % malt extract agar (MA) and 2,3, 4 and 5% sugarcane gur agar (GA) ; potato dextrose agar (PDA) and potato glaxose agar (PGA). Diameter giowth on 4 % GA and PGA was comparable to 2 % MA and PDA respectively. Four per cent gur is recommended for GA medium. Glaxose is incorporated in PGA at the same rate as dextrose in PDA. Gur frem 4 different localities in Bangladesh incorporating 4% GA resulted in
insignificantly different colony growth of the two fungi tested.
Sundri wood chips were subjected to a mild chemical pre-treatment by soaking them in 1,2 and 3% solutions of NaOH and Na2SO3, individually as well as in mixture, for 24 hours at atmospheric conditions. Hardboards made from pre-treated chips were tested for determining their strength and water resistance properties. It was observed that the boards made from the chips pre-treated with NaOH alone and in mixture with Na2SO3 were stronger than those made by simple steam softening of the chips prior to refining. Also the strength of the hoards increased with an increase of the concentration of the pretreatment solutions. Pre-treatment with NaOH alone produced stronger boards than with the mixtures. Any such effect on the strength property of the boards, however, was not obvious in the pre-treatment with Na2 SO3 solutions. AU the pre-treatment methods adversely affected the water resisting properties of the boards.
Calamus longisetus Griff. (Palmae) has been recorded to be distributed in Andaman Islands, Burma, Thailand, Indonesia and Malay Peninsula (Beccari and Hooker 1892-93 ; Blatter 1926 ; Dransfield 1979 ; Basu and Basu 1987). The various floristic works by. Becaari and Hooker ( 1892—93), Prain (1903a; 1903b), Brandis (1906), Heinig ( 1925), Raizada (1941 ), Sinclair (1955) and Khan et al. (1984), have not recorded its occurrence in the region now under Bangladesh.
Soybean is a small genus of twining and sub—erect harbs, distributed throughout the tropics of Asia, Africa and Australia. Soybean, also called Chinese bean, is considered one of the most important cultivated legume and is one of the five sacred grains, rice, soybean, barley, wheat and millet, essential to the existence of Chinese civilization. It is learnt from the ’Meteria Medica’ written about A.D. 450 that soybean was not paisonous but regarded as a specific remedy for proper functioning of heart, liver, kidney, stomach and bowels. It was also used as a stimulant
for lungs, for eradication of poisons from the system, improvement of complexion and stimulant for growth of hair. It is also called poor man’s meant due to its high protein content (2).
The production of soybean which for many centrries was confined to the countries of Asia, spread rapidly to the rest of the world and in recent years, it has attained great importance in the U.S.A, as a raw material for industry. Cultivation of soybean has gained momentum in all the American countries and in the U.S.S.R., Rumania, Bulgaria, Yugoslovia, etc. However, attempts to popularise soybean in India as pulse was not met with success due to the presence of other widely used pulses.
In recent years, we have become used to soybean oil which is comparatively cheaper. Now, if cultivation of soybean is introduced in our country, we can meet our demand of edible oil, which has become a scarce material. Once it is grown abundantly, it will then surely find other uses as raw meterials of industries.
This paper deals with the effect of two growth hormones, IAA and IBA in the rooting response of stem cuttings, rooting of branches by air layering through the application of Seradix B-3, and bud and cleft graftings of six species in different months. It was found that rooting occurred in four species with hormone applications to stem cuttings ; of these, three species rooted throughout the year. In air layering, four species roofed only in August-September. Bud grafting were successful in all the species. Bud propagation in April-May was the most successful. Fair results
were also obtained from budding in November-December. Cleft grafting did not show much response in any of these species.
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