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BANGLADESH JOURNAL OF FOREST SCIENCE

A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute

ISSN - Print: 1021-3279 | Online: -
Abstract:

the aim nf the study was to estimate carbon Stockof 18-year old three plantations species
iiamelv Acacia aurietdifonuis Gunn., A&tiidrepfta/ifs c/itnrnsrs Lamk. and Tt’ctonrr ^rmjdrs L.
Systematic sampling method was used to identify each sampling point through the Global
Positioning System (GPS), I ree biomass estimated by Loss on Ignition method and soil carbon
slock was dertemuned by Walklev-Black oxidation method. Results showed that the total
carbon stock was highest 211.119 ton-ha 1 in AcnriitaiirinrhjfcYwis plantation. The maximum litter
carbon was 2.46 ton-ha^ in TtYtoJia jjrandis plantation followed by 1.89 toji-ha-t in Arrttao-ptaMs
rlrijjensis. Selection of plantation tree species according to highest carbon slock capacity may
help the developing countries to earn more carbon err’dits, and in the long rim, to tackle the
climate change.

Abstract:

Aire indica L is an important commercial medicinal phnf and cominerciai.lv cultivated in
the Northern part of Bangladesh, in 2004, a severe leaf spot disease was found in the four
months’ old plantations of Aire iiidim. The svmptom of tile disease was recorded and the causal
organisms were identified. Four types of fungi namely Cflt/iMwiHS Itmdbts Nelson jfc Haasis,
PenirrifiJUH sp., Aspergillus sp. and Firsurinffi &p, were isolated from the infected leaves of A.
Onlv C. iunalus fungus was isolated from the healthy leaves. Out of these, C. hrnjtfus was
frequently found io be? responsible for the disease. Tie pathogenicity test was conducted, and
the association of the fungus with the disease was confirmed. Ihree types of fungicides
Sunvit, Dithane M- 45 and Aimcozim each ” 2gm/l water was applied against the disease.
Pithane M-45 gave the best result among three fungieidcs

Abstract:

Hie coastal environment of Bangladesh
is highly unstable due to direct exposure of
the wind and wave action of the Bay of
Bengal, Moreover, the lite and properties of
die coastal area is alway s at risk (Saenger and
Siddiqi 1993). The newly accreted coastal
lands are not .suitable for any land practices
except afforestation because of a number of
unpredictable geo-morphological changes,
viz. rapid accretion, sand smoothon ing,
sediment winnowing and rapid sillation or
sand dune movements (Das and Biddiqi
1985). Hie pneumatophores of coastal
plantation species spread up laterally and
persist within (he silt layer for a longer time
which also hasten the procedure of
depositing and fixing sills, and thus helps in
stabilization of lands (Siddiqi 2(MH).
Bangladesh is a pioneer country for coastal
plantations (Siddiqi 2001). It is believed that a
permanent green belt along the shoreline and
near the shore and offshore islands of
Bangladesh would considerable reduce the
losses incurred from Ute frequent cyclones
and tidal surges, 11 will abo increase forest
resources and provide ecological security to
the whole coastal area.

Abstract:

Natural regeneration status of native tree species in Dudhpukurta-Dhopachori Wildlife
Sanctuary (DDWS) In Chittagong South Fores! Division, Bangladesh was through
stratified random sampling method. A total of 120 tree species belonging tn If, families were
recorded from 125 plots of 5 m x 5 m in size. Moraceae and Euphorbiaceae families were
represented by maximum number (11) of species, where maximum individuals {TH) no. were
recorded for Dipterotarpaceae tantih from the sampled area (0.3125 ha). Family Relative
Density (FRD), Family Relative Diversitv (FRDI) and Family Importance Value (FIV) index ot
the regenerating tree species were highest for Diptenxarpacw < 15.), Moraceae (9-17 ■■! and Euphorbiaceae (20.5) family respectiveiv. Dtpfrtmirpj^ tarbiiMtas was represented b\ maximum seedlings per hectare (1078) foftowed by Cm™ nemsa (464) and Apumsrt ioJhiluf |4fi4). Seven biological diversity indices were also calculated which ensures promising regeneration status of DDWS. Percentage distribution of seedlings of all species was maximum (80.62%) for the height range of 0-50 cm. Number of seedlings were found to reduce proportimatelv with height growth that indkates poor recruitment of the seedlings in the Wildlife Sanctuarv area. However, Ar#ixutr5 citwa was found tn show maximum (8.91%) seedling recruitment percentage. Considering the findings, it is emphasized the need ot a management plan based on natural regeneration potential for the effective functioning of Dudhpukuria-1 fhopadmri Wildlife Sanctuary,

Abstract:

Coastal plantations mainly with SiMHerafifl fluids have been established by the Forest
Department on the newly accreted lands in the coastline of Bangladesh since 19*65-66, An
underplanting trial of 11 mangrove species was conducted in the existing S. ajritila plantations
along the western coastline [Patuakhali and Bhda) to assess the site-suitability and growth
performance of these species. Sun ival, height and diameter growth data from 16-21 years old
experimental stands of these species were analyzed. The highest survival was found in
EYCurrmu agallodin (62% and 59%) followed bv fiws (51% and 39%) and Xj/lucujpj(s
wAorigeusrf; (48% and 26%) among the I rec species at Rangaba 11 island of Patuakhali and Char
Kukri-Mukri island of Bhcla district. Among the shrub and palm species, the highest survival
was found in twruridu/mw (63%) followed bv fVwju.T ptiudtWJ (58%) and Nyjw
fndieain (4Q%) at Rangabali and the highest survival in P. p/dtithmti (71%) followed be N.
fnitnnus (56%) and A. cornkwtaftmj (46%) at Char Kukri-Mukri. The mean maximum height
growth was observed in E. (9.31 m and 9.29 m) followed by X. Miefcoji^usjs (6.84 m and
6.84 m) and H. Jews (6.19 tn and 5.65 m) in both Ute areas. The mean maximum diameter
growth was also observed in F. flrgnPoc/ifT (9.83 cm and 9.49 cm) followed by X, JMcAragrtisrs (7,97
cm and 7.34 cm) and (5,87cm and 5,34 cm) in bold Ihe nreas. Among the shrub and
palm species, A. curwkwMfwwr, P. pultidier and N. fridtmrs showed good height growth
performance in both die study areas, Therefore, these promising mangrove species (E. rtgiTifodm,
IE follies, X. luekiut^Hsis, A. amtfoulaiittH, P. pithkfcsw and M/hrfk’ims) may be suitable for raising
second rotation crops inside S. tqvtaJa plantations for sustainable management of coastal
forests

Abstract:

Seven plant extracts and seven fungicides were tested to centre! the wilting disease of
Dnlhetjfrt sisstJf’ caused by Ftiwrtitrji srifafti f. Plant extracts of Viir.i
(Nishinda), AijJif/rtk’Wii inditB (Neem), (Vijiijujt tas/hcimi (Tulsi), Tagdei patuia (Gandha),
ftyrfftpiper (Bishkantali), AihrrMfl vasicfi (Basok) and Grutelfo ii-dfej (Thankuni) were
tested tn 100%, 50:. and 25:T conienFrdlion in Cnntroiling the vegetative growth of the fungus.
Basilieum inhibited the highest amount, about 56% growth of the culture. A. vasicn and I7,
jEgHndo wen? the second and third in controlling about 43% and about 42% of the vegetative
growth. C. asiotica controlled 40% while A. mdicn and T. jwtrda controied 39% and 37%. P.
In/drvpifi’r was the least effective antifungal that inhibited about 32% growth of the tested
fungus.

Abstract:

Ruhiwr seed oil is a promising by-product of rubber plant (Htweit lirasi/iensts MuelL Arg.),
lias so far been unknown to the rubber growers of Bangladesh. A Laboratorv-based research
was madft on different aspects of rubber seed oil of fourselected clones (RRlM-fiOO, RRIM-605,
PB-255 and GT-1J grown in toe country. Results show that rubber seeds of the clones contain
2844% edible oil which is will be cheaper than soybean and palm oil, Gas Liquid
Chromatography (GLC) analysis shows that the seed oil contains 83-89% essential unsaturated
fatly acids and 17-22% saturated fatty acid. On the other hand, the seed-cakes contain 29-39%
proteins which is determined by the Macro KjeJdahl Procedure Can he used as animal feed.
Besides, die seed-cakes contain six minerals (N, P, K, Na, Ca and F:e), where percentages
ol N, P and K have been found lobe 5.5%, 2.8%, and 1.4% compared to those in ground nut
(7.1%, 1.3%, and 1,2%) and cotton seed (3.8, 1.1% and 1.4%). It has also been estimated that if
proper initiatives are taken, at least Tk. 49.32 crore could be earned per annum from toe seed
oil of the existing 37,64b ha plantations of the country. The seed oil and the deroiled seed-cakes
will not only create emptormerit opportunity and ffow of eionumic activities, but will also save
substantial amount of foreign exchange from importing other edible oils and the essential
ingredten Is o f anima I feed.

Abstract:

The composition and diversity of native tree species of Moulvibazar natural forests of
Sylhet Forest Division were investigated. A total of 1,051 individual stems having dbh of & 5cm
were recorded from 1.44 ha sampled area. These comprise 81 native bee species belonging to
59 genera under 33 families. Moraceae and Euphorbiaceae dominated in the Study area
containing 9 and 8 species respectively followed by Rubiaceae (7), Myrtaceae and Vefbenaceae
(6 species each). Average species diversity was 3.4L) and ranged from 3.21-3.61 in the studyarea. Species similarity index was highest (69.72%) between Lawachara and Adampur followed
by Adampur and Gubindapur (65-4%) and lowest (62.7″i>) between Lawachata and Gi’bindpur.
Tree density was found 573 stems ha’1 in Lawachara, 860 stem ha J in Adampur (Kalengi) and
756 stems ha”1 in Gobindapur. Artoccrptts eftawa showed the highest (32,63 m2) basal area rn
Lawadiara followed by Liigerstrarraiir ptiroi/tara (6.98 tn2) and Cliiikrirsir wfiittW (5.74 m2), but in
Adampur maximum basal area showed by fyzygitiNrJinwiV (2.39 in2) followed by Artorpirs
c/jfijrju (2,04 m2), CasfaiJcpsrs tribidordea (1.24 m2), while in Gobindapur, meximam basal area
recorded for ftotrnirpre; vnnnwit (1.31m2) followed by Atia.’fltpits dtaitm (1.(34 m2) and l/tiex
ptfesrrns (0.82 m2). Highest Importance Value Index (TV!) in Lawadiara natural forests was
86.92 for Arhymprrx ttaw followed by I ngeralnriuin ptinriflwa (29.53), Chukraiia ivlutina fl5-11},
but in Adampur Sy^iunj firmum attains the highest IVI (39.92) followed by Casfimppsts
fribdoitfcs (17.62), Artomrpns dmjjir (17.46), Lagerstroemia pantiflom (15.62) and Efa’ocnrpws
rrjrjrjjir (15.41), while, in Gobirtdapur, the highest IVI was recorded for FforciTtfpjis uantmtf
(22.32) followed by Vita pubescetts (15.06) and Si/zygititti[omasum (14,71

Abstract:

An experiment was conducted to find out the strength properties and dimmsfonal
stability of particleboard using waste wood and planer shavings Collected from Bangladesh
Forest Industries Development Corporaholt (Bl-1 DC). Waste WOod were converted in in chips.
Particleboards were fabricated at fhe different ratios of wood chips and planer shaving such as
100:0, 75:25, 50:50, 25:75, and 0:100, Results show (hat particleboards made from 100% planer
shavings have good static bending properties : 143 kg/cm2) and excellent tensile strength
(13 kg/cuv). Both the values satisfy the Indian and British standard. Tilt1 percentage of
thickness swelling and water absorption were measured a tier 2 and 24 hours soaking in water,
lowest thickness swelling and water absorption were found in the board made of 100% planer
shavings. Particleboa ids made from 75% and 50% planer shavings also satisfy the Indian
standard. It is concluded that planer shavings from different wood based industries can he
used for making conventional partiilebuard of high strength properties.

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