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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:

A comparative growth study of Avicennia officinalis, A. alba and A. marina along
the eastern shorelines of Bangladesh showed an average annual diameter increments of
0.99, 0.90 and 0.97 cm respectively for plantations varying 11 and 16 years age. Average
annual height increments of these species were 0.31, 0.37 and 0.31 m respectively.
Annual volume production per tree was 0.025, 0.025 and 0.024 m3 respectively. All the
individuals of Avicennia species had a promising growth and the plantation was
successful along the eastern coast of the country. On the contrary much human
interference was observed on the established plantations. The growth of Avicennia
officinalis, A. alba and A. marina showed that plantation areas and newly accreted lands
may be suitable for planting with Avicennia species.

Abstract:

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 treatments in 25 selected agar
trees in three locations with the five experimental sites, Boroduara (Chittagong),
Fashiakhali (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
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 ?o oleoresin deposit was found in 15 years old agar tree.

Abstract:

Aboveground nighttime respiration behavior of Kandelia obovata Sheue, Liu and
Yong was measured from 10 sample plants growing in the mangroves of Okinawa
Island, Japan. The dependence of the respiration on the tree size was successfully
represented by a power function of Do 1h2H. The respiratory behavior of K. obovata was
found dependent to size and the exponent was close to 3/4. The size-dependence of
respiration could be successfully represented by a power function of D01h2H.

Abstract:

A field experiment was conducted for 4 years on patipata to find out the
relationship between planting spacing and yield potential. Three different propagules
viz. rhizome, branch cutting and rooted branch cutting were used as propagating
prologules. Production of average number of harvestable culms ranged from 506 to 560
plot’1 of 18 m2 area maintained in five different spacing on a four-year harvesting cycle

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:

Insecticidal activity of ivermectin (Ivecop- 12), a derivative of ivermectin B,
produced by a soil actinomycete, Streptomyces avermitilis, was evaluated in laboratory
against the larvae of bamboo leaf roller, Crypsiptya coclesalis Walker (Lepidoptera:
Pyralidae), a major defoliator of bamboos in nurseries, plantations and natural forests.
The study was
doses. Results revealed that ivermectin is
conducted with eight treatment concentrations of lethal and sub-lethal
highly toxic and induce larval mortality
when applied separately on host plant leaves and larvae, on leaves and larvae of the
insect pest together and leaf rolls containing larvae. The nature of treatment affects the
larval mortality. On the basis of two trials, results revealed that treatment of leaves and
larvae together showed cent percent larval mortality by the 0.15% concentration,
whereas treatment of leaves alone and leaf roll exhibited cent percent mortality by the
concentration of 0.3%. Larval treatment showed hundred percent mortality by 1.2%
concentration. The LC50 value of the tested product was worked out to be 0.012239,
0.076789, 0.010833 and 0.051116% for leaf and larval treatments separately, leaf and
larval treatments together and leaf roll treatment respectively against the insect pest.
This clearly shows that ivermectin is more
through food

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