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
Functioning and productivity of forest ecosystems vastly dependents on the phenological characteristics of the tree species. The study was carried out from June 2017 to December 2018 to explore the phenological traits of 74recalcitrant seed bearing tree species of natural forests and plantations in Bangladesh. Data were collected from Chittagong University campus, Hathazari, Boalkhali, Hazarikhil, Dohazari, Rangamati, Kaptai, Ukhiya, Bandarban and Khagrachari through repeated field visits including review of published papers. The results showed that flowering, fruiting and seed maturity periods varied from species to species. The Seventy Four tree species belongs to 55 genera of 31 families. Maximum (39.19%) fruits were under the Berrycategory and minimum (1.35%) in Samara. The study revealed that floweringof maximum species occurred during March (54.05%) and fruiting inMay(54.05%). The peak period for collecting viable recalcitrant seeds was foundboth in May and June (36.49% respectively). The study will be a readyreference with information on flowering, fruit initiation and seed collection time of 74 recalcitrant seed bearing trees of Bangladesh. The findings of thestudy may be useful to the nursery owners, foresters, and private plant growers for collection of seeds in right time and establishment of the plantations. This paper may also be a supportive document to the policymakers in taking decision on raising seedlings of recalcitrant seed bearing trees for mass plantations towards the greening program of the country.
Dendrocalamus giganteus, known as giant
bamboo, is the tallest among the bamboos,
measuring on an average about 25 m high and 25
cm diameter. It is cultivated in Cox’s Bazar,
Banderban, Chittagong, Mymensingh, Panchagar,
Jessore and some other Districts ofBangladesh. Its
local names are wara bans, bhudumbans, bombai
bans, raja bans, kanchan bans, etc. It grows
luxuriantly in all the flood free areas.
It was reported earlier that D. giganteus
flowered at Calcutta Botanical Garden, India in
1860-61 and again in 1888 and in Burma in 1892
(Gamble 1896). Lahiri (1974) reported that one
clump introduced during 1880-88 at Kurseong
Division, India flowered in 1974. Bahadur (1979)
reported flowering of this species at Forest
Weight
(gm)
0.042
Weight
(gm)
0.050
Length
(cm)
0.726
Width
s/s (cm)
0.32
Width
v/d (cm)
Average* 0.286
Maximum
Research Institute campus, Dehra Dun in 1979. As
reported by Gupta (1982), one clump flowered in
1981 along the Tuli-Wokha road of Nagaland,
India.
The exact flowering cycles (from seed to seed) ofbamboos are known for few species. Most of the pastreports on bamboo flowering cycles are
based on speculation and estimation (Hasan 1973, Banik 1991). The flowering cycles for many species of bamboo from India, Bangladesh and
Myanmar were reported (Cavendish 1905, Blatter 1930, Bor 1941, Hasan 1973, Bahadur 1980, Naithani 1990, Banik 1991, Alam 1995). This paper
presentsthe estima ted flowering cycles of Bambusa burmanica Gamble, B. cacharensis Majumdar and B. jaintiana Majumdar based on past records and recent flowering (Table 1)
Welcome to the Bangladesh Journal of Forest Science (BJFS) – a leading platform for advancing the knowledge and understanding of forest science in Bangladesh and beyond. Established with a commitment to excellence, BJFS serves as a cornerstone for researchers, practitioners, and enthusiasts dedicated to the sustainable management and conservation of forest ecosystems.
