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
Vegetable dye was extracted from the seeds of sinduri {Bixa orellana (Linn.)} using water (soaking method) and ethyl acetate (soxhlet and reflux methods) as solvents. Reflux method gave the highest yield (10.1%) while soxhlet method yielded 7.10% of dye. In soaking method, seeds were soaked in water for four different time periods. The highest yield (8.93%) was obtained in 18 hours out of 6,12. 18 and 24 hours soaking periods. Considering the chemicals and processing cost, water soaking method appeared the best although it gave slightly lesser amount of dye compared to other methods. The performance of the extracted dye for its edibility was studied in laboratory against rats. After feeding the dye, mixed with waler, the physiological changes of rats were observed. The test showed no adverse effect, and it seemed that the dye is non-toxic to animals. Thus, it can be suggested as a substitute to chemical dye as food colourants.
Sissoo (Dalbergia sissoo), koroi (Albizia procera), akashmoni (Acacia auriculiformis),
babla (A. nilotica), mahogany (Swietenia macrophylla) and raintree (Samanea samari) are the six
major species planted on the embankments and roadsides in the coastal areas of Bangladesh.
Growth data of these species were collected from the area, and growth models were selected by
regression techniques. The selected models may be satisfactorily used for the species in the area.
This paper attempts to explore the impacts of villagers living in the vicinity of the forest
area on forests and forest resources. For this, a survey was conducted on 171 households of eight
locations. The households were grouped into three farm categories upper, middle and lower.
From PRA exercise it was found that there was an overall shortage of fuel wood and other low
cost house-building materials. The villagers were partially dependent on the forest resources. The
lower farm category had the lowest number of bamboo than those of the upper and middle farm
categories. In upper, middle and lower farm categories, the forest and non-forest tree ratios were
found to be 67:33, 41:59 and 72:28 respectively and for all it was 60:40. The average tree income
ratios of homestead and forest were 57:43, 38:62 and 29:71 for the upper, middle and lower farm
categories respectively and for all it was 41:59. The average incomes from the business were 63%
for upper and 73% for middle and lower farm categories. The major shares of income (70%) came
from the business. Highest (25%) depletion of forest resources were in Bagerhat and the lowest
(4%) in Noagaon. It was elicited that the forest was depleted by about 12.5% annually.
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.
