摘要
An explanatory survey was conducted to assess the contribution of plant diversity to the ecological and socio-economic condition of the rural household in the offshore island of Bangladesh. Assessment was done by means of multistage random sampling. The homestead sizes of the study area were classified into 3 groups viz, large （〉0.25 ha）, medium （0.05-0.25 ha） and small （〈0.05 ha） based on the result obtained from a preliminary survey, and a total of 45 homesteads, 15 from each group, were selected randomly for the study. The average annual income from homestead＇s plant diversity varied from Tk 5730.00 （US$95.5） to Tk 17500.00 （US$291.67）. The rural people were mainly dependent on their homegarden for woodfuel and nutritional requirement as forest was unavailable in the island. The rural people here also cultivated the plant species as a safety measure from frequent cyclone. Constraints hindering the development of homestead plantation were identified and suggestions were given such as the adequate supply of seedlings of fast growing native species and conservation of endangered species to meet the demand of the household as well as to keep ecological balance.
利用多级随机取样法调查了孟加拉国近海岛屿45个田园树林,评价了植物多样性对当地农户生态、社会经济条件的贡献。田园按面积大小分为大(>0.25hm2)、中(0.05-0.25hm2)和小(<0.05hm2)三类。田园不同植物年平均收入在US$95.5至US$291.67。近海岛屿的田园树木主要供应农民的木燃料和抵御频繁的飓风,但并不能满足营养方面的需求。本文还指出了田园种植所受到的限制,给出了一些建议,例如,充足地供应快速生长的本地树种和保护濒危种来满足农户需求,保持生态平衡。图2表3参20。
