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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。
Using multistage random sampling method, we surveyed 45 idyllic forests on the offshore islands of Bangladesh and evaluated the contribution of plant diversity to the ecological, socio-economic conditions of local farmers. Pastoral area by size is divided into large (> 0.25hm2), (0.05-0.25hm2) and small (<0.05hm2) three categories. The average annual income of different plants in the garden ranges from US $ 95.5 to US $ 291.67. The idyllic trees of the offshore islands supply mostly farmers’ wood fuel and are resistant to frequent hurricanes, but they do not meet the nutritional needs. The paper also points out the limitations of pastoral farming and gives some suggestions, such as adequate supply of rapidly growing native species and protection of endangered species to meet the needs of farmers and maintain ecological balance. Figure 2 Table 3 Reference 20.