The scale and characteristics of eucalyptus plantation construction determined that it had a tremendous impact on ecological environment, this impact may be positive or negative. Moreover, through screening environmental impact factors and analyzing environmental impact quantificationally, the economic cost-benefit analysis of environmental impact on the eucalyptus plantation construction in North Gulf of Guangxi was carried out. The results showed that the environmental benefit of plantation construction was 63.35 × 108 Yuan/a, the cost environmental was 46.9 × 108 Yuan/a, the net benefit was 16.45 × 108 Yuan/a, the ratio of benefits to costs was 1.35: 1. Those indicated that eucalyptus planting planning was reasonable and feasible, and could realize ecological and economic sustainable development, which provided scientific basis for planning decisions.%按树人工林建设的规模和特点决定了它对生态环境的影响较大,这种影响有正效益和负效益两个方面.通过环境影响因子的筛选和环境影响的定量分析,对广西北部湾60万hm桉树人工林种植规划的生态环境影响效益和损失进行分析.评价结果显示,按树人工林建设环境效益为63.35×10元/a,环境损失为46.9×10元/a,环境效益的净现值为16.45 x 10 元/a,环境效益和环境成本的比值为1.35:1.表明广西北部湾桉树种植规划合理可行,可以实现生态、经济的可持续发展,为规划决策提供科学的依据.
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