The well-known biomass material, cellulosic bioenergy grasses such as switchgrass (Panicum virga-tum), silverreed (Triarrhena sacchariflora) and giantreed (Arundo donax), are important bioenergy plant resources with great development potential. In this research, the evaluation of economic benefits and ecological values was employed in the entire process from the farming culture of cellulosic bioenergy grasses to the production of cellulosic ethanol. During the production of cellulosic ethanol from the biomass of these grasses, the economic benefits were 4 147. 85, 1 185. 08 and 2 019. 76 yuan RMB per tonne cellulosic ethanol for the three grasses respectively, and from an economic point of view, switchgrass is economically optimal, followed by giantreed, and then silverreed. The ecological value of air purification was 4 639. 28, 4 351. 25 and 4 320. 39 yuan RMB per tonne, respectively, and from an ecological point of view, switchgrass is ecologically optimal, followed by silverreed, and then giantreed. The potential for CO2 fixation of switchgrass, silverreed and giantreed are huge and have a positive effect on the reduction of CO2 concentration, greenhouse gasses, and the accumulation of soil carbon.%纤维素类能源草是一类重要的能源植物与良好的生物质资源.对柳枝稷、荻、芦竹3种纤维素类能源草从农业种植到纤维素乙醇制备的整个过程进行了经济效益与生态价值的初步评价,结果表明,以柳枝稷、荻、芦竹为原料,每制备1.00 t纤维素乙醇的经济效益分别为4 147.85,1 185.08,2 019.76元,柳枝稷最优,芦竹次之,荻再次之；每制备1.00 t纤维素乙醇所需种植的柳枝稷、荻、芦竹的大气净化生态价值分别为4 639.28,4 351.25,4 320.39元,柳枝稷最优,荻次之,芦竹再次之；3种纤维素类能源草均具有强大的固定大气CO2的能力,对于降低温室气体CO2浓度、促进土壤碳的积累具有积极作用.
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