能源植物狼尾草品种筛选评价指标分析

The Analysis of Evaluating Indicator of Screening Kinds of Energy Plant Pennisetum

采用层次分析法建立以能源利用为目的的狼尾草品种筛选评价模型,从生产性能、生物质理化性质、生态适应性以及经济指标等四个方面评价不同狼尾草品种的利用价值.生产性能,单位土地面积的生物质产量是品种筛选评价的首要指标;从乙醇生产角度出发,理想的品种应有较高的纤维素含量和较低的木质素、半纤维素含量;采用直接燃烧、致密成型、热解气化等利用方式,则要求理想的品种应有较高的木质素、纤维素含量和较低的灰分含量.此外,多年生的、能够利用种子繁殖建植草场的、具有较强抗逆性的品种,有利于降低生物质原料的生产成本.

A evaluating indicator of screening the kinds of energy plant pennisetum model was proposed by using AHP.Four relative inspects such as production performance,physicochemical property of biomass,ecological adaptation and economic indicators were used to evaluate the value of different kinds of pennisetum.Production performance which is the biomass production of the unit area,was first index of evaluating and screening.From producing ethanol,the perfect variety should have higher cellulose and lower lignin or hemi cellulose. By using some ways such as direct combustion, compact shaping, pyrogenation and gasification, the ideal variety should have higher lignin, higher cellulose and lower ash content. In addition, the perennial variety which had strong stress resistance and could reproduce by seeds was beneficial to reducing the production cost of biomass feedstock.