优良能源植物筛选及评价指标探讨

以生产清洁生物质能源为目的,根据能源植物的特征,结合我国耕地少,土壤、气候等差异显著的实际情况,从不同方面选择了化学成分、生物质产量、生态适应性、热值4项指标来评价能源植物的利用价值.根据指标的差异性、重要性以及与生产清洁生物质能源是否直接相关,将4项指标权重分别定为0.3,0.3,0.25,0.15.通过对15种能源植物的评价发现,木本植物如短轮伐期的杂交杨(Populus sp1)、速生柳(Salix Viminal),牧草植物如柳枝稷(Panicum Virgatum)、芒草(Miscanthus spp. Anderss.)、王草(Saccharum Sinese)的植物特征和生物质品质最优,最适于生产清洁生物质能源.这套评价指标能够较好地反映能源植物特性差异和可开发利用的潜力.利用牧草植物生产燃料乙醇比木本作物更有潜力,其种植成本低,管理简便,收益高,生产周期短.

Study on the selection and evaluation on fine energy plants

Aimed at the production of clean biomass energy,according to the current study on the characteristics of energy plants,and considering China's actual situation such as few cultivated lands,diversified climate and soil,we selected 4 indexes from different aspect to evaluate the value of energy plants,these indexes are chemical composition,biomass yield,ecological adaptation,heat value,and according to its difference,importance,and whether or not can be directly contributed to energy production,their weight are set at 0.3,0.3,0.25,0.15 respectively.By the evaluation of 15 kinds of energy plants,we found that Woody plants such as short-rotation hybrid poplar(Populus spl),Fast-growing willow(Salix Viminal),grasses such as switchgrass(Panicum Virgatum),mis- canthus(Miscanthus spp.Anderss.),king grass(Saccharum Sinese),which characteristics of biomass and quality are the best,are most suitable for production of clean biomass energy.There- fore,this set of indexes can reflect the diversity of the characteristics and potetial of energy plants. In the view of the actual production of fuel ethanol,grasses have even more potential than woody plants to grow for biomass energy due to their low cost,simple management,high-yielding,and short production cycle.