京郊挖沙废弃地能源草生产潜力评价

能源草是一种良好的生物质资源。为分析其在边际土地上的应用前景,在京郊挖沙废弃地上开展了柳枝稷(Panicum virgatum L.)与芦竹(Arundo donax L.)两种能源草的规模化种植,并从生物质产量和生态经济价值角度研究了其生产潜力。在京郊挖沙废弃地上,两种能源草均能获得较高的生物质产量,分别为3.77、 11.45 t·hm^-2;从固定二氧化碳、释放氧气、吸收二氧化硫、滞降粉尘4个方面核算其生态价值,按标准煤折算、纤维素乙醇制备两种方式核算其经济价值,两种能源草的生态经济价值非常可观。柳枝稷和芦竹两种能源草在京郊挖沙废弃地上的发展前景广阔。

Evaluation for Production Potentials of Bioenergy Grasses Grown in Abandoned Sandpits in Beijing Suburb

Well-known biomass resources, two kinds of bioenergy grass, switchgrass (Panicum virgatum L.) and giantreed (Arundo donax L.), were cultivated on a large scale, in abandoned sandpits in Beijing suburb, and the biomass yields and ecological-economic values were investigated in order to research their production potentials in marginal lands. With high biomass yield, of 3.77 t·hm^-2 and 11.45 t·hm^-2 respectively in abandoned sandpits in Beijing suburb, these bioenergy grasses have high ecological values due to their ability to fix carbon dioxide, release oxygen, absorb sulfur dioxide and retard dust, as well as high economic benefits due to the conversion of standard coal and the production of cellulosic ethanol. In conclusion, the two bioenergy grasses have tremendous production potentials in the future in abandoned sandpits in Beijing suburb.