杂交狼尾草作为能源植物的产量和品质特性

于2006～2009年在北京地区进行田间试验,研究杂交狼尾草作为草本能源植物的适应性、生物质产量和品质特性。结果表明:在北京地区杂交狼尾草不能越冬,其干物质产量可达40.14～48.54t/hm2,热值为17.02MJ/kg,纤维素、半纤维素、木质素含量分别为36.15%、21.01%和8.92%,碳、氢、氮元素含量分别为41.86%、5.62%和1.52%,C/N为27.54∶1,灰分含量为9.26%,灰熔点的变形温度、软化温度、半球温度和流动温度分别为942.0℃、980.8℃、1010.3℃和1054.8℃。杂交狼尾草适宜作为草本能源植物在北京及周边地区推广应用,但存在不能越冬和生物质含水量下降速率慢的缺点。

Biomass Yield and Quality of Hybrid Pennisetum

The objective of the experiment was to evaluate the adaptability,yield,and biomass characteristics of hybrid pennisetum(Pennisetum americanum × P.purpureum) in Beijing of China for their rational utilization as bioenergy feedstocks.Field trials were conducted at experimental station of Beijing Research & Development Center for Grasses and Environment from 2006 to 2009 and the biomass yield and quality parameters were investigated by field observations and laboratory analysis.Hybrid pennisetum could not survive through the winter in Beijing,its dry biomass yield was 40.14~48.54 t·hm-2,heat value was 17.02 MJ·kg-1,contents of cellulose,hemi-cellulose,lignin and ash were 36.15%,21.01%,8.92% and 9.26%,respectively,contents of C,H,N elements were 41.86%,5.62%,1.52% respectively,ratio of C to N was 27.54∶1,and its deformation temperature,softening temperature,hemisphere temperature and flow temperature of ash fusion were 942.00℃,980.75℃,1010.25℃,1054.75℃ respectively.Hybrid pennisetum was appropriate for extension in Beijing and surrounding areas as excellent herbaceous energy plants because of its high biomass yield and quality,and the disadvantage of hybrid pennisetum was its poor wintering ability and high biomass moisture content.