中国农业大学学报2012，Vol.17Issue(6)：138-142,5.
收获时间对黄土高原柳枝稷生物质产量与燃料品质的影响
Effect of harvesting periods on biomass yield and fuel quality of switchgrass in the Loess Plateau of China
摘要
Abstract
The objective of this experiment is to evaluate the variation in yield and fuel quality of switchgrass biomass under different harvesting periods and to determine appropriate harvesting periods.Field trials were conducted in Qingyang,Gansu Province,to evaluate biomass yield and fuel quality of switchgrass under different harvesting time in order to determine the proper harvesting time.The results were as follows:1) with the delayed harvesting period,yield of switchgrass presented downtrend,and the proportion of leaves reduced gradually.It indicated that yield loss was mainly due to leaf abscission.2) The heat value of switchgrass biomass showed a decreasing tendency as a whole,it was significantly higher at the flowering stage than other periods;delayed harvest significantly reduced moisture and ash content of switchgrass biomass;with the delayed harvesting period,cellulose and lignin content in stems and leaves increased,while hemicelluloses content decreased;undesirable components of mineral element such as K,Mg,Na,Cl were significantly reduced after switchgrass withered,and the fuel quality of switchgrass biomass improved.3) In the pattern of energy production of switchgrass,switchgrass biomass fuel quality was better when harvested at the end of growth season,after the decline of above-ground parts.关键词
柳枝稷/能源植物/收获时间/生物质产量/燃料品质Key words
Switchgrass/energy plant/harvest time/biomass yield/fuel quality分类
农业科技引用本文复制引用
刘吉利,吴娜,熊韶峻,程序,朱万斌..收获时间对黄土高原柳枝稷生物质产量与燃料品质的影响[J].中国农业大学学报,2012,17(6):138-142,5.基金项目
国家自然科学基金 （）
宁夏大学科学研究基金 （）
