草业学报2012，Vol.21Issue(2)：92-98,7.
添加青稞酒糟对西藏地区青稞秸秆和高羊茅混合青贮发酵品质的影响
Effect of adding wet hulless barley distillers' grains on fermentation quality of mixed ensilage of hulless barley straw and tall fescue in Tibet
摘要
Abstract
The effect of adding wet,hulless barley distillers' grains (WHDG) on the fermentation quality in mixed silage of hulless barley (Hordeum vulgare) straw and tall fescue (Festuca arundinacea) during ensiling was assessed.There were three treatments of different WHDG addition ratios (10%,20% and 30% of fresh weight) plus a control.The silos were opened on 7,14 and 30 days after ensiling and the fermentation quality was analyzed.WHDG addition significantly improved the mixed silage fermentation quality,as indicated by a sharp accumulation of lactic acid (LA) (P<C0.05),faster decline of pH,lower butyric acid content (BA) and NH3-N/total N (P<0.05) as compared with control silage.These results indicated that WHDG addition not only effectively inhibited the activity of aerobic bacteria,but also speeded-up and greatly enhanced lactic acid production and pH reduction.This restricted the utilization of water soluble carbohydrate by undesirable bacteria and reduced the loss of water soluble carbohydrate,leaving more residual water soluble carbohydrate for lactic acid bacteria.From results of the present study,it is suggested that 20% WHDG addition is effective for improving the fermentation quality of mixed ensilage of hulless barley straw and tall fescue.关键词
青稞酒糟/青稞秸秆/高羊茅/混合青贮/发酵品质Key words
wet hullessbarley distillers' grains (WHDG)/hullessbarley straw/tall fescue/mixed ensilage/fermentation quality分类
农业科技引用本文复制引用
原现军,余成群,李志华,下条雅敬,邵涛..添加青稞酒糟对西藏地区青稞秸秆和高羊茅混合青贮发酵品质的影响[J].草业学报,2012,21(2):92-98,7.基金项目
西藏主要农作物秸秆与栽培牧草混合青贮关键技术研究(XZ20093ZD)和"十二五"国家科技支撑计划"藏北退化草地综合整治技术与示范"(2010BAE00739-03)资助. （XZ20093ZD）
