草业学报Issue(6)：111-118,8.DOI:10.11686/cyxb20140614
添加糖蜜和乙酸对西藏发酵全混合日粮青贮发酵品质及有氧稳定性影响
Effects of molasses and acetic acid on fermentation and aerobic stability of total mixed ration silage in Tibet
摘要
Abstract
An experiment was undertaken to study the effects of acetic acid or/and molasses on the quality of fermented total mixed ration silage.Treatments:silage fermented without additive (control),with acetic acid (0.3% fresh matter basis),with molasses (3% fresh matter basis),or with acetic acid+molasses.There were 20 silos per treatment.All silos were opened 45 d after ensiling;five silos per treatment were analysed to deter-mine fermentation characteristics,the remaining silos were exposed to air for 12 d to evaluate aerobic stability. After 45 dall silages were of good quality having high lactic acid concentration,low ammonia/total nitrogen, low butyric acid and very little propionic acid.During aerobic exposure,lactic acid,acetic acid and water solu-ble carbohydrate tended to decrease in all silages.The pH of the control and molasses treated silages increased significantly to 5.70 and 6.50 respectively and ammonia/total nitrogen and yeast counts were higher than the acetic acid and acetic acid+molasses treatments after 12 days of exposure.However,adding acetic acid reduced ammonia/total nitrogen compared with the control.Lactic acid content in the acetic acid and acetic acid+mo-lasses silages increased during the early stages of aerobic exposure and then slowly decreased.Undesirable bac-teria and yeast counts in the acetic acid treatment remained at low levels during aerobic exposure and the pH re-mained at about 4.50.It is concluded that adding 0.3% acetic acid maintained fermentation quality and im-proved the aerobic stability of fermented total mixed ration silage.关键词
糖蜜/乙酸/发酵全混合日粮/发酵品质/有氧稳定性Key words
molasses/acetic acid/fermented total mixed ration/fermentation quality/aerobic stability分类
农业科技引用本文复制引用
邱小燕,原现军,郭刚,闻爱友,余成群,巴桑,邵涛..添加糖蜜和乙酸对西藏发酵全混合日粮青贮发酵品质及有氧稳定性影响[J].草业学报,2014,(6):111-118,8.基金项目
国家科技支撑计划（2011BAC09B03）和中国科学院西藏区域创新平台建设项目（XZ20093ZD）资助。 （）
