草业学报2016，Vol.25Issue(10)：142-152,11.DOI:10.11686/cyxb2015519
添加剂对玉米秸秆和莴笋叶混贮品质的影响
Effects of additives on the mixed silage quality of corn stover and asparagus lettuce leaves
摘要
Abstract
In this study,the effects of different additives on the mixed ensiling fermentation characteristics of dry corn stover (DCS)and asparagus lettuce leaves (ALL)were investigated under laboratory conditions.Four different treatments were measured:control (CK),formic acid (final concentration of 3.0 mL/kg material, fresh weight,FA),Lactobacillus delbrueckii (final concentration of 1×10 5 cfu/g material,LD)and a combi-nation of formic acid and L.delbrueckii (FA+LD).Silages were prepared in 1.5 L laboratory-scale glass silos at ambient temperature for 50 days.Ensiling samples were removed from the sealed containers for analysis ev-ery 10 days.The results showed that for the FA treatment,the pH value,cellulose,hemicellulose and lignin content,and the ammonia nitrogen to total nitrogen ratio (AN/TN)decreased significantly during the ensiling process (P <0.05),while lactic acid (LA)content increased (P <0.05).After ensiling for 50 days,the high-est LA content,the lowest pH,AN/TN and dry matter (DM)loss were found in the FA treatment,indicating good fermentation quality.The DM loss and AN/TN of the LD treatment were significantly higher than the control (P <0.05).The pH value of the LD treatment was higher than 4.2.The silage quality the LD+FA treatment was higher before 30 days than at 40 and 50 days;the AN/TN increased substantially after 40 days and was 10% higher than the recommended value for good quality silage.Based on these results,it is suggested that formic acid can be used as an ensiling additive to improve silage fermentation quality and to prolong the preservation of DCS.However,it is also necessary to consider the cost of formic acid.关键词
干玉米秸秆/莴笋叶/混贮品质/添加剂/德氏乳杆菌/甲酸Key words
dry corn stover/asparagus lettuce leaves/mixed silage quality/additives/Lactobacillus del-brueckii/formic acid引用本文复制引用
任海伟,窦俊伟,赵拓,李雪雁,李志忠,李金平,孙文斌,黄娟娟..添加剂对玉米秸秆和莴笋叶混贮品质的影响[J].草业学报,2016,25(10):142-152,11.基金项目
国家自然科学基金（51366009，51666010），国家高技术研究发展计划（863）（2014AA052801），甘肃省自然科学基金（1506RJYA106，1508RJYA097）和兰州市科技计划项目（2014-2-20）资助。 （）
