饲料研究2025，Vol.48Issue(1)：163-169,7.DOI:10.13557/j.cnki.issn1002-2813.2025.01.028
不同添加剂和贮藏时间对苜蓿青贮品质和霉菌数量的影响
Effects of different additives and storage time on quality and mold quantity of alfalfa silage
摘要
Abstract
The experiment aimed to investigate the effects of organic acids,microbial agents,and enzyme preparations,both individually and in combination,on the quality and the number of molds of alfalfa silage,and to determine the appropriate additives and storage times.Purple alfalfa(Medicago sativa L.)was used as the experimental material,and a two-factor random trial design was adopted,with a total of six groups,each with three replicates.The groups were as follows:The control group(CK group),the 5 g/t silage fermentation agent group(CK+group),the 0.2％benzoic acid+0.2％citric acid+0.5 g/t composite microbial group(T1 group),the 0.2％benzoic acid+0.2％citric acid+0.5 g/t composite microbial+0.3 g/kg β-glucanase group(T2 group),the 0.2％benzoic acid+0.2％citric acid+0.5 g/t composite microbial+0.3 g/kg xylanase group(T3 group),and the 0.2％benzoic acid+0.2％citric acid+0.5 g/t composite microbial+0.3 g/kg β-glucanase+0.3 g/kg xylanase group(T4 group),with storage times of 7,15,25,35,55,and 60 days.The results showed that storage time and additives significantly affected the fermentation quality,nutritional quality,and microbial quantity of alfalfa silage(P＜0.05),the interaction between storage time and additives significantly affected the content of lactic acid(LA),neutral detergent fiber(NDF),acid detergent fiber(ADF),lactic acid bacteria,and mold counts in alfalfa silage(P＜0.05).Compared with CK group,the pH value,ammonia nitrogen(NH3-N),NDF and ADF concentrations in T3 and T4 groups were significantly decreased(P＜0.05),while the contents of LA and crude protein(CP)were significantly increased at days 55 and 60(P＜0.05).On the 55th day,the mold count in T4 group was significantly lower than in CK,CK+and T2 groups(P＜0.05).The results showed that alfalfa after storage for 55 days,adding benzoic acid+citric acid+complex bacteria+β-glucanase+xylanase had the best silage effect.关键词
添加剂/贮藏时间/苜蓿/青贮品质/微生物数量Key words
additives/storage time/alfalfa/silage quality/microbial quantity分类
农业科技引用本文复制引用
贾海阔,吴春会,祖晓伟,刘振宇,陈欢,刘震灵,王明亚,李秋凤..不同添加剂和贮藏时间对苜蓿青贮品质和霉菌数量的影响[J].饲料研究,2025,48(1):163-169,7.基金项目
河北省重点研发计划(项目编号:20326608D) （项目编号:20326608D）
河北省现代农业产业技术体系建设专项资金(项目编号:HBCT2023160205) （项目编号:HBCT2023160205）
河北农业大学引进人才科研专项(项目编号:YJ201826) （项目编号:YJ201826）
