家畜生态学报2025，Vol.46Issue(12)：44-49,6.DOI:10.3969/j.issn.1673-1182.2025.12.007
四种能量饲料对肉牛体外产气量和瘤胃发酵特性的影响
Effects of Four Energy Feeds on in vitro Gas Production and Rumen Fermentation Characteristics of Beef Cattle
摘要
Abstract
This experiment was conducted to compare the effects of corn,wheat,barley and rice on in vitro gas production and rumen fermentation characteristics of beef cattle.After a comprehensive analysis of the nutritional components of these grains and their impact on rumen cumulative gas production in vitro and fermentation parameters in vitro,the following results were obtained:the crude protein(CP)content and total energy of the four energy diets ranged from 8.37％to 13.57％and 17.38 MJ/kg to 18.72 MJ/kg,respectively.The CP content of wheat and barley reached 13％,the total energy of corn was the highest,and that of rice was the lowest.Cumulative gas production at 48 h of in vitro fermentation in wheat group and corn group was significantly higher than that in barley group and rice group(P＜0.05).The concen-trations of acetic acid and total volatile fatty acid(TVFA)in corn and barley groups were significantly higher than those in wheat group(P＜0.05).The pH values of the four energy feeds fermented for 48 h in vitro ranged from 6.79 to 6.84,with no significant difference(P＞0.05).The dry matter(DM)degrada-tion rate in maize,wheat and barley groups was significantly higher than that in rice group(P＜0.05).The content of ammonia nitrogen(NH3-N)in wheat group was significantly higher than that in other three groups(P＜0.05).The concentration of microbial protein(MCP)in barley group was significantly higher than that in the other three groups(P＜0.05).In conclusion,the nutritional value and in vitro fer-mentation characteristics of corn,wheat,and barley exhibit similarities.Therefore,given appropriate raw material prices,a certain proportion of wheat and barley can be incorporated in place of corn in beef cattle diets during practical production.关键词
玉米/小麦/大麦/稻谷/肉牛/营养成分/体外发酵Key words
corn/wheat/barley/rice/beef cattle/nutrient composition/in vitro fermentation分类
农业科技引用本文复制引用
刘文昌,夏敏,肖海翔,李靖,张现东,何帮林,李付强,肖正中,肖定福..四种能量饲料对肉牛体外产气量和瘤胃发酵特性的影响[J].家畜生态学报,2025,46(12):44-49,6.基金项目
国家现代农业产业技术体系建设专项资助(CARS-37) （CARS-37）
