摘要
应用体外发酵产气技术,研究了青贮玉米以不同比例(0%～100%)替代复合稻草块中稻草对其体外发酵特性的影响。结果表明:随着青贮玉米比例的升高,复合稻草块的24h产气量、产气速度常数、有机物消化率、代谢能呈逐渐上升的趋势(P<0.05)。替代比例低于40%时24h产气量组合效应不显著(P>0.05),替代比例高于40%后出现逐渐增大的正组合效应,当替代比例为50%时,正组合效应值(9.68)显著增加(P<0.05),以后变动幅度不大。综上可见,用青贮玉米替代复合稻草块中40%以上的稻草较为适宜,当替代比例为50%时,就可获得较好的消化率。
In vitro gas test was applied to investigate the effect of substituting corn silage for rice straw in compound rice straw-based blocks （0%-100%） on in vitro gas production （GP） characteristica The results showed that, When propor-tion of corn silage was increased, the 24h GP, rate constant of GP, estimated organic matter digestibility and metabolizable energy of compound rice straw-based blocks were elevated gradually （P 〈 0.05）. When substituting proportion was lower than 40%, no associative effects was observed （P 〉 0.05）. However, positive associative effects was observed （P 〈 0.05） when substituting proportion was higher than 40%. Associative effect （9.68） was significantly increased （P 〈 0.05） at substituting proportion of 50%, and then levelled off. It was suggested that appropriate proportion of corn silage to substitute for rice straw in compound blocks was more than 40%. Preferable nutrition utilization efficiency could be obtained, when substituting proportion was 50%.
出处
《中国畜牧杂志》
CAS
北大核心
2007年第15期39-41,共3页
Chinese Journal of Animal Science
基金
浙江省重大科技攻关(011102193)
国家科技部农业科技成果转化(04EFN213300117)
关键词
复合稻草块
体外产气法
组合效应
青贮玉米
compound rice straw-based blocks
in vitro gas technique
association effects
corn silage
