玉米秸秆与紫花苜蓿混合青贮对肉牛生长性能、养分消化率和经济效益的影响  

Mixed silage of corn stover and alfalfa on the growth performance,nutrient digestibility and the impact of economic benefits

作　　者：张婷婷[1] 申玉建 ZHANG Tingting;SHEN Yujian(Chongqing Finance and Economics Vocational College,Chongqing 402160,China;Southwest University,Chongqing 400715,China)

机构地区：[1]重庆财经职业学院,重庆402160 [2]西南大学,重庆400715

出　　处：《中国饲料》2025年第2期105-108,共4页China Feed

摘　　要：为探究玉米秸秆与紫花苜蓿混合青贮对肉牛生长性能、养分消化率和经济效益的影响,试验选用60头体重相似且健康状况良好的西门塔尔肉牛作为试验对象,并将它们随机划分为4个试验组,每组5个重复,每个重复3头肉牛。其中,对照组肉牛饲喂单纯的玉米秸秆青贮,3个试验组分别为试验Ⅰ组(65%玉米秸秆+35%紫花苜蓿)、试验Ⅱ组(50%玉米秸秆+50%紫花苜蓿)、试验Ⅲ组(35%玉米秸秆+65%紫花苜蓿),预试验14 d,正式试验90 d。结果表明:(1)与对照组相比,试验组Ⅰ和Ⅱ肉牛的平均日增重(ADG)显著提高(P <0.05),而Ⅲ组差异不显著(P> 0.05)。试验Ⅰ组的日均采食量(ADFI)显著高于对照组(P <0.05)。试验Ⅰ和Ⅱ组的料重比(F/G)比对照组显著降低(P <0.05),其中试验Ⅱ组的F/G值最低。(2)试验Ⅰ、Ⅱ和Ⅲ组对干物质(DM)、粗蛋白质(CP)和酸性洗涤纤维(ADF)的表观消化率显著高于对照组(P <0.05)。(3)经济效益分析,试验Ⅰ和Ⅱ组的增重收益显著高于对照组(P <0.05)试验Ⅱ组经济效益最高。综合各项指标看,将50%玉米秸秆与50%紫花苜蓿混合青贮后饲养肉牛效果最好。This investigation aimed to assess the influence of corn straw and alfalfa mixed silage on the beef cattle's growth rates,nutrient absorption capability,and economic returns.For this purpose,60 Simmental beef cattle,selected for their comparable weights and robust health,were randomly assigned into four distinct experimental groups.In the control group,beef cattle were provided with plain corn straw silage,while the experimental groups were classified into three:groupⅠof the test(65%corn straw silage and 35%alfalfa),groupⅡ(an even blend of 50%corn straw silage and 50%alfalfa),and groupⅢ(composed of 35%corn straw silage and 65%alfalfa).Each group included five replicates,with three cattle per replicate.The experiment encompassed a 14-day adaptation period followed by a 90-day official trial phase.The results showed that:(1)GroupsⅠandⅡcattle had higher daily weight gain(P<0.05)than the control group,while GroupⅢshowed no difference.GroupⅠate more feed than the control(P<0.05).Both GroupsⅠandⅡhad worse feed-to-gain ratios than the control(P<0.05),with GroupⅡbeing the best among the test groups.(2)GroupsⅠ,Ⅱ,andⅢshowed improved digestibility of Dry Matter,Crude Protein,and Acid Detergent Fiber compared to the control group(P<0.05).(3)Test GroupsⅠandⅡhad higher weight gain income and economic benefits than the control group(P<0.05),with GroupⅡhaving the highest benefits.The best feeding effect was achieved with a 50%-50%mix of corn straw and alfalfa.

关 键 词：玉米秸秆 紫花苜蓿 肉牛 生长性能 养分消化率 经济效益 

分 类 号：S816.5[农业科学—饲料科学]