不同蛋白质源组合代乳品对荷斯坦公犊生长性能、营养物质表观消化率和屠宰性能的影响Effects of Different Protein Source Combination Milk Replacers on Growth Performance,Nutrient Apparent Digestibility and Slaughter Performance of Holstein Calves
杨磊;刘云龙;屠焰;马延鑫;付彤;毕研亮;刁其玉;成述儒;
摘要(Abstract):
本试验旨在研究不同蛋白质源组合代乳品对荷斯坦公犊生长性能、营养物质表观消化率和屠宰性能的影响。将64头新生荷斯坦公犊随机分为4组,每组16头,分别饲喂4种不同蛋白质源组合代乳品,代乳品蛋白质源主要为乳源蛋白(MP)、大豆分离蛋白(SPI)、大米分离蛋白(RPI)、小麦水解蛋白(WPH)。各组代乳品中蛋白质源组合如下:A组,30%MP+70%SPI;B组,30%MP+40%SPI+20%RPI+10%WPH;C组,30%MP+10%SPI+20%RPI+40%WPH;D组,30%MP+10%SPI+40%RPI+20%WPH。试验期63 d。犊牛于7、28、56日龄晨饲前进行体重及体尺指标测量,在28~34日龄及57~63日龄进行2期消化代谢试验,64日龄时进行屠宰试验。结果显示:1)28日龄时,各组之间体重和体尺指标差异均不显著(P>0.05);56日龄时,B组犊牛体重、十字部高、腹围显著高于A组(P<0.05);29~42日龄时,B组饲料转化率显著优于A组(P<0.05)。2)28日龄时,A组粗蛋白质表观消化率显著高于C和D组(P<0.05);56日龄时,A组粗蛋白质表观消化率有显著高于B组的趋势(P=0.065);干物质、粗蛋白质表观消化率随日龄的增加而升高。3)各组犊牛屠宰率及器官指数无显著差异(P>0.05)。综上所述,在本试验条件下,30%MP+40%SPI+20%RPI+10%WPH组合代乳品(总蛋白质中,球蛋白、谷蛋白、清蛋白、醇溶蛋白的比例分别为34%、18%、9%、4%)相较于其他蛋白质源组合代乳品可使犊牛获得更好的生长性能。
关键词(KeyWords): 犊牛;蛋白质源组合;代乳品;生长性能;营养物质表观消化率;屠宰性能
基金项目(Foundation): 奶牛产业技术体系北京市创新团队(BAIC06-2019);; 中国农业科学院科技创新工程(CAAS-ASTIP-2017-FRI-04);中国农业科学院基本科研业务费专项“基于双蛋白应用的犊牛羔羊配方代乳品关键技术开发与应用”(Y2018YJ08-3)
作者(Author): 杨磊;刘云龙;屠焰;马延鑫;付彤;毕研亮;刁其玉;成述儒;
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