CAJ | 학술논문

试验选择8头肉用牛,设计2个不同蛋白质补充料来源精料的日粮,即以DDGS为主的试验组和以棉籽粕为主的对照组,粗饲料为玉米芯,采用全收粪的消化试验测定日粮营养物质表观消化率。结果表明,不同蛋白质来源的试验组和对照组日粮有机物、粗蛋白质、中性洗涤纤维、酸性洗涤纤维的表观消化率没有差异（P〉0.05）,肉牛日粮有机物、粗蛋白质、中性洗涤纤维、酸性洗涤纤维的表观消化率的变化范围分别为65%～71%、60%～70%、68%～70%和63%～65%。
시험선택8두육용우,설계2개불동단백질보충료래원정료적일량,즉이DDGS위주적시험조화이면자박위주적대조조,조사료위옥미심,채용전수분적소화시험측정일량영양물질표관소화솔。결과표명,불동단백질래원적시험조화대조조일량유궤물、조단백질、중성세조섬유、산성세조섬유적표관소화솔몰유차이（P〉0.05）,육우일량유궤물、조단백질、중성세조섬유、산성세조섬유적표관소화솔적변화범위분별위65%～71%、60%～70%、68%～70%화63%～65%。
Eight beef cattles were divided into two groups,and they were fed with the dietary containing concentrate and corn cobs. The concentrate contained different protein source,among them DDGS was tested group and cottonseed meal was control group. The apparent digestibility of dietary nutrients was determined through digestion test by total feces collection method. Results showed that apparent digestibilities in total tract of organic matter,crude protein,neutral and acid detergent fiber were unaffected by protein sources significantly. The variation ranges of apparent digestibilities of organic matter,crude protein,neutral and acid detergent fiber in beef cattle ration were 65%～71%,60%～70%,68%～70% and 63%～65%,respectively.