CAJ | 학술논문

试验选取48头(平均DIM为(99±58.56)d)中国荷斯坦奶牛,随机分为4组,每组12头.分别饲喂在基础日粮中添加0%(对照组)、11.2%(DDGS10)、21.3%(DDGS20)、29%(DDGS30)的DDGS试验日粮,配制成等氮日粮(粗蛋白15.15%),日粮精粗比例为55:45.旨在评价利用不同比例的DDGS替代日粮中的豆粕和玉米对泌乳奶牛生产性能的影响.结果表明,日粮中添加不同比例的DDGS对各处理组的干物质采食量(DMI)影响差异不显著.随着DDGS添加比例的提高产奶量有先升高后降低的趋势,以DDGS20组的产奶量最高(P>0.05).乳中脂肪百分含量和绝对含量都差异不显著(P>0.05).牛乳中蛋白质的百分含量随着DDGS含量的增加有逐渐降低的趋势且差异极显著(P<0.01),而蛋白质绝对产量差异并不显著(P>0.05).结果分析表明,在奶牛日粮中添加20%左右比例的DDGS基本不影响奶牛的生产性能,同时使奶牛养殖者获得最大的经济效益.
시험선취48두(평균DIM위(99±58.56)d)중국하사탄내우,수궤분위4조,매조12두.분별사위재기출일량중첨가0%(대조조)、11.2%(DDGS10)、21.3%(DDGS20)、29%(DDGS30)적DDGS시험일량,배제성등담일량(조단백15.15%),일량정조비례위55:45.지재평개이용불동비례적DDGS체대일량중적두박화옥미대비유내우생산성능적영향.결과표명,일량중첨가불동비례적DDGS대각처리조적간물질채식량(DMI)영향차이불현저.수착DDGS첨가비례적제고산내량유선승고후강저적추세,이DDGS20조적산내량최고(P>0.05).유중지방백분함량화절대함량도차이불현저(P>0.05).우유중단백질적백분함량수착DDGS함량적증가유축점강저적추세차차이겁현저(P<0.01),이단백질절대산량차이병불현저(P>0.05).결과분석표명,재내우일량중첨가20%좌우비례적DDGS기본불영향내우적생산성능,동시사내우양식자획득최대적경제효익.
In order to evaluate the effects of different doses of dried distillers grains with solubles (DDGS) on the lactational performance of Chinese Holstein cows, 48 multiparous Chinese Holstein cows (DIM (99?58.56) d) were randomly assigned to four treatments. Cows were fed total mixed diets containing 16.9% soybean meal (control), 9.5% soybean meal and 11.2% DDGS (DDGS10), 3.9% soybean meal and 21.3% DDGS (DDGS20), or 29% DDGS (DDGS30) as the major protein source. All diets had a 45:55 forage-to-concentrate ratio, and were formulated to be isonitrogenous at 15.15% CP. The results showed that dry matter intake did not differ. Milk yield tended to increase linearly when DDGS replaced soybean meal and corn when the percentage of DDGS reached 20% DM, in all treatment DDGS20 was the highest. There were no significant differences on the percentage of milk fat and milk fat yield. Milk protein percentage showed very significant difference (P<0.01), with a gradual decrement trend the milk protein yield was not different (P>0.05). Results of this study showed that maximum economic payback could be obtained when the dairy ration was formulated to contain about 20% DDGS(DM basis).