日粮中DDGS替代玉米对犏雌牛产奶量、乳品质及瘤胃发酵的影响  

The effect of replacing corn with DDGS in the diet on milk production,milk quality,and rumen fermentation of female cattle

作　　者：张振环 李思源 ZHANG Zhenhuan;LI Siyuan(Wuhe Animal Husbandry and Veterinary Workstation,Jingyuan County Animal Husbandry and Veterinary Technical Service Center,Jingyuan,Gansu Province 730600,China;Animal Husbandry and Veterinary Station of Qinchuan Town,Lanzhou New District,Lanzhou,Gansu Province 730000,China)

机构地区：[1]靖远县畜牧兽医技术服务中心五合畜牧兽医工作站,甘肃靖远730600 [2]兰州新区秦川镇畜牧兽医站,甘肃兰州730000

出　　处：《中国饲料》2024年第4期121-124,共4页China Feed

摘　　要：文章旨在研究日粮中DDGS替代玉米对犏雌牛产奶量、乳品质及瘤胃发酵的影响。试验选取60头胎次相同、产奶量和泌乳天数相近的犏雌牛,随机分为3组,每组20头。其中对照组参考《犏牛养殖技术规程》(DB62/T 2550-2022)配制精饲料,其余2组分别采用30%、60%DDGS替代精饲料中的玉米。试验为期40 d,期间3组犏雌牛均采用舍饲,自由饮水,自由采食粗饲料。结果表明:(1)在相同试验天数条件下,第1、10天各组犏雌牛平均日产奶量均无显著差异(P>0.05),第20、30、40天30%DDGS组犏雌牛平均日产奶量显著高于对照组和60%DDGS组(P<0.05)。(2)与对照组相比,30%DDGS组乳糖率显著提高8.60%(P<0.05),乳蛋白率显著提高5.90%(P<0.05),总固形物显著提高6.12%(P<0.05)。(3)与对照组相比,30%DDGS组、60%DDGS组氨态氮、乙酸浓度及乙丙比均显著提高(P<0.05),丙酸浓度显著降低(P<0.05)。结论:采用30%DDGS替代精饲料中的玉米能提高犏雌牛的产奶量,并且起到改善乳品质和瘤胃发酵的效果。The aim of this experiment is to investigate the effect of replacing corn with DDGS in the diet on milk production,milk quality,and rumen fermentation in female cattle.Select 60 female cattle with the same gestational frequency,similar milk production and lactation days,and randomly divide them into 3 groups,with 20 cows in each group.The control group referred to the“Technical Regulations for Cattle Breeding”(DB62/T 2550-2022)to prepare refined feed,while the other two groups used 30%and 60%DDGS to replace corn in the refined feed.The experiment lasted for 40 days,during which all three groups of female cattle were fed in captivity,freely drinking water,and freely consuming coarse feed.The results showed that:(1)Under the same experimental conditions,there was no significant difference in the average daily milk production of female cattle in each group on the 1st and 10th days(P>0.05).The average daily milk production of female cattle in the 30%DDGS group on the 20th,30th,and 40th days was significantly higher than that of the control group and the 60%DDGS group(P<0.05).(2)Compared with the control group,the 30%DDGS group significantly increased lactose rate by 8.60%(P<0.05),lactoprotein rate by 5.90%(P<0.05),and total solids by 6.12%(P<0.05).(3)Compared with the control group,the concentration of ammonia nitrogen,acetic acid,propionic acid,and the ratio of acetic acid to propionic acid in the 30%DDGS group and 60%DDGS group were significantly increased(P<0.05),while the concentration of propionic acid was significantly reduced(P<0.05).Conclusion:Using 30%DDGS instead of corn in concentrate feed can increase the milk production of female cattle and improve milk quality and rumen fermentation.

关 键 词：DDGS 玉米 犏雌牛 产奶量 乳品质 瘤胃发酵 

分 类 号：S823[农业科学—畜牧学]