| 摘要: |
| 为探究奶牛产后体况对产奶量和亚临床酮病(Subclinical ketosis，SCK)的影响，在黑龙江省3个规模化养殖场在奶牛产后10、20 和60 d收集试验数据，根据国内外体况(Body condition score，BCS)标准将奶牛分为低体况组(L-BCS group，BCS≤3.00)、中BCS组(M-BCS group，3.25≤BCS≤3.50)和高BCS组(H-BCS group，BCS≥3.75)，并进行了日产奶量统计及β-羟基丁酸测定。结果表明:1)不同体况对产奶量有较大的影响，10~20 d低、中BCS组与产奶量差异的相关性极显著(P<0.01)；2)低BCS组和高BCS组与中BCS相比SCK患病风险增加2~6倍，差异极显著(P<0.01)，且低BCS和高BCS为危险因素。综上，不同体况对奶牛的产奶量以及SCK会产生不同影响，奶牛产后BCS处在3.25~3.50，其产奶性能更好，SCK发病率更低。 |
| 关键词: 奶牛 产后体况 产奶量 亚临床酮病 |
| DOI：10.11841/j.issn.1007-4333.2021.03.07 |
| 投稿时间：2020-06-07 |
| 基金项目:标准化养殖产业扶贫示范项目(ZY17C08) |
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| Impacts of postpartum body conditions of dairy cows on milk production and subclinical ketosis |
|
CAO Hao,SONG Yuxi,BAI Yunlong,LIU Zhe,XIA Cheng,XU Chuang
|
| (College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163319, China) |
| Abstract: |
| In order to explore the impact of cow body condition on milk production and subclinical ketosis, the experimental data was collected at 3 large-scale breeding farms in Heilongjiang Province at 10, 20 and 60 days after delivery of dairy cows. According to the domestic and foreign body condition scorer(BCS)standards, cows were divided into low BCS group(BCS≤3. 00), medium BCS group(3. 25≤BCS≤3. 50)and high BCS group(BCS≥3. 75). Then daily milk production statistics and β-hydroxybutyric acid(BHBA)determination were carried out. The results showed that: 1)Different body conditions had a greater impact on milk production. During 10-20 d, it displayed a very significant(P<0. 01)correlation with milk production in both low and medium BCS groups. 2)The risk of SCK in low and high BCS groups was 2 to 6 times higher than that in medium BCS group(P<0. 01). In conclusion, different body conditions had different effects on milk yield and SCK of cows. When BCS of postpartum cows were 3. 25-3. 50, their milk performance was better and the SCK incidence rate was lower. |
| Key words: dairy cow body condition milk production subclinical ketosis |
