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| 柴胡提取物对热应激奶牛营养物质表观消化率和瘤胃发酵参数的影响 |
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侍宝路1,2, 郑楠2, 张养东2, 范彩云1, 张幸开3, 王秀敏4, 秦俊杰4, 张运海1, 程建波1
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| (1.安徽农业大学 动物科技学院, 合肥 230036;2.中国农业科学院 北京畜牧兽医研究所/农业部奶产品质量安全风险评估实验室(北京), 北京 100193;3.上海光明荷斯坦牧业有限公司, 上海 200443;4.北京市中兽药工程技术研究中心, 北京 102206) |
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| 摘要: |
| 为研究添加不同水平的柴胡提取物对热应激条件下泌乳后期荷斯坦奶牛营养物质表观消化率和瘤胃发酵参数的影响,采用随机区组设计,按照产奶量、泌乳天数及胎次相同的原则将48头荷斯坦奶牛随机分为4组,每组12头,各组在基础日粮中分别添加0、0.5、2.5和5.0 g/kg柴胡提取物(干物质基础),试验期9周。结果表明:热应激条件下,柴胡提取物对瘤胃pH,氨氮含量,丙酸、异丁酸、丁酸、异戊酸和戊酸浓度,乙酸/丙酸及营养物质表观消化率均无显著影响(P>0.05);0.5 g/kg组的菌体蛋白含量显著高于2.5和5.0 g/kg添加组(P<0.05),添加5.0 g/kg柴胡提取物降低瘤胃总挥发性脂肪酸(P=0.05)和乙酸浓度(P=0.06),不利于瘤胃发酵。因此,柴胡提取物推荐添加剂量不宜超过5.0 g/kg。 |
| 关键词: 奶牛 柴胡提取物 热应激 表观消化率 瘤胃发酵 |
| DOI：10.11841/j.issn.1007-4333.2015.06.22 |
| 投稿时间：2015-03-18 |
| 基金项目:国家重点基础研究发展计划(2011CB100805); 现代农业产业技术体系专项资金(nycytx-04-01); 安徽省国际科技合作计划项目(1503062019) |
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| Effect ofbupleurum extract on nutrient apparent digestibility and rumen fermentation parameters in heat-stressed Holstein dairy cows |
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SHI Bao-lu1,2, ZHENG Nan2, ZHANG Yang-dong2, FAN Cai-yun1, ZHANG Xing-kai3, WANG Xiu-min4, QIN Jun-jie4, ZHANG Yun-hai1, CHENG Jian-bo1
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| (1.College of Animal Science and Technology, Anhui Agricultural University, Heifei230016, China;2.Institute of Animal Sciences/Ministry of Agriculture-Milk Risk Assessment Laboratory, Chinese Academy of Agricultural Science, Beijing100193, China;3.Shanghai Bright Holstan Co., Ltd., Shanghai 200436, China;4.Beijing Engineering Research Center for Veterinary Drugs, Beijing 102206, China) |
| Abstract: |
| Experiment was conducted to study the effect of bupleurum extract (BE) on nutrient apparent digestibility and rumen fermentation parameters in heat-stressed Holstein dairy cows.Forty-eight cows were randomly assigned to one of four groups (n=12) based on DIM,milk yied and parity.Bupleurum extract was supplied into daily basal diet at 0,0.5,2.5 and 5 g/kg (Dry matter basis).The experiment lasted for 9 weeks in hot summer.The results showed:There were no effects on pH,the content of ammonia nitrogen,acetate/propionate,the concentrations of propionate,isobutyrate,butyrate,isovalerate and valerate,the diet apparent digestibility among different treatments (P>0.05);supplemental BE at 0.5 g/kg increased bacterial protein content (P<0.05) compared with 2.5 or 5 g/kg BE (P<0.05) andsupplemental BE at 5g/kg could decrease the concentrations of acetate and total volatile fatty acids,which reduced rumen fermentation.In conclusion,bupleurum extract recommended the additive dosage of BE should not be more than 5 g/kg. |
| Key words: dairy cows bupleurum extract heat stress apparent digestibility rumen fermentation |
