| 热应激对泌乳盛期奶牛的采食量和消化率的影响 |
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| 引用本文： | 陈 军,王思珍,姜倩倩,等.热应激对泌乳盛期奶牛的采食量和消化率的影响[J].中国牛业科学,2014(2):1-4. |
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| 作者姓名： | 陈 军 王思珍 姜倩倩 等 |
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| 作者单位： | [1]海拉尔农垦（集团）有限责任公司三河种马场,内蒙古呼伦贝尔021008 [2]内蒙古民族大学动物科学技术学院,内蒙古通辽028000 [3]海拉尔农垦（集团）有限责任公司,内蒙古呼伦贝尔021008 |
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| 基金项目： | 国家自然科学基金（31160474） |
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| 摘 要： | 目的]探讨热应激对奶牛采食量和饲料中营养物质消化率的影响。方法]通过采用单因子水平随机设计。结果]奶牛热应激时采食量显著下降,在轻微和中度热应激期采食量分别下降3.65%和13.46%;营养物质的消化率也显著下降(P0.05),奶牛在轻度和中度热应激期粗脂肪的消化率分别降低了6.17%、13.03%;钙的消化率分别降低了25.09%、34.97%;磷的消化率分别降低了22.77%、36.27%。结论]奶牛热应激时采食量显著下降(P0.05);饲料中营养物质消化率粗脂肪、钙、磷的消化率与非热应激期相比,差异显著(P0.05)。
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| 关 键 词： | 热应激 泌乳盛期 采食量 消化率 |
Effects of Heat Stress on Feed Intake and Feed Digestibility of Nutrients in Peak Lactating Cows |
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| CHEN Jun,WANG Si-zhen,JIANG Qian-qian,CHENG Yan-bin.Effects of Heat Stress on Feed Intake and Feed Digestibility of Nutrients in Peak Lactating Cows[J].China Cattle Science,2014(2):1-4. |
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| Authors: | CHEN Jun WANG Si-zhen JIANG Qian-qian CHENG Yan-bin |
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| Institution: | 1. Sanhe horse farm of Hailar farms (Group) Co. Ltd. , Hulun Buir , Inner Mongolia, 021008 2. College of Animal Science and Technology, Inner Mongolia University for Nationalities, Tongliao, Inner mongolia 028000 3. Hailar farms (Group) Co. ,Ltd. , Hulun Buir, Inner Mongolia 021008) |
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| Abstract: | Objective]To explore the effects of heat stress on feed intake and feed nutrient digestibility in dairy cows. Method]Using single factor randomized design. Result]Intake of dairy cows decreased significantly in heat stress period,and intake of dairy cow decreased by 3.65% and 13.46% in the mild and moderate heat stress period, respectively. At the same time, feed digestibility of nutrients also decreased significantly （P〈0.05）, and crude fat digestibility of dairy cows decreased 6.17%, 13.03% in mild and moderate heat stress period,respectively; the digestibility of Ca decreased by 25.09% ,34.97% ,respectively. phosphorus digestibility of dairy cows decreased 22.77% and 36.27%, respectively. Conclusion]Heat stress significantly decreased intake decreased of dairy cows （P〈0.05）, while digestibility of some nutrients （including crude fat, calcium,phosphorus） showed significant differences when compared with those in non-heat strein non-heat stress period（P〈0. 05）. |
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| Keywords: | heast stress peak lactation feed intake digestibility |
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