畜牧兽医学报 ›› 2012, Vol. 43 ›› Issue (8): 1239-1246.

• 动物营养 • 上一篇    下一篇

日粮阴阳离子平衡(DCAB)对热应激肉牛生产性能的影响

曹玉凤1,2,3,李秋凤1,2,3,高艳霞1,2,3,于海川4,李建国1,2,3,冯志华1, 陈福音1崔秋佳1,赵会利1,王美美1

  

  1. 1.河北农业大学动物科技学院,保定 071001; 2.河北省牛羊胚胎工程技术研究中心,保定 071001; 3.河北农业大学养牛科学研究所,保定 071001; 4.河北省隆化县农牧局,承德 068150
  • 收稿日期:2011-07-21 修回日期:1900-01-01 出版日期:2012-08-24 发布日期:2012-08-24

Effects of Dietary Cationanion Balance on Performance of Heatstressed Beef Cattle

CAO Yufeng 1,2,3, LI Qiufeng 1,2,3, GAO Yanxia 1,2,3, YU Haichuan 4, LI Jian guo 1,2,3, FENG Zhihua 1, CHEN Fuyin 1, CUI Qiujia 1, ZHAO Huili 1, WANG Meimei 1

  

  1. 1. College of Animal Science and Technology,Agricultural University of HeBei, Baoding 071001, China; 2. Research Center of Embryo Engineering Technology in Cattle and Sheep of Hebei, Baoding 071001,China; 3.Cattle Research Institute, Agricultural University of Hebei, Baoding 071001, China; 4. Agriculture and Animal Husbandry of Longhua County in Hebei Province, Chengde 068150, China
  • Received:2011-07-21 Revised:1900-01-01 Online:2012-08-24 Published:2012-08-24

摘要: 为了研究日粮中不同DCAB对热应激肉牛生产性能、各种生理指标以及外周血淋巴细胞凋亡的影响,选择30头体质量(450±10)kg的西门塔尔牛杂交牛,随机分为3组,每组10头,各组试验日粮分别为Ⅰ组对照组(DCAB为108 meq·kg-1 DM)、Ⅱ组(228 meq·kg-1 DM)、Ⅲ组(347 meq·kg-1 DM)。试验结果表明,日粮中DCAB对热应激肉牛的直肠温度无显著影响,随DCAB的增加线性降低肉牛的呼吸频率(P<0.05)。肉牛日增体质量随DCAB的增加而逐渐增加,其中Ⅱ和Ⅲ组分别比对照组提高29%(P<0.05)和25%(P<0.05),料重比分别降低了17.34%(P<0.05)和11.46%(P>0.05),日粮NDF和ADF的表观消化率有增加的趋势,Ca、灰分表观消化率呈现二次变化,蛋白质和脂肪的表观消化率无显著变化。与对照组相比,Ⅱ和Ⅲ组血清T4水平分别增加58.1% (P<0.05)和31.9% (P>0.05),SOD水平分别增加18.98%(P>0.05)和48.18%(P>0.05)。日粮中增加DCAB值对血清中血糖、尿素氮、白蛋白等无显著影响。增加DCAB可以显著降低热应激肉牛外周血淋巴细胞早期凋亡率(P<0.01)、晚期凋亡率(P<0.01)和总凋亡率(P<0.01),降低淋巴细胞的比例(P<0.05),提高肉牛抵抗热应激的能力。综合各项指标,在热应激条件下,日粮中适宜的DCAB值为228 meq·kg-1DM。

关键词: 肉牛, 热应激, 离子平衡, 生产性能, 细胞凋亡

Abstract: The objective of this trial was to study the effects of different DCAB on the production performance, blood chemistry and lymphocyte apoptosis of heatstressed beef cattle. 30 Simmental cattle with similar weight( (450±10)kg) were randomly divided into three groups,every group contains ten cattle. The diets of three experimental groups was group Ⅰ(control group, DCAB, 108 meq·kg-1 DM), group Ⅱ(228 meq·kg-1 DM ), group Ⅲ(347 meq·kg-1 DM). The results showed that, under the condition of heat stress, different DCAB value in diet didn’t influence rectal temperature, while the respiratory rate decreased linearly with increasing DCAB (P<0.05) . Compared with control group, daily weight gain of beef cattle in group Ⅱ and Ⅲ increased 29% (P<0.05) and 25% (P<0.05), respectively, feed conversion(feed/gain)decreased by 17.34% (P<0.05) and 11.46% (P>0.05), respectively. With the increasing DCAB, dietary NDF and ADF apparent digestibility improved (P>0.05), Ca, ash apparent digestibility showed quadratic change, crude protein and crude fat apparent digestibility had no significant difference. Compared with the control group, serum T4 levels of groupⅡ and group Ⅲ were increased 58.1% (P<0.05) and 31.9% (P>0.05), respectively, SOD levels increased 18.98% (P>0.05) and 48.18% (P>0.05 ), respectively. Increasing DCAB had no significant effect on serum glucose and urea nitrogen, albumin. Increased DCAB could significantly reduce lymphocytes early apoptosis (P<0.01), late apoptosis (P<0.01) and total apoptosis rate (P<0.01), reduce the proportion of lymphocytes (P<0.05) in peripheral blood of beef cattle, and improve the ability to resist heat stress. In conclusion, the suitable level of DCAB was 228 meq·kg-1 DM in diet of heatstressed beef cattle.

Key words: beef cattle, heat stress, cationanion balance, production performance, apoptosis