›› 2017, Vol. 44 ›› Issue (9): 2638-2643.doi: 10.16431/j.cnki.1671-7236.2017.09.014

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Different Feeding Mode of β-agonists Treatments on Plasma Biochemical Parameters and Internal Hormone Levels in Cattle

LIU Jia1,2, ZHANG Kai2, LONG Rui-jun3, ZHANG Jun-min2, ZHAO Qing-yu2, WANG Hong-liang4, ZHAO Fu-zhong4   

  1. 1. College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730030, China;
    2. Scientific Observing and Experiment Station of Animal Genetic Resource and Nutrition in North China, Ministry of Agriculture, Institution of Animal Science, Chinese Academy of Agricultural Science, Beijing 100193, China;
    3. School of Life Science, Lanzhou University, Lanzhou 730030, China;
    4. Institution of Animal Science, Academy of Land Reclamation Science, Haerbing 150038, China
  • Received:2017-02-28 Online:2017-09-20 Published:2017-09-22

Abstract:

The experiment was aimed to study different feeding mode of β-agonists treatments on plasma parameters and internal hormone levels in cattle. 15 healthy Simontal cattle with similar body weight (257.9 kg±33.3 kg) were randomly divided into three groups. The cattle were fed with the same basal diet, and the test group Ⅰ were daily treated with 670.0 μg/(kg·BW) ractopamine while the test group Ⅱ were daily treated with a mixture of ractopamine, salbutamol and clenbuterol (223.3, 50.0 and 5.3 μg/(kg·BW), respectively) for 28 consecutive days, and the period of withdrawal was 28 days. The results showed that at the 28th day of the treatment,plasma free fatty acid (FFA) concentrations in test groupsⅠwere significantly lower than that in control group (P<0.05), plasma glucose (GLU) and FFA concentrations in test groupsⅡwere significantly lower than that in control group (P<0.05);The levels of hormone in plasma were not significantly affected by β-agonists during the whole test period (P>0.05) except that the INS level in test groupsⅠ was significantly lower than that in control group (P<0.05) at the 28th day of the withdrawal.These results demonstrated that plasma FFA in cattle could be used as potential biomarkers to supervise the illegal use of β-agonists.

Key words: β-agonists; cattle; blood biochemical parameters; hormone levels

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