›› 2015, Vol. 42 ›› Issue (5): 1137-1144.doi: 10.16431/j.cnki.1671-7236.2015.05.016

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Effects of Feeding Different Dietary Crude Protein and Digestible Energy to Yili Mares during Late Lactation Stage on Growth Development and Blood Biochemical Parameters of Foals

WANG Xian-dong1, DENG Hai-feng2, LI Hai3, JIN Wei-xing1, ZHANG Hao4, MA Yu-hui3, CHEN Yong1   

  1. 1. College of Animal Sciences, Xinjiang Agricultural University, Urumqi 830052, China;
    2. Zhaosu Racecourse of Yili Kazak Autonomous Prefecture, Zhaosu 835500, China;
    3. Animal Husbandry and Veterinary Bureau of Zhaosu County, Yili Kazak Autonomous Prefecture, Zhaosu 835600, China;
    4. Department of Animal Science, Yili Vocational and Technical College, Yining 835000, China
  • Received:2014-10-14 Online:2015-05-20 Published:2015-06-02

Abstract: In this paper, thirty Yili mares aged 11 to 12 years with weighing 410 kg ± 30 kg, parity of 4 to 5 in third lactation month were selected, and were randomly divided into six groups, each group with five repeats.Two factors quadratic regression orthogonal rotational combination design was adopted to evaluate the effects of feeding different dietary CP and DE to mares on growth development and blood biochemical parameters of foals.Daily DE and CP feeding levels of the 6 groups were 92 MJ/d and 1.20 kg/d, 125 MJ/d and 1.20 kg/d, 92 MJ/d and 1.55 kg/d, 107 MJ/d and 1.35 kg/d, 125 MJ/d and 1.44 kg/d, 115 MJ/d and 1.55 kg/d, respectively.The results showed that body weight, body height, chest circumference and cannon circumference of foals of four and five months were not significant affected by maternal protein and energy intake (P>0.05).As compared with ration contained high DE (125 MJ/d) and low CP (1.20 kg/d), feeding with ration contained moderate DE (107 MJ/d) and CP (1.35 kg/d) improved body length of foals of four and five months significantly (P<0.05).From the blood biochemical parameters, such as total protein, albumin, triglyceride, high-density lipoprotein cholesterol, low density lipoprotein cholesterol, urea nitrogen, creatinine, alanine aminotransferase, there were no significant differences among all groups (P>0.05).Mares fed with ration contained moderate DE (107 MJ/d) and CP (1.35 kg/d) obviously improved the aspartate aminotransferase and uric acid level.In summary, Yili mares during lactation late stage fed with 1.35 kg/d CP and 107 MJ/d DE daily could significantly improve body length development of foals, and foals nitrogen metabolism was altered by maternal dietary nutrition through increasing blood aspartate aminotransferase activity.

Key words: Yili mares; crude protein; digestible energy; blood biochemical parameters; foals

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