›› 2015, Vol. 42 ›› Issue (7): 1705-1710.doi: 10.16431/j.cnki.1671-7236.2015.07.013

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Effect of Different Dietary Nutrition Levels on Fattening Effect of Holstein Bulls

LI Xiao-meng1, LI Qiu-feng1, CAO Yu-feng1, YU Chun-qi2, LI Jian-guo1, GAO Yan-xia1   

  1. 1. College of Animal Science and Technology, Agricultural University of Hebei, Baoding 071001, China;
    2. Fucheng Wufeng Food Limited Company, Sanhe 065200, China
  • Received:2014-12-24 Online:2015-07-20 Published:2015-07-23

Abstract: This experiment was conducted to study the effect of different dietary nutrition levels on fattening effect of Holstein bulls.48 4-month-old Holstein bulls with an average body weight of 128 kg were allocated into two groups,group Ⅰ was fed a low nutrition level diet,group Ⅱ was fed a high nutrition level diet.Each group had 24 Holstein bulls.The pre-test period lasted for 7 days and the trial period lasted for 245 days.The results showed that compared with group Ⅰ,the ADG in group Ⅱ was significantly increased by 6.36% (P<0.01),while the F/G in group Ⅱ was decreased by 6.55%.With the increasing of dietary nutrition levels,the apparent digestibility of CP,EE,NDF,ADF,Ca and P were rising,but there was no significant differences between two groups (P>0.05).Compared with group Ⅰ,the serum GLU,AST,ALT and GH contents in group Ⅱ were increased by 12.52%,12.85%,9.68% and 13.24% (P<0.05),respectively,while the serum BUN content in group Ⅱ was decreased by 10.98% (P<0.05).Compared with group Ⅰ,the feeding profits of group Ⅱ increased by 1.37 yuan/(head·day),the total economic benefit of group Ⅱ increased by 335.65 yuan/head.In conclusion,the improvement of dietary nutrition levels could improve the fattening performance and the economic benefit of Holstein bulls.

Key words: nutrition levels; Holstein bulls; fattening; nutrient apparent digestibility; blood biochemical indices

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