›› 2018, Vol. 45 ›› Issue (2): 409-414.doi: 10.16431/j.cnki.1671-7236.2018.02.015

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Effects of Different Attractants on Growth Performance,Apparent Nutrient Digestibility and Some Serum Hormones in Angus Calves

CAO Meng1, WANG Yongqiang1, YANG Liang1, ZHANG Wenju1, LI Degui2, LI Jitang2   

  1. 1. College of Animal Science and Technology, Shihezi University, Shihezi 832003, China;
    2. Xinjiang Western Animal Husbandry Co., Ltd., Shihezi 832000, China
  • Received:2017-08-07 Online:2018-02-20 Published:2018-02-10

Abstract:

This experiment was conducted to research the effects of different attractants on growth performance,apparent nutrient digestibility and some serum hormones in Angus calves. In the single factor random grouping test,24 6-month-old Angus calves with the average weight of 165.1 kg±35.5 kg in good body condition were randomly divided into 4 treatments of groups A,B,C and D with 6 duplications per treatment. Group A was control group,fed with standard total mixed ration (TMR). Groups B,C and D was fed with TMR+0.24% green pigment,TMR+1.2 g/d XTRACT® 7065 and TMR+0.4% sodium cyclamate. The premilinary trial lasted for 10 d and trial period was 30 d. The results showed that:Compared with control group,The ADMI of test groups was significantly increased (P < 0.05).All the three tested attractants could promote the apparent nutrient digestibility to varying degrees,and ADF apparent digestibility in group B was significantly higher than that of other two test groups (P < 0.05);NDF apparent digestibility of group B was significantly higher than that of the control group (P < 0.05);There was no significant difference in the levels of serum NPY and serum 5-HT among the groups (P > 0.05).Compared with the control group,the NPY level in groups B and D were higher,but that in group C was lower;The 5-HT level in groups B and D were lower,while that in group C was higher.In conclusion,the addition of green agents,fragrances and sweeteners in the diet could improve the growth performance and apparent nutrient digestibility of calves,green agents and sodium cyclamate could increase the serum NPY level,and XTRACT® 7065 could increase the serum 5-HT level.

Key words: attractant; Angus calves; growth performance; apparent nutrient digestibility; serum hormone

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