不同诱食剂对安格斯犊牛生长性能、养分表观消化率及部分血清激素的影响

doi:10.16431/j.cnki.1671-7236.2018.02.015

摘要/Abstract

摘要：

试验旨在研究日粮中添加不同诱食剂对安格斯犊牛生长性能、养分表观消化率及部分血清激素的影响。采用单因子随机区组设计，选用平均体重165.1 kg±35.5 kg、约6月龄的健康安格斯肉犊牛24头，随机分为A、B、C、D 4组，每组6个重复。A组为对照组，饲喂全混合日粮（TMR）；B、C、D组分别饲喂TMR+0.24%绿色素、TMR+1.2 g/d XTRACT^® 7065（香味剂）、TMR+0.4%甜蜜素。预饲期10 d，正饲期30 d。结果显示，与对照组相比，B、C、D组平均干物质采食量（ADMI）均显著提高（P < 0.05）。各诱食剂均能提高犊牛营养物质表观消化率，但各诱食剂的影响程度不同，其中B组酸性洗涤纤维（ADF）表观消化率显著高于其他诱食剂组（P < 0.05），B组中性洗涤纤维（NDF）表观消化率显著高于对照组（P < 0.05）。在试验第31天采食后1 h，各组间神经肽Y（NPY）和5-羟色胺（5-HT）含量差异均不显著（P > 0.05），B、D组NPY含量高于对照组，C组则低于对照组，B、D组5-HT含量均低于对照组，而C组则高于对照组。综合考虑，日粮中添加绿色剂、香味剂及甜味剂均可在一定程度上提高犊牛生长性能及营养物质消化率；绿色剂和甜味剂可以提高犊牛血清中NPY含量，而香味剂则使犊牛血清中5-HT含量升高。

关键词: 诱食剂; 安格斯犊牛; 生长性能; 养分表观消化率; 血清激素

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

中图分类号:

S816.7

曹梦, 王永强, 杨亮, 张文举, 李德贵, 李吉堂. 不同诱食剂对安格斯犊牛生长性能、养分表观消化率及部分血清激素的影响[J]. 《中国畜牧兽医》, 2018, 45(2): 409-414.

CAO Meng, WANG Yongqiang, YANG Liang, ZHANG Wenju, LI Degui, LI Jitang. Effects of Different Attractants on Growth Performance,Apparent Nutrient Digestibility and Some Serum Hormones in Angus Calves[J]. , 2018, 45(2): 409-414.

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