《中国畜牧兽医》 ›› 2017, Vol. 44 ›› Issue (12): 3530-3535.doi: 10.16431/j.cnki.1671-7236.2017.12.020

• 动物营养与饲料科学 • 上一篇    下一篇

谷草与苜蓿的不同配比对绵羊日粮组合效应的影响

刘绘汇1, 袁玖1, 平丽莹1, 朱宝珍1, 王军军1, 赵鹏飞1, 何天乐1, 俞海山1, 万欣杰2   

  1. 1. 甘肃农业大学动物科学技术学院, 兰州 730070;
    2. 兰州联邦饲料有限公司, 兰州 730060
  • 收稿日期:2017-04-28 出版日期:2017-12-20 发布日期:2017-12-20
  • 通讯作者: 袁玖 E-mail:511370041@qq.com
  • 作者简介:刘绘汇(1992-),女,甘肃酒泉人,本科,研究方向:粗饲料资源开发,E-mail:1181148654@qq.com
  • 基金资助:

    甘肃农业大学学生科研训练计划(SRTP)重点项目(20170464)

Effect of Different Alfalfa and Rice Straw Proportion on Associative Effects of Sheep's Diets

LIU Hui-hui1, YUAN Jiu1, PING Li-ying1, ZHU Bao-zhen1, WANG Jun-jun1, ZHAO Peng-fei1, HE Tian-le1, YU Hai-shan1, WAN Xin-jie2   

  1. 1. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
    2. Lanzhou Federal Feed Limited Company, Lanzhou 730060, China
  • Received:2017-04-28 Online:2017-12-20 Published:2017-12-20

摘要:

为了探讨不同精粗比下谷草与苜蓿配比对绵羊日粮组合效应的影响,本试验以谷草与苜蓿为粗饲料,采用体外产气法测定精粗比为40:60时,谷草:苜蓿为60:0、50:10、40:20、30:30、20:40、10:50及0:60,精粗比为30:70时,谷草:苜蓿为70:0、60:10、50:20、40:30、30:40、20:50、10:60及0:70的15组日粮及谷草、苜蓿和精料补充料分别培养2、4、6、9、12、24、36、48、72、96 h的产气量(GP),并通过24 h产气量(GP24 h)及其加权估算值计算出各日粮的组合效应值(AE)。结果表明:①精粗比为40:60时,比较各组GP24 h,50:10组极显著大于10:50组(P<0.01);40:20、60:10组显著大于10:50组(P<0.05);各组AE值均为正值,但组间无显著差异(P>0.05);50:10的GP24 h、b、a+b均为最大,其AE最优。②精粗比为30:70时,比较各组GP24 h,50:20、60:10、70:0组显著大于0:70组(P<0.05),40:30、20:50组有大于0:70组的趋势(P=0.063,P=0.064);各组AE值无显著差异(P>0.05);40:30组的GP24 h、b、a+b均较大,其AE最优,其次是20:50、10:60组。综合以上结果,谷草与苜蓿配比为50:10(精粗比为40:60)和40:30、20:50、10:60(精粗比为30:70)时,可以获得较高的AE。

关键词: 组合效应; 精粗比; 谷草; 苜蓿

Abstract:

This experiment was conducted to investigate the effects of the proportion of alfalfa and rice straw on associative effects (AE) of diets in vitro. Rice straw:alfalfa were 60:0, 50:10, 40:20, 30:30, 20:40,10:50,0:60 when concentrate-roughage ratio (C:R) was 40:60, and rice straw:alfalfa were 70:0, 60:10,50:20, 40:30,30:40,20:50,10:60,0:70 when C:R was 30:70. Gas production (GP) was recorded at 2, 4, 6, 9, 12, 24, 36, 48, 72 and 96 h. The AE was defined as the difference between the observed in vitro GP24 h and the predicted value from individual feed fermented alone. The results showed as follows:① GP24 h of the group 50:10 was extremely significantly greater than the group 10:50 (P<0.01), and GP24 h of the groups 40:20 and 60:0 were significantly greater than the groups 10:50 (P<0.05) when C:R was 40:60. The AE of all groups were positive and there were no significant difference among them (P>0.05). When C:R was 40:60, the GP24 h,b,a+b of group 50:10 were the greatest and it's AE was the best.②GP24 h of the groups 60:10, 70:0 and 50:20 were significantly greater than the group of 0:70 (P<0.05) and groups 40:30 and 20:50 were greater than the group 0:70 (P=0.063, P=0.064) when C:R was 30:70. The AE of all groups had no significant difference (P>0.05). When C:R was 30:70, the GP24 h,b,a+b of group 40:30 was the greatest and it's AE was the best, followed by the groups 20:50 and 10:60. It is concluded that the AE of the groups of 50:10 (C:R was 40:60), 40:30, 20:50 and 10:60 (C:R was 30:70) were greater.

Key words: associative effect; concentrate-roughage ratio; rice straw; alfalfa

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