畜牧兽医学报 ›› 2014, Vol. 45 ›› Issue (4): 578-586.doi: 10.11843/j.issn.0366-6964.2014.04.011

• 动物营养 • 上一篇    下一篇

体外培养法研究三聚氰胺的降解规律及其对瘤胃发酵参数的影响

姜成钢1 ,闫贵龙2 ,屠焰1 ,张乃锋1 ,刁其玉1*   

  1. (1.中国农业科学院饲料研究所,北京 100081; 2.河北北方学院,张家口 075000)
  • 收稿日期:2014-01-15 出版日期:2014-04-23 发布日期:2014-04-23
  • 通讯作者: 刁其玉,研究员,博士生导师,E-mail:diaoqiyu@caas.cn
  • 作者简介:姜成钢(1980-),男,浙江江山人,助理研究员,主要从事反刍动物生理营养研究, E-mail:cgj027@163.com
  • 基金资助:

    农业部“饲料中三聚氰胺限量制定专项”;奶牛产业技术体系北京市创新团队

The Study on Degradability of Melamine and Effcet of Fermentation Characteristics in vitro

JIANG Cheng-gang1,YAN Gui-long2,TU Yan1,ZHANG Nai-feng1,DIAO Qi-yu1*   

  1. (1.Feed Research Institute,Chinese Academy of Agricultural Sciences,Beijing 100081, China;2.Hebei North University,Zhangjiakou 075000, China)
  • Received:2014-01-15 Online:2014-04-23 Published:2014-04-23

摘要:

本试验采用体外培养法研究三聚氰胺(Melamine,MEL)对瘤胃发酵参数的影响。MEL的添加水平分别为0、2、10、50、250和1 250 mg•L-1,培养时间分别为0、1、2、4、6、8、12、24和48 h,测定了培养液中MEL的浓度变化,总挥发性脂肪酸(TVFA)、乙酸、丙酸、丁酸、戊酸、异丁酸、异戊酸含量和NH3-N浓度。结果表明:MEL在瘤胃液中培养48 h没有被降解(P>0.05),添加MEL降低了干物质降解率(DMD)(P<0.05),提高了丁酸的摩尔比例(P<0.05),MEL为1 250 mg•L-1时会降低丙酸摩尔比例(P<0.05),提高了乙∶丙酸比值(P<0.05)。MEL抑制瘤胃微生物生长,不能作为瘤胃微生物非蛋白氮来源。

Abstract:

This experiment was conducted to investigate the effects of melamine on ruminal fermentation parameters in vitro.Melamine was supplemented at graded levels:0,2,10,50,250,1 250 mg•L-1,respectively.Incubation mediums were taken after incubation of 0,1,2,4,6,8,12,24 and 48 h,respectively.Melamine,total fatty acid (TVFA),acetic acid,propionic acid,butyric acid,valeric acid,isobutyric acid,isovaleric acid and ammonia nitrogen concentration were determined.The result showed that melamine supplementation resulted in no change in MEL degradation during 48 h incubation (P>0.05) but decreased dry matter degradability (DMD)(P<0.05).With MEL supplementation at the level of 1 250 mg•L-1,molar proportion of propionic acid decreased(P<0.05)while ratio of acetic acid to propionic acid increased(P<0.05).Molar proportion of butyric acid increased(P<0.05)with MEL supplementation.Melamine showed an inhibitory effect on ruminal microbial fermentation and might not be effectively used by ruminal microbes.Therefore,MEL could not be used as a non-protein nitrogen source for feeding ruminant animals.

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