畜牧兽医学报 ›› 2017, Vol. 48 ›› Issue (12): 2347-2357.doi: 10.11843/j.issn.0366-6964.2017.12.014

• 营养与饲料 • 上一篇    下一篇

不同NFC/NDF水平饲粮对犊牛瘤胃发酵参数和微生物区系多样性的影响

李岚捷1,2, 成述儒2, 刁其玉1, 付彤3, 毕研亮1, 王安思3, 李明3, 屠焰1*   

  1. 1. 中国农业科学院饲料研究所, 农业部饲料生物技术重点试验室, 北京 100081;
    2. 甘肃农业大学动物科学技术学院, 兰州 730070;
    3. 河南农业大学牧医工程学院, 郑州 450002
  • 收稿日期:2017-03-09 出版日期:2017-12-23 发布日期:2017-12-23
  • 通讯作者: 屠焰,研究员,博士生导师,E-mail:tuyan@caas.cn
  • 作者简介:李岚捷(1992-),女,甘肃陇西人,硕士生,主要从事动物遗传育种与繁殖研究,E-mail:3034368036@qq.com
  • 基金资助:

    公益性行业科技项目(201303143);河南省科技开放合作项目(152106000029);河南省现代农业产业技术体系建设专项资金(Z-2013-08-01)

Effects of Diets with Different NFC/NDF Levels on the Rumen Fermentation Parameters and Bacterial Community in Male Calves

LI Lan-jie1,2, CHENG Shu-ru2, DIAO Qi-yu1, FU Tong3, BI Yan-liang1, WANG An-si3, LI Ming3, TU Yan*1*   

  1. 1. Key Laboratory of Feed Biotechnology of Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
    2. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
    3. College of Animal Husbandry and Veterinary Science, Henan Agricultural University, Zhengzhou 450002, China
  • Received:2017-03-09 Online:2017-12-23 Published:2017-12-23

摘要:

旨在研究不同非纤维性碳水化合物/中性洗涤纤维(NFC/NDF)水平饲粮对3~6月龄断奶公犊牛瘤胃发酵参数和微生物多样性的影响。选取2~3月龄健康、平均体重为(94.38±0.25)kg的断奶公犊牛30头,随机分为2组,每组15头。分别饲喂粗蛋白质水平相近,NFC/NDF分别为1.35(A组)和0.80(D组)的2种全混合饲粮。试验期105 d,其中预试期15 d,正试期90 d。试验开始后,每组挑选6头体重相近、健康的犊牛,分别在120、150和180日龄晨饲后2 h口腔采集瘤胃液,测定其pH、挥发性脂肪酸、氨态氮浓度和微生物多样性。结果表明:1)饲喂不同NFC/NDF水平饲粮对犊牛瘤胃液pH和总挥发性脂肪酸浓度无显著影响(P>0.05);2)NH3-N和乙酸浓度及乙/丙比A组显著低于D组(P<0.05),而丙酸浓度则A组显著高于D组(P<0.05);3)A组瘤胃微生物多样性指数皆显著低于D组(P<0.05);4)门水平上,拟杆菌门占序列总数的比例A组显著高于D组(P<0.05),属水平上Christensenellaceae_R-7和Prevotellaceae_UCG-003 所占比例D组显著高于A组(P<0.05);5)随着日龄的增加,犊牛瘤胃液细菌多样性指数除Shannon指数外,其他指标皆组间差异显著(P<0.05),微生物组成无显著变化(P>0.05)。综上所述,饲喂不同NFC/NDF水平饲粮,显著影响了断奶犊牛瘤胃中微生物的种类和丰富度,影响属水平上微生物的组成,继而对乙酸和丙酸产量产生影响。

Abstract:

This study assessed the effects of diets with different non-fiber carbohydrate (NFC)/neutral detergent fiber (NDF) levels on rumen fermentation parameters and bacterial community of male calves. Thirty 2-3 month-old healthy weaned male calves with (94.38±0.25)kg were randomly divided into 2 groups with 15 calves each, and were fed 2 types of total mixed ratio diet with the same crude protein level and different NFC/NDF ratios (1.35(A) and 0.80(D)), respectively. The experiment lasted for 105 d, with 15 d of adaptation period and 90 d of formal period. Six calves in each group were selected to collect rumen fluid through oral for 2 hours after morning feeding on the 120, 150 and 180 d. The pH, volatile fatty acids (VFA) and NH3-N concentration and rumen microbial diversity of the rumen fluid samples were determined. The results showed that:1) The dietary NFC/NDF levels had no significant effect on rumen fluid pH and total VFA concentration (P>0.05); 2) Acetate, NH3-N concentration and acetate/propionate ratio in group A were significantly lower than that in group D (P<0.05), propionate content in group A were significantly higher than that in group D (P<0.05); 3) The microbial diversity parameters of rumen fluid of calves in group A were significantly lower than that in group D (P<0.05); 4) At the phylum level, bacteriodetes proportion accounting for the total number of sequences of calves in group A was significantly higher than that in group D (P<0.05), Christensenellaceae_R-7 and Prevotellaceae_UCG-003 proportions accounting for the total number of sequences of calves in group D was significantly higher at the genus level than that in group A (P<0.05); 5) With the age increasing, the diversity indices except for Shannon index, were significantly different between the 2 groups (P<0.05), but there was no significant difference in rumen microbial composition between the 2 groups(P>0.05). In summary, the dietary NFC/NDF levels significantly affect the species and abundance of the rumen microorganisms, and the level of genus of microorganisms, finally affect the yield of acetate and propionate.

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