Influences of dietary nitrogen and non-fiber carbohydrate levels on apparent digestibility, rumen fermentation and nitrogen utilization in growing yaks fed low quality forage based-diet
文献类型：期刊论文
| 作者 | Zhang, Y.; Zhou, J. W.; Guo, X. S.1,2,3; Cui, G. X.; Ding, L. M.1,2,3; Wang, H. C.; Li, L. W.4; Long, R. J.1,2 |
| 刊名 | LIVESTOCK SCIENCE
 |
| 出版日期 | 2012-08-01 |
| 卷号 | 147期号:1-3页码:139-147 |
| 关键词 | Rumen Fermentation Digestibility Protein Non-fiber Carbohydrate Yak |
| ISSN号 | 1871-1413 |
| DOI | 10.1016/j.livsci.2012.04.013 |
| 文献子类 | Article |
| 英文摘要 | The effects of dietary N and non-fiber carbohydrate (NFC) levels on nutrient digestibility, ruminal fermentation, and nitrogen utilization were investigated in growing yaks. Four diets (N content: 1.43%, 1.97%, 2.45% and 2.90% of DM basis; ratio of dietary NFC and RDP: 5.9, 3.2, 2.2 and 1.6) were offered to four yaks in a 4 x 4 Latin square design. Dietary N and NFC did not affect the gastrointestinal tract digestibility of DM. organic matter (OM), NFC, NDF, or ADF (P > 0.05). Ruminal pH value, molar proportion of butyrate, and ratio of acetate to propionate were not affected by the diets (P > 0.05): whereas, molar proportions of acetate, propionate, iso-butyrate, iso-valerate, valerate, and total VFA concentration in rumen fluid increased linearly (P < 0.01) with increase in dietary N and decrease in dietary NFC. Except for ruminal NH3-N and soluble protein N, free amino acid-N and peptide-N maintained constantly within the sampling time (from 0 to 8 h of post feeding; P > 0.05). The increment of N intake linearly increased the N retention (P=0.003), but no difference (P > 0.05) was observed in the ratio of N retention to the gastrointestinal trace absorbed N after dietary N reached to 2.45% of DM. Microbial N supply had linear and quadric (P < 0.001) responses to the dietary N, and the highest microbial N synthesis efficiency was observed when the yaks were fed with 1.97% N diet in which ratio of NFC to RDP was 3.2, and dietary NFC and RDP were 20.2% and 6.7% of DM, respectively. Total purine derivatives excretion and microbial purine N:total N had a quadric (P < 0.05) response to the dietary N. Results of the current experiment suggest that maximizing N utilization and microbial efficiency were obtained when the yaks were fed a diet with an optimal dietary ratio of NFC to RDP. (C) 2012 Elsevier B.V. All rights reserved. |
| WOS关键词 | QINGHAI-TIBETAN PLATEAU ; PURINE DERIVATIVE EXCRETION ; LACTATING DAIRY-COWS ; CATTLE BOS-TAURUS ; MICROBIAL-GROWTH ; RUMINAL CHARACTERISTICS ; GASTROINTESTINAL-TRACT ; UREA NITROGEN ; PROTEIN ; CONCENTRATE |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:000306161900019 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | National Natural Science Foundation of China(31170378) ; National Natural Science Foundation of China(31170378) ; Basic Research Foundation for Central Government University of Lanzhou University(lzujbky-2009-46) ; Basic Research Foundation for Central Government University of Lanzhou University(lzujbky-2009-46) ; National Natural Science Foundation of China(31170378) ; National Natural Science Foundation of China(31170378) ; Basic Research Foundation for Central Government University of Lanzhou University(lzujbky-2009-46) ; Basic Research Foundation for Central Government University of Lanzhou University(lzujbky-2009-46) ; National Natural Science Foundation of China(31170378) ; National Natural Science Foundation of China(31170378) ; Basic Research Foundation for Central Government University of Lanzhou University(lzujbky-2009-46) ; Basic Research Foundation for Central Government University of Lanzhou University(lzujbky-2009-46) ; National Natural Science Foundation of China(31170378) ; National Natural Science Foundation of China(31170378) ; Basic Research Foundation for Central Government University of Lanzhou University(lzujbky-2009-46) ; Basic Research Foundation for Central Government University of Lanzhou University(lzujbky-2009-46) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/80230]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Long, R. J. |
| 作者单位 | 1.Lanzhou Univ, Int Ctr Tibetan Plateau Ecosyst Management, Lanzhou 730000, Peoples R China 2.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Pastoral Agr Ecosyst, Lanzhou 730000, Peoples R China 3.Lanzhou Univ, Sch Life Sci, State Key Lab Pastoral Agr Ecosyst, Lanzhou 730000, Peoples R China 4.Chinese Acad Sci, Key Lab Petr Resources Res, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Y.,Zhou, J. W.,Guo, X. S.,et al. Influences of dietary nitrogen and non-fiber carbohydrate levels on apparent digestibility, rumen fermentation and nitrogen utilization in growing yaks fed low quality forage based-diet[J]. LIVESTOCK SCIENCE,2012,147(1-3):139-147. |
| APA | Zhang, Y..,Zhou, J. W..,Guo, X. S..,Cui, G. X..,Ding, L. M..,...&Long, R. J..(2012).Influences of dietary nitrogen and non-fiber carbohydrate levels on apparent digestibility, rumen fermentation and nitrogen utilization in growing yaks fed low quality forage based-diet.LIVESTOCK SCIENCE,147(1-3),139-147. |
| MLA | Zhang, Y.,et al."Influences of dietary nitrogen and non-fiber carbohydrate levels on apparent digestibility, rumen fermentation and nitrogen utilization in growing yaks fed low quality forage based-diet".LIVESTOCK SCIENCE 147.1-3(2012):139-147. |
入库方式： OAI收割
来源：地质与地球物理研究所
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