Correlation between Content of Odd- and Branched-Chain Fatty Acids in Rumen Fluid, Plasma and Milk and Their Precursors Content

SUN Lingling; GAO Shengtao; MA Lu; SHEN Yifan; WEN Wan; BU Dengpan

doi:10.3969/j.issn.1006-267x.2022.06.026

2022 , Vol. 34 >Issue 6: 3645 - 3656

DOI: https://doi.org/10.3969/j.issn.1006-267x.2022.06.026

RESEARCHPAPER

Correlation between Content of Odd- and Branched-Chain Fatty Acids in Rumen Fluid, Plasma and Milk and Their Precursors Content

SUN Lingling ,
GAO Shengtao ,
MA Lu ,
SHEN Yifan ,
WEN Wan ,
BU Dengpan

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1. State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academia of Agricultural Sciences, Beijing 100193, China;
2. Chinese Academy of Agricultural Sciences and World Agroforestry Center Joint Lab on Agroforestry and Sustainable Animal Husbandry, Beijing 100193, China;
3. Animal Husbandry Extension Station, Yinchuan 750001, China

Received date: 2021-11-14

Online published: 2022-06-14

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Abstract

This experiment aimed to explore the correlation between the synthetic precursors of odd- and branched-chain fatty acids (OBCFA) in rumen and the content of OBCFA in rumen fluid, plasma and milk. Twenty-seven healthy Holstein dairy cows with similar body weight, parity, lactation age and milk yield were selected, all cows were kept in the same house and fed the same diet for 4 weeks. The rumen fluid, blood and milk samples of the cows were collected on the last 3 days, and the contents of branched-chain amino acids (BCAA), volatile fatty acids (VFA) and OBCFA in rumen fluid and the content of OBCFA in plasma and milk were determined. The results showed as follows:1) the correlation between propionic acid and valeric acid contents and odd-chain fatty acids content in rumen fluid was weak, both branched-chain VFA and BCAA in rumen fluid could find the OBCFA in rumen fluid with significant (P<0.05) or extremely significant (P<0.01) correlation in rumen fluid, and the above correlations were mostly medium-strength correlations. 2) The contents pf propionic acid and valeric acid in rumen fluid were significantly positively correlated with plasma n-heptadecanoic acid (n-17:0) content, both branched chain VFA and BCAA in rumen fluid could find the OBCFA in plasma with significant (P<0.05) or extremely significant (P<0.01) correlation in the plasma, and the above correlations were mostly weak or moderately strong. 3) The content of propionic acid in rumen fluid and the content of odd-chain fatty acids in milk were not significant correlation (P>0.10), and the content of valeric acid in rumen fluid and the content of n-17:0 in milk tended to be significantly positively correlated (P<0.10). There was a weak correlation between the contents of branched-chain VFA and BCAA in rumen fluid and the content of OBCFA in milk. 4) There was a moderately strong correlation of content of OBCFA in rumen fluid and milk. In conclusion, changing the content of synthetic OBCFA precursors in rumen is a potential nutritional regulation strategy to increase the content of OBCFA in milk.

Key words： dairy cows; odd- and branched-chain fatty acids; branched-chain amino acids; volatile fatty acids; correlation

Cite this article

SUN Lingling , GAO Shengtao , MA Lu , SHEN Yifan , WEN Wan , BU Dengpan . Correlation between Content of Odd- and Branched-Chain Fatty Acids in Rumen Fluid, Plasma and Milk and Their Precursors Content[J]. Chinese Journal of Animal Nutrition, 2022 , 34(6) : 3645 -3656 . DOI: 10.3969/j.issn.1006-267x.2022.06.026

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