Advanced search
1 file | 1.24 MB Add to list

Susceptibility of dairy cows to subacute ruminal acidosis is reflected in milk fatty acid proportions, with C18:1 trans-10 as primary and C15:0 and C18:1 trans-11 as secondary indicators

(2018) JOURNAL OF DAIRY SCIENCE. 101(11). p.9827-9840
Author
Organization
Abstract
The current study was carried out to assess 2 hypotheses: (1) cows differ in susceptibility to a subacute ruminal acidosis (SARA) challenge, and (2) the milk fatty acid (FA) pattern can be used to differentiate susceptible from nonsusceptible cows. For this, 2 consecutive experiments were performed. During experiment 1, the milk FA pattern was determined on 125 cows fed an increasing amount of concentrate during the first 4 wk in milk (WIM). The coefficient of variation of several SARA indicative milk FA (i.e., C15:0, C18:1 trans-10, C18:2 cis-9, trans-11, and C18:1 trans-10 to C18:1 trans-11 ratio) increased, indicating that cows reacted differently upon the concentrate build-up. A first grouping was based on the milk fat C18:1 trans-10 proportion in the third WIM. Fifteen cows with the highest proportion of the latter FA (HT10) and their counterparts with low C18:1 trans-10 and equal parity distribution (LT10) were compared, which revealed that milk fat content and milk fat to protein ratio were lower for the HT10 group. From each of the HT10 and LT10 groups, 5 animals were selected for experiment 2. The subselection of the HT10 group, referred to as HT10s, showed a high proportion of C18:1 trans-10 at 3 WIM (> 0.31 g/100 g of FA), a high level of C15:0 (on average >= 1.18 g/100 g of FA over the 4 WIM), and a sharp decrease of C18:1 trans-11 (Delta >= 0.25 g/100 g of FA during the 4 WIM). Their counterparts (LT10s) had a low milk fat C18:1 trans-10 proportion at 3 WIM (< 0.23 g/100 g of FA), an average C15:0 proportion of 0.99 g/100 g of FA or lower, and a rather stable C18:1 trans-11 proportion. The HT10s group was hypothesized to be more susceptible to a SARA challenge, achieved by increasing amounts of rapidly fermentable carbohydrates in experiment 2. The HT10s cows had a lower nadir, mean, and maximum reticulo-ruminal pH; longer period of reticulo-ruminal pH below 6.0; and higher daily reticulo-ruminal pH variation compared with LT10s cows. Throughout experiment 2, HT10s and LT10s cows differed in levels of SARA indicative milk FA. Five animals, including one LT10s and 4 HT10s cows, experienced SARA, defined as reticulo-ruminal pH < 6.0 for more than 360 min/d. These results indicate that it is possible to distinguish cows with different susceptibility to a SARA challenge within a herd by monitoring the milk FA composition when cows receive the same diet.
Keywords
CHEWING ACTIVITIES, HOLSTEIN COWS, RUMEN, FERMENTATION, PH, LACTATION, PROFILE, CHAIN, BIOHYDROGENATION, PERFORMANCE, subacute ruminal acidosis, animal variability, milk fatty acid, reticulo-ruminal pH, biomarker

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 1.24 MB

Citation

Please use this url to cite or link to this publication:

MLA
Jing, Longhui et al. “Susceptibility of Dairy Cows to Subacute Ruminal Acidosis Is Reflected in Milk Fatty Acid Proportions, with C18:1 Trans-10 as Primary and C15:0 and C18:1 Trans-11 as Secondary Indicators.” JOURNAL OF DAIRY SCIENCE 101.11 (2018): 9827–9840. Print.
APA
Jing, L., Dewanckele, L., Vlaeminck, B., Van Straalen, W., Koopmans, A., & Fievez, V. (2018). Susceptibility of dairy cows to subacute ruminal acidosis is reflected in milk fatty acid proportions, with C18:1 trans-10 as primary and C15:0 and C18:1 trans-11 as secondary indicators. JOURNAL OF DAIRY SCIENCE, 101(11), 9827–9840.
Chicago author-date
Jing, Longhui, Lore Dewanckele, Bruno Vlaeminck, WM Van Straalen, A Koopmans, and Veerle Fievez. 2018. “Susceptibility of Dairy Cows to Subacute Ruminal Acidosis Is Reflected in Milk Fatty Acid Proportions, with C18:1 Trans-10 as Primary and C15:0 and C18:1 Trans-11 as Secondary Indicators.” Journal of Dairy Science 101 (11): 9827–9840.
Chicago author-date (all authors)
Jing, Longhui, Lore Dewanckele, Bruno Vlaeminck, WM Van Straalen, A Koopmans, and Veerle Fievez. 2018. “Susceptibility of Dairy Cows to Subacute Ruminal Acidosis Is Reflected in Milk Fatty Acid Proportions, with C18:1 Trans-10 as Primary and C15:0 and C18:1 Trans-11 as Secondary Indicators.” Journal of Dairy Science 101 (11): 9827–9840.
Vancouver
1.
Jing L, Dewanckele L, Vlaeminck B, Van Straalen W, Koopmans A, Fievez V. Susceptibility of dairy cows to subacute ruminal acidosis is reflected in milk fatty acid proportions, with C18:1 trans-10 as primary and C15:0 and C18:1 trans-11 as secondary indicators. JOURNAL OF DAIRY SCIENCE. 2018;101(11):9827–40.
IEEE
[1]
L. Jing, L. Dewanckele, B. Vlaeminck, W. Van Straalen, A. Koopmans, and V. Fievez, “Susceptibility of dairy cows to subacute ruminal acidosis is reflected in milk fatty acid proportions, with C18:1 trans-10 as primary and C15:0 and C18:1 trans-11 as secondary indicators,” JOURNAL OF DAIRY SCIENCE, vol. 101, no. 11, pp. 9827–9840, 2018.
@article{8579912,
  abstract     = {The current study was carried out to assess 2 hypotheses: (1) cows differ in susceptibility to a subacute ruminal acidosis (SARA) challenge, and (2) the milk fatty acid (FA) pattern can be used to differentiate susceptible from nonsusceptible cows. For this, 2 consecutive experiments were performed. During experiment 1, the milk FA pattern was determined on 125 cows fed an increasing amount of concentrate during the first 4 wk in milk (WIM). The coefficient of variation of several SARA indicative milk FA (i.e., C15:0, C18:1 trans-10, C18:2 cis-9, trans-11, and C18:1 trans-10 to C18:1 trans-11 ratio) increased, indicating that cows reacted differently upon the concentrate build-up. A first grouping was based on the milk fat C18:1 trans-10 proportion in the third WIM. Fifteen cows with the highest proportion of the latter FA (HT10) and their counterparts with low C18:1 trans-10 and equal parity distribution (LT10) were compared, which revealed that milk fat content and milk fat to protein ratio were lower for the HT10 group. From each of the HT10 and LT10 groups, 5 animals were selected for experiment 2. The subselection of the HT10 group, referred to as HT10s, showed a high proportion of C18:1 trans-10 at 3 WIM (> 0.31 g/100 g of FA), a high level of C15:0 (on average >= 1.18 g/100 g of FA over the 4 WIM), and a sharp decrease of C18:1 trans-11 (Delta >= 0.25 g/100 g of FA during the 4 WIM). Their counterparts (LT10s) had a low milk fat C18:1 trans-10 proportion at 3 WIM (< 0.23 g/100 g of FA), an average C15:0 proportion of 0.99 g/100 g of FA or lower, and a rather stable C18:1 trans-11 proportion. The HT10s group was hypothesized to be more susceptible to a SARA challenge, achieved by increasing amounts of rapidly fermentable carbohydrates in experiment 2. The HT10s cows had a lower nadir, mean, and maximum reticulo-ruminal pH; longer period of reticulo-ruminal pH below 6.0; and higher daily reticulo-ruminal pH variation compared with LT10s cows. Throughout experiment 2, HT10s and LT10s cows differed in levels of SARA indicative milk FA. Five animals, including one LT10s and 4 HT10s cows, experienced SARA, defined as reticulo-ruminal pH < 6.0 for more than 360 min/d. These results indicate that it is possible to distinguish cows with different susceptibility to a SARA challenge within a herd by monitoring the milk FA composition when cows receive the same diet.},
  author       = {Jing, Longhui and Dewanckele, Lore and Vlaeminck, Bruno and Van Straalen, WM and Koopmans, A and Fievez, Veerle},
  issn         = {0022-0302},
  journal      = {JOURNAL OF DAIRY SCIENCE},
  keywords     = {CHEWING ACTIVITIES,HOLSTEIN COWS,RUMEN,FERMENTATION,PH,LACTATION,PROFILE,CHAIN,BIOHYDROGENATION,PERFORMANCE,subacute ruminal acidosis,animal variability,milk fatty acid,reticulo-ruminal pH,biomarker},
  language     = {eng},
  number       = {11},
  pages        = {9827--9840},
  title        = {Susceptibility of dairy cows to subacute ruminal acidosis is reflected in milk fatty acid proportions, with C18:1 trans-10 as primary and C15:0 and C18:1 trans-11 as secondary indicators},
  url          = {http://dx.doi.org/10.3168/jds.2018-14903},
  volume       = {101},
  year         = {2018},
}

Altmetric
View in Altmetric
Web of Science
Times cited: