Evaluation of rumen fatty acid hydrogenation intermediates and differences in bacterial communities after feeding wheat- or corn-based dried distillers grains to feedlot cattle1

2012 ◽  
Vol 90 (8) ◽  
pp. 2699-2709 ◽  
Author(s):  
N. Aldai ◽  
A. V. Klieve ◽  
M. E. R. Dugan ◽  
J. K. G. Kramer ◽  
D. Ouwerkerk ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Bacterial Communities ◽  
Distillers Grains ◽  
Dried Distillers Grains ◽  
Fatty Acid Hydrogenation

Replacing canola meal as the major protein source with wheat dried distillers’ grains alters omasal fatty acid flow and milk fatty acid composition in dairy cows

2013 ◽  
Vol 93 (1) ◽  
pp. 137-147 ◽  
Author(s):  
G. E. Chibisa ◽  
D. A. Christensen ◽  
T. Mutsvangwa
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Dairy Cows ◽  
Distillers Grains ◽  
Protein Source ◽  
Canola Meal ◽  
Major Protein ◽  
Milk Fatty Acid ◽  
Total N ◽  
Dried Distillers Grains

Chibisa, G. E., Christensen, D. A. and Mutsvangwa, T. 2013. Replacing canola meal as the major protein source with wheat dried distillers’ grains alters omasal fatty acid flow and milk fatty acid composition in dairy cows. Can. J. Anim. Sci. 93: 137–147. Wheat dried distillers’ grains with solubles (W-DDGS) has a high fat content and is now commonly fed to dairy cows in western Canada. The objective was to determine the effects of replacing canola meal (CM) with W-DDGS on omasal fatty acid (FA) flow and milk FA composition. Four ruminally-cannulated lactating dairy cows were used in a 4×4 Latin square design with 28-d periods. Cows were fed either a standard barley silage-based total mixed ration (TMR) (0% W-DDGS, control) or TMR containing 10, 15 and 20% W-DDGS, with W-DDGS replacing CM as the major protein source. The omasal flow of C18:1 trans-10, C18:1 trans-11, C18:2n-6, C18:3n-3, conjugated linoleic acid (CLA) cis-9, trans-11, and total CLA increased linearly with increasing levels of W-DDGS. There were quadratic changes in milk concentrations of total C18:2, C18:3n-3, total n-3 polyunsaturated fatty acid (PUFA), and total n-6 PUFA as the level of W-DDGS increased. Feeding increasing amounts of W-DDGS resulted in a linear increase in milk concentrations of CLA cis-9, trans-11, CLA trans-11, trans-13, and total CLA, whereas milk concentrations of C18:1 trans-11 tended to increase linearly when level of W-DDGS increased. Feeding increasing amounts of W-DDGS resulted in quadratic changes in milk concentrations of C18:2n-6 and C18:3n-3. In summary, feeding increasing amounts of W-DDGS increased milk concentrations of key FA like C18:2n-6, C18:3n-3, CLA cis-9, trans-11, and total CLA, which can potentially improve human health.

scholarly journals PSI-32 Impact of titrating levels of dried distillers grains with solubles as a replacement of soybean meal on Boer goat fat quality

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 254-254
Author(s):  
Linnea Rimmer ◽  
Cassandra K Jones
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Fatty Acid Profile ◽  
Distillers Grains ◽  
Fatty Acid Profiles ◽  
Boer Goat ◽  
Distillers Grains With Solubles ◽  
Dried Distillers Grains ◽  
Fat Quality ◽  
The Impact

Abstract Due to the rising goat population in the United States, there is growing economic incentive to feed dried distillers grains with solubles (DDGS) over soybean meal (SBM). However, there is limited knowledge of how this may affect carcass composition. Therefore, the objective of this experiment was to evaluate the impact of titrating levels of DDGS as a replacement of SBM on Boer goat fatty acid profiles. Thirty-two Boer goat kids were fed isocaloric and isonitrogenous diets consisting of 0%, 33%, 66%, and 100% DDGS replacing SBM. There were no detected differences (P > 0.05) in final body weight after a 47-d growth experiment. Goats were slaughtered in a commercial, USDA-inspected facility, backfat samples collected between the 12th and 13th rib, and samples analyzed for fatty acid profile via AOAC Official Method 996.06. Data were analyzed with goat as the experimental unit in a completely randomized design. Dietary treatment did not impact (P > 0.05) the overall fatty acid profile or iodine value (50 to 52 points) of fat samples. This may be because fatty acids go through biohydrogenation by rumen bacteria, limiting the impact of diet on fatty acid profile. That said, increasing levels of DDGS impacted (P = 0.03) both C16:1 and C18:3 in a quadratic manner. Specifically, goats fed 0% and 100% DDGS replacing SBM had higher C16:1 than those fed intermediate levels of DDGS, while the opposite was true for C18:3. No other fatty acid was affected (P > 0.05), nor were there shifts in the ratio of saturated vs. unsaturated, or the total sum of n-3 fatty acids. In summary, fatty acid profiles are not significantly impacted by increasing levels of DDGS in place of SBM, and therefore DDGS can be used in Boer goat diets without impacting fat quality.

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