Rumen fermentation, milk production and conjugated linoleic acid in the milk of cows fed high fiber diets added with dried distillers grains with solubles

Abstract

The effects of corn dried distillers grains with solubles (DDGS) feeding on rumen fermentation and milk production in cows were evaluated using diets high in neutral detergent fiber (NDF, 45.9-46.6%). The control diet (Control) consisted mainly of hay, corn silage and concentrates. In the experimental diets, the concentrates were replaced with DDGS as 10% dry matter (DM) (10%DDGS) and 20% DM (20%DDGS). Eight cows were used for each 14-day treatment period. Effect of DDGS feeding on DM intake was not significant. Ruminal volatile fatty acids and ammonia-N at 5 h after feeding of 20%DDGS were decreased compared to Control, whereas protozoal count at 2 h after feeding of 20%DDGS was higher than that of 10%DDGS. Milk yield of cows fed DDGS diets was greater than that of Control, although percentages of milk protein and solids-not-fat were decreased by DDGS diets. The proportions of C10:0, C12:0, C14:0 and C16:0 in the milk fat decreased, and those of C18:0, C18:1, C18:2 and cis-9, trans-11 conjugated linoleic acid (CLA) increased markedly with elevated DDGS. Increase in trans-11 C18:1 was observed in the rumen fluid at 5 h after feeding. These findings suggest that DDGS feeding enhanced milk yield, as well as CLA synthesis under a high dietary NDF condition.

Differences in rumen fermentation characteristics between low‐yield and high‐yield dairy cows in early lactation

“…This means that the HY cows likely have a better response to DMI than the LY cows, and could increase milk yield, milk protein, SNF and MUN. This finding was consistent with results reported by Kurokawa et al (2013), which showed different milk yields at similar DMI. Accordingly, the HY group showed high FCE, which would be correlated with some bacterial genera in the rumen as suggested by Jami et al (2014).…”

“…This finding was consistent with results reported by Kurokawa et al . (), which showed different milk yields at similar DMI. Accordingly, the HY group showed high FCE, which would be correlated with some bacterial genera in the rumen as suggested by Jami et al .…”

Feeding dried distillers grains with solubles to lactating beef cows: impact of excess protein and fat on cow performance, milk production and pre-weaning progeny growth

“…Changes in milk fatty acid chain length, n-6 fatty acids and the n-3/n-6 ratio in the current experiment was altered in accordance with Gunn et al (2014) where DDGS-based diets were fed to Angus × Simmental cows. Changes in PUFA, MUFA and CLA in the current experiment are consistent with previous studies that have fed DDGS to Holsteins (Kurokawa et al, 2013) and Angus × Simmental cows (Gunn et al, 2014). SCFA and MCFAs are mainly derived from de novo synthesis in the mammary gland, whereas LCFA are derived from the diet (Bauman and Griinari, 2003).…”

Effect of pH buffering capacity and sources of dietary sulfur on rumen fermentation, sulfide production, methane production, sulfate reducing bacteria, and total Archaea in in vitro rumen cultures

“…The reduced total VFA concentration agrees with what has be observed in other studies when DDGS was fed to ruminants (Uwituze et al, 2011a;Kurokawa et al, 2013). The decrease in total VFA concentration mirrors the decline of DM and NDF digestibility (Table 2).…”

“…However, DDGS contains more sulfur than corn, ranging from 0.3% to greater than 1% , and the high sulfur content in DDGS limits the level of DDGS that can be added to feed. It has been reported that when included at low levels in diet DDGS can be beneficial for both beef and dairy cattle (Benchaar et al, 2013;Kurokawa et al, 2013). However, when large amounts of DDGS are included in the ration of ruminant animals, rumen acidosis can result that reduces dry matter intake (DMI) and feed digestibility because DDGS contains sulfuric acid, which is used in controlling pH during ethanol fermentation and in the cleaning process of bioethanol production.…”