title: 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.
authors: Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Japan.
authors: Yuzo
authors: Y
authors: Kurokawa
authors: Hiroko
authors: H
authors: Shibata
authors: Shoko
authors: S
authors: Tateno
authors: Shuhei
authors: S
authors: Kanda
authors: Kazuki
authors: K
authors: Takaura
authors: Souichi
authors: S
authors: Ishida
authors: Hisao
authors: H
authors: Itabashi
mesh_terms: D000641:Ammonia / Q000378:metabolism; D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002417:Cattle / Q000502:physiology*; D004043:Dietary Fiber / Q000008:administration & dosage*; D002523:Edible Grain; D005232:Fatty Acids, Volatile / Q000378:metabolism; D005260:Female; D005285:Fermentation; D007774:Lactation; D044243:Linoleic Acids, Conjugated / Q000096:biosynthesis* / Q000378:metabolism; D008892:Milk / Q000378:metabolism*; D012417:Rumen / Q000378:metabolism*; D012820:Silage; D012995:Solubility; D003313:Zea mays
chemical_list: D004043:Dietary Fiber; D005232:Fatty Acids, Volatile; D044243:Linoleic Acids, Conjugated; D000641:Ammonia