In vivo determination of rumen undegradable protein of dried distillers grains with solubles and evaluation of duodenal microbial crude protein flow

2013 ◽  
Vol 91 (2) ◽  
pp. 924-934 ◽  
Author(s):  
E. Castillo-Lopez ◽  
T. J. Klopfenstein ◽  
S. C. Fernando ◽  
P. J. Kononoff
Keyword(s):  
Crude Protein ◽  
Distillers Grains ◽  
Distillers Grains With Solubles ◽  
Dried Distillers Grains ◽  
Rumen Undegradable Protein

scholarly journals Inclusion of Wheat Dried Distillers’ Grains with Solubles from Bioethanol Plants in Diets for Dairy Cows

Animals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 70
Author(s):  
Philip C. Garnsworthy ◽  
Michael Marsden ◽  
Jennifer R. Goodman ◽  
Neil Saunders
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Saturated Fat ◽  
Latin Square ◽  
Distillers Grains ◽  
Distillers Grains With Solubles ◽  
Dried Distillers Grains ◽  
Inclusion Level ◽  
Metabolisable Energy

Dried distillers’ grains with solubles (DDGS) from bioethanol production can replace soya in diets for dairy cows, but the optimum inclusion level of European wheat DDGS (wDDGS) is unknown. Two batches of wDDGS from different UK bioethanol plants were fed to 44 (Experiment 1) and 40 (Experiment 2) cows in a Latin square design. Each wDDGS replaced soya and rapeseed at four inclusion levels (g/kg of diet dry matter (DM): 0, 80, 160 and 240—Experiment 1; 0, 75, 150 and 225—Experiment 2). Diets were balanced for metabolisable energy (ME) and protein (MP), and for minimum starch and saturated fat in Experiment 2. In Experiment 1, DM intake (29 kg/day) and milk yield (42.3 kg/day) were unaffected by wDDGS inclusion up to 160 g/kg but were lower than control with 240 g/kg inclusion, which was attributed to the low proportion of solubles in this wDDGS batch. In Experiment 2, DM intake (22.4 kg/day) and milk yield (32.1 kg/day) were unaffected by wDDGS inclusion up to 225 g/kg. ME content of wDDGS, determined in vivo (MJ/kg DM) was 12.1 (Experiment 1) and 13.4 (Experiment 2). It is concluded that the optimum inclusion level of wDDGS is at least 225 g/kg DM in diets balanced for minimum starch and saturated fat as well as ME and MP supplies.

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