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Wet Corn Distillers Grains in Lactating Dairy Cow Rations¹

Dairy Science Department, South Dakota State University, Brookings 57007

ABSTRACT

A switchback design experiment with eight cows was used to evaluate wet corn distillers grains (33.9% dry matter) as a feed for lactating cows. All cows were fed corn silage ad libitum and 3.2 kg of alfalfa hay daily. Cows on the control diet were fed an 18.6% crude protein concentrate mix of corn, oats, and soybean meal at 1 kg/2.5 kg milk produced. Cows on the experimental diet were fed 13.6 kg wet distillers grains (34% crude protein, dry) and a 10.9% crude protein concentrate mix of corn and oats at 1 kg/2.5 kg milk produced in excess of 11 kg milk daily. The reduced amount and reduced protein content of the concentrate mix fed to cows on the experimental ration was to compensate for protein and energy consumed as wet distillers grains. Cows averaged 12 wk postpartum at the start of the experiment, which consisted of three 4-wk periods. Cows fed control and wet distillers grains rations produced 27.0 and 27.6 kg of milk daily. No differences in milk fat (3.44 and 3.41%), milk protein (3.09 and 3.10%), or total solids (12.1 and 12.16%) were observed. Total dry matter consumption was similar for control and wet distillers grains rations (20.3 and 20.8 kg dry matter/day). Rumen volatile fatty acids, pH, and ammonia were similar for cows fed control and distillers grains rations. Wet distillers grain can be effective in rations for lactating dairy cattle as a protein and energy source.

¹ Published with the approval of the Director of the South Dakota Agricultural Experiment Station as Publication No. 1820 of the Journal Series.

This article has been cited by other articles:

				C. P. Birkelo, M. J. Brouk, and D. J. Schingoethe The Energy Content of Wet Corn Distillers Grains for Lactating Dairy Cows J Dairy Sci, June 1, 2004; 87(6): 1815 - 1819. [Abstract] [Full Text] [PDF]