Translator Disclaimer
29 August 2013 Invited Review: Ethanol co-products for dairy cows: there goes our starch … now what?
Author Affiliations +
Abstract

Paz, H. A., Castillo-Lopez, E., Ramirez-Ramirez, H. A., Christensen, D. A., Klopfenstein, T. J. and Kononoff, P. J. 2013. Invited Review: Ethanol co-products for dairy cows: there goes our starch … now what? Can. J. Anim. Sci. 93: 407-425. The rise of the grain-ethanol industry has resulted in a dramatic increase in the availability of feed co-products namely, distillers' grains with solubles (DG). The cost of feeds that have traditionally been used for energy continues to increase and there is a need to understand the potential impact of replacing these feeds with DG on milk yield and composition. Using the Dairy National Research Council (2001) model and data from a total of 25 published studies (81 observations), we used a meta-analytical procedure to evaluate the impact of feeding corn milling co-products on lactating dairy cows. Based on our model, the inclusion of DG did not affect dry matter intake (P=0.35) but a trend for an increase in milk yield was observed (P=0. 10). Additionally, the percentages of milk fat and protein in the milk were not affected (P=0.24 and 0.25, respectively). The modeled daily rumen outflow of Lys in grams was significantly (P<0.01) reduced and Met was not affected (P=0.79) when DG were included. The error associated with net energy of lactation allowable milk averaged 5.0±1.0 kg d-1 and was not affected by DG (P=0.79) but the error associated with metabolizable protein allowable milk tended (P=0.10) to be higher for cows consuming DG by 1.4±1.2 kg d-1.

H. A. Paz, E. Castillo-Lopez, H. A. Ramirez-Ramirez, D. A. Christensen, T. J. Klopfenstein, and P. J. Kononoff "Invited Review: Ethanol co-products for dairy cows: there goes our starch … now what?," Canadian Journal of Animal Science 93(4), (29 August 2013). https://doi.org/10.1139/CJAS2013-048
Received: 4 April 2013; Accepted: 21 August 2013; Published: 29 August 2013
JOURNAL ARTICLE
19 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top