Effects of feeding alkaline hydrogen peroxide-treated wheat straw-based diets on digestion and production by dairy cows

Journal of Dairy Science
M R CameronL L Berger

Abstract

Twelve Holstein cows, averaging 34 d postpartum, were used in three replications of a 4 x 4 Latin square design to determine the effects of feeding different levels of alkaline hydrogen peroxide-treated wheat straw on digestion and production responses in lactating dairy cows. Complete mixed diets consisted of 50% concentrate (DM basis) plus varying proportions of treated wheat straw, alfalfa haylage, and corn silage as the forage source. Treatment contained 0 (control), 12.5 (low), 25.0 (medium), or 37.5% (high) treated wheat straw in the diet. Dry matter intakes were 18.5, 17.2, 17.4, and 16.7 kg/d for the four treatments, respectively. Apparent digestibilities of DM and OM were decreased (approximately 4.4 percentage units), and NDF and ADF digestibilities were increased by 9.4 and 3.0 percentage units, respectively, with the high wheat straw diet. Yields of milk and 4% FCM, and SNF percentage did not differ among the treatment groups. Milk fat percentage increased (from 3.07 to 3.32%) and milk protein percentage decreased (from 2.61 to 2.56%) as the proportion of treated wheat straw increased in the diet. Cows fed the higher proportions of treated wheat straw had increased ruminal concentrations of total VFA and molar perce...Continue Reading

Citations

Jul 1, 1997·Journal of Dairy Science·D R Mertens
Apr 1, 2019·Journal of Dairy Science·A T AdesoganD Vyas
Jun 27, 2015·Journal of Animal Science·A K WatsonT J Klopfenstein
Jan 22, 2013·Tropical Animal Health and Production·Ebrahim GhasemiKeikhosro Karimi

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