Effects of the chop lengths of alfalfa silage and oat silage on feed intake, milk production, feeding behavior, and rumen fermentation of dairy cows

Journal of Dairy Science
S K BhandariJ C Plaizier

Abstract

Effects of chop length (shorter: 6 mm, or longer: 19 mm) of alfalfa silage and oat silage were determined in 16 mid-lactation Holstein cows, 4 of which were rumen cannulated, using a replicated 4 x 4 Latin square design with a 2 x 2 arrangement of treatments. Experimental periods were 21 d long and consisted of 14 d of adaptation and 7 d of sampling. Cows received a total mixed ration containing [dry matter (DM) basis] 42.0% barley grain-based energy supplement, 10% protein supplement, and 24% of DM longer chop or shorter chop alfalfa silage and 24% of DM longer chop or shorter chop oat silage. Rumen pH was measured continuously, and rumen liquid flow rates were determined in rumen-cannulated cows. Feeding behavior was determined by videotaping, and meal patterns were determined by continuously weighing the feed in the bunk of 8 cows. Reducing the chop length of alfalfa silage and oat silage reduced the average geometric particle length from 14.2 to 10.9 mm and from 13.4 to 10.4 mm, respectively. Reducing the alfalfa chop length did not affect feed intake, whereas reducing the oat silage chop length increased DM intake from to 19.4 to 21.2 kg/d. Reducing the chop lengths of alfalfa silage and oat silage chop length did not affe...Continue Reading

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Citations

Jul 23, 2014·Asian-Australasian Journal of Animal Sciences·P GununN Anantasook
Jan 21, 2019·Animal Science Journal = Nihon Chikusan Gakkaihō·Fu-Gui JiangZhong-Hua Wang
Aug 9, 2011·Journal of Animal Science·B-O RustasE Nadeau
Jun 9, 2016·Animal Science Journal = Nihon Chikusan Gakkaihō·Chunfu QinJiaqi Wang
Feb 11, 2014·Journal of Dairy Science·S J KrizsanP Huhtanen
Nov 11, 2019·Journal of Dairy Science·A MenschingA R Sharifi

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