期刊
ANIMAL FEED SCIENCE AND TECHNOLOGY
卷 155, 期 2-4, 页码 147-155出版社
ELSEVIER
DOI: 10.1016/j.anifeedsci.2009.11.004
关键词
AFEX; Forage ammoniation; NDF digestion; Switchgrass; Corn stover
资金
- Michigan State University Research Foundation
With the increased attention to bioenergy and especially cellulosic ethanol, there are concerns regarding potential competition for available land between biofuels and feeds/foods. Ammonia fiber expansion (AFEX), a pretreatment process for cellulosic ethanol, may also be used to improve ruminant digestibility of feedstuffs not traditionally used as forages. Eleven forages - including traditional forages, agricultural residues, and dedicated energy crops - were AFEX treated and digested in vitro with rumen inoculum. AFEX treatment improved 48-h neutral detergent fiber (aNDFom) digestion for several moderately indigestible forages compared to untreated samples, but showed no improvement for highly digestible samples. Of particular interest are corn stover and late-harvest switchgrass, as AFEX treatment improved digestibility by 52% and 128% over untreated material, whereas the improvement was 74% and 70% over conventional ammonia treatment, respectively. The Crude protein content of all treated samples increased to more than 100 g/kg dry forage. This research strongly Suggests that AFEX-treated feedstuffs can be competitive with traditional forages, and thus offer expanded options for ruminant feeding. (C) 2009 Elsevier B.V. All rights reserved.
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