期刊
BIORESOURCE TECHNOLOGY
卷 186, 期 -, 页码 25-33出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.02.110
关键词
Buffering capacity; Dietary sulfur; Hydrogen sulfide; Methane; Sulfate reducing bacteria
资金
- Agriculture and Food Research Initiative Competitive from the USDA National Institute of Food and Agriculture [2012-67015-19437]
- China Scholarship Council
The effects of three types of dietary sulfur on in vitro fermentation characteristics, sulfide production, methane production, and microbial populations at two different buffer capacities were examined using in vitro rumen cultures. Addition of dry distilled grain with soluble (DDGS) generally decreased total gas production, degradation of dry matter and neutral detergent fiber, and concentration of total volatile fatty acids, while increasing ammonia concentration. High buffering capacity alleviated these adverse effects on fermentation. Increased sulfur content resulted in decreased methane emission, but total Archaea population was not changed significantly. The population of sulfate reducing bacteria was increased in a sulfur type-dependent manner. These results suggest that types of dietary sulfur and buffering capacity can affect rumen fermentation and sulfide production. Diet buffering capacity, and probably alkalinity, may be increased to alleviate some of the adverse effects associated with feeding DDGS at high levels. (C) 2015 Elsevier Ltd. All rights reserved.
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