期刊
LIVESTOCK SCIENCE
卷 134, 期 1-3, 页码 198-201出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.livsci.2010.06.140
关键词
Chitosan; Lactobacilli; Enterobacteria; VFA; Manure odour
The hypothesis of this study is that supplementation of a high crude protein (CP), wheat-based diet with chitosan may increase protein-fermenting bacteria in the large intestine at the expense of carbohydrate-fermenting bacteria, resulting in increased manure odour emissions. A 2 x 2 factorial experiment was conducted to investigate the effect of dietary chitosan inclusion (0 vs 20 g/kg) and CP concentration (200 vs 150 g/kg) on intestinal microflora, volatile fatty acid concentrations (VFA) and manure odour from finisher boars. The inclusion of chitosan decreased Lactobacilli and increased Enterobacteriaceae in the caecum (P<0.05) and colon (P<0.001) compared with pigs offered unsupplemented diets. Dietary chitosan decreased the molar proportion of butyric acid and increased valeric acid in the caecum (P<0.05) and colon (P<0.001) compared with unsupplemented diets. Dietary chitosan increased manure odour emissions (P<0.05) at 72 h post excretion. In conclusion, dietary chitosan decreased Lactobacilli and increased Enterobacteriaceae in the hind gut and subsequently increased manure odour emissions. (C) 2010 Elsevier B.V. All rights reserved.
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