The Influence of Tallow on Rumen Metabolism, Microbial Biomass Synthesis and Fatty Acid Composition of Bacteria and Protozoa
The Influence of Tallow on Rumen Metabolism, Microbial Biomass Synthesis and Fatty Acid Composition of Bacteria and Protozoa
复制标题
牛脂对细菌和原生动物瘤胃代谢、微生物量合成及脂肪酸组成的影响
DOI：
10.1080/09064709209410121
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
T. Hvelplund
中科院分区：
文献类型：
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作者：
M. Weisbjerg;C. Børsting;T. Hvelplund
研究了在低饲料水平（L0、L4、L6）和高饲料水平（H0、H2、H4、H6）分别添加0、4、6%和0、2、4、6%牛脂的干物质采食量水平（L、8.6 kg DM和H、12.6 kg DM）下，泌乳奶牛瘤胃代谢、微生物生物量合成和微生物长链脂肪酸组成。添加脂肪对纤维消化率无显著影响。饲粮中脂肪水平的提高降低了瘤胃总VFA浓度、乙酸/丙酸比和氨浓度。细菌和原生动物干物质中的粗脂肪和脂肪酸含量随着牛脂水平的增加而增加，特别是由于饲料中脂肪酸的增加。在高饲料水平下，中等脂肪采食量的瘤胃微生物合成和氨基酸向十二指肠的流量最高。
Abstract Rumen metabolism, microbial biomass synthesis and microbial long chain fatty acid composition were studied in lactating cows fed at two levels of dry matter intake (L, 8.6 kg DM and H, 12.6 kg DM) with 0, 4 and 6% added tallow at the low feed level (L0, L4 and L6) and 0, 2, 4 and 6% at the high feed level (H0, H2, H4 and H6). Fibre digestibility was not significantly affected by tallow addition. Increasing tallow level in the diet decreased the total VFA concentration, the ratio of acetic acid to propionic acid and the ammonia concentration in the rumen. Crude fat and fatty acid content in bacterial and protozoal dry matter increased with increased tallow level, especially due to an increase in fatty acids originating from the feeds. Microbial synthesis in the rumen and flow of amino acids to the duodenum was highest for medium fat intake at the high feed level.