Determination of ether extract digestibility and energy content of specialty lipids with different fatty acid and free fatty acid content, and the effect of lecithin, for nursery pigs1
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- 作者：B.J. Kerr* ; brian.kerr@ars.usda.gov ; G.C. Shurson&dagger ;
- 关键词：digestibility ; energy ; lipid ; nursery pig
- 刊名：The Professional Animal Scientist
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：33
- 期：1
- 页码：127-134
- 全文大小：299 K
- 卷排序：33
文摘
Various specialty lipids are commercially available and used in nursery pig diets but may have fatty acid profiles and FFA content that affect their caloric value. In each of 2 experiments, 54 barrows (28 d of age) were fed a common diet for 7 d, allotted to dietary treatments, and fed their respective experimental diets for an additional 17 d followed by a 4-d total fecal and urine collection period to determine DE, ME, and ether extract (EE) digestibility of various lipid products or lipid-lecithin combinations. In Exp. 1, 5 sources of specialty lipid products were evaluated. Small differences in DE and apparent total-tract digestibility of EE were observed among these products, with the product containing high FFA derived from animal fat having greatest DE, ME, and apparent total-tract digestibility of EE (P < 0.05). In Exp. 2, a refined soybean oil (SO) and a SO containing high FFA content (SO-FFA) were fed with or without a de-oiled soybean-based lecithin (LEC). There was an interaction between lipid source and lecithin where LEC decreased DE, DE as a percentage of GE, and ME when included with SO-FFA, but not when added to SO (P < 0.01). When no LEC was added, there was no difference in energy or EE digestibility between SO-FFA and SO. In conclusion, the specialty lipid products evaluated were poorly digested, the addition of LEC to SO or SO-FFA did not improve lipid or energy digestibility, and the presence of high FFA in SO did not negatively affect lipid or energy digestibility.