Document Detail

Effects of lecithin and corn oil on site of digestion, ruminal fermentation and microbial protein synthesis in sheep.
MedLine Citation:
PMID:  2312434     Owner:  NLM     Status:  MEDLINE    
Six Hampshire wethers with ruminal and duodenal cannulas were fed three diets in a replicated 3 X 3 latin square to compare phospholipids with triglycerides for their effects on ruminal digestion. The diets (56% concentrate, 44% bermuda-grass hay, air-dried basis) contained either no added fat (control), 5.2% soybean lecithin or 2.4% corn oil on a DM basis. All diets were isonitrogenous and both fat-supplemented diets had similar fatty acid and energy contents. Fat added to the diet, regardless of source, reduced digestibilities of DM, energy, ADF and fatty acids in the rumen but had no effect on total tract digestibility coefficients. Lecithin slightly increased (P = .06) fatty acid digestion in the hindgut compared to corn oil (91.0 and 87.0%, respectively). Both fat sources decreased (P less than .01) ruminal ammonia concentration and increased (P less than .10) N flow to the duodenum. Added fat also reduced ruminal (P less than .01) and total tract (P less than .05) N digestibilities. Microbial N flow to the hindgut was not affected by diet, but adding fat increased (P less than .06) true efficiency of microbial protein synthesis. Overall, phospholipids from soybean lecithin inhibited ruminal fermentation similarly to triglycerides from corn oil. Despite ruminal degradation of lecithin by microbial phospholipases as shown in other studies, feeding lecithin tended to increase fatty acid digestion in the hindgut.
T C Jenkins; N Fotouhi
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of animal science     Volume:  68     ISSN:  0021-8812     ISO Abbreviation:  J. Anim. Sci.     Publication Date:  1990 Feb 
Date Detail:
Created Date:  1990-04-19     Completed Date:  1990-04-19     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8003002     Medline TA:  J Anim Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  460-6     Citation Subset:  IM    
Dept. of Anim. Sci., Clemson University, SC 29634.
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MeSH Terms
Bacterial Proteins / biosynthesis
Corn Oil / metabolism*
Dietary Fats / metabolism
Phosphatidylcholines / metabolism*
Phospholipids / metabolism
Plant Oils / metabolism*
Protozoan Proteins / biosynthesis
Rumen / metabolism*
Sheep / metabolism*
Triglycerides / metabolism
Reg. No./Substance:
0/Bacterial Proteins; 0/Dietary Fats; 0/Phosphatidylcholines; 0/Phospholipids; 0/Plant Oils; 0/Protozoan Proteins; 0/Triglycerides; 8001-30-7/Corn Oil

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