EurekaMag.com logo
+ Site Statistics
References:
53,517,315
Abstracts:
29,339,501
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Soybean oil supplementation of a high-concentrate diet does not affect site and extent of organic matter, starch, neutral detergent fiber, or nitrogen digestion, but influences both ruminal metabolism and intestinal flow of fatty acids in limit-fed lambs



Soybean oil supplementation of a high-concentrate diet does not affect site and extent of organic matter, starch, neutral detergent fiber, or nitrogen digestion, but influences both ruminal metabolism and intestinal flow of fatty acids in limit-fed lambs



Journal of Animal Science 82(10): 2985-2994



Our objective was to measure ruminal fermentation characteristics and site and extent of nutrient digestion in sheep limit-fed an 81.6% (DM basis) concentrate diet supplemented with increasing levels of soybean oil. Eight white-faced wether lambs (39.9 +/- 3.0 kg BW) fitted with ruminal, duodenal, and ileal cannulas were used in a replicated 4 x 4 Latin square experiment. Diets were formulated to contain 15.0% CP (DM basis) and included bromegrass hay (18.4%), cracked corn, soybean oil, corn gluten meal, urea, and limestone. Soybean oil was added to diets at 0, 3.2, 6.3, and 9.4% of dietary DM. The diet was limit-fed at 1.4% of BW. After 14 d of dietary adaptation, Cr2O3 (2.5 g) was dosed at each feeding for 7 d followed by ruminal, duodenal, ileal, and fecal sample collections for 3 d. Digestibilities of OM, starch, NDF, and N were not affected (P = 0.13 to 0.95) by increasing dietary soybean oil level. Means for true ruminal (percentage of intake), lower-tract (percentage entering the duodenum), and total-tract (percentage of intake) digestibility for each nutrient were (mean +/- SEM): OM = 50.7 +/- 4.66%, 71.6 +/- 2.58%, and 82.7 +/- 0.93%; starch = 92.0 +/- 1.94%, 96.1 +/- 0.70%, and 99.8 +/- 0.05%; NDF = 36.7 +/- 6.75%, 50.9 +/- 7.58%, and 71.7 +/- 1.93%; and N = 31.6 +/- 9.93%, 84.1 +/- 1.50%, and 81.0 +/- 1.10%, respectively. Total VFA concentration was greatest in sheep fed 6.3% soybean oil and least in sheep fed 9.4% soybean oil (cubic, P = 0.01). Duodenal flow of fatty acids from the diet and those metabolized within the rumen increased (linear, P < 0.001) with increasing dietary soybean oil level. Ileal flow of 16:0, 17:0, 18:0, 18:1trans, and 18:1cis-9 fatty acids increased (P less than or equal to 0.04) with increasing dietary soybean oil level. Apparent small intestinal disappearance of 18:0 decreased (linear, P = 0.004) as dietary soybean oil increased, and with 9.4% dietary soybean oil, nearly half the duodenal 18:0 was observed at the ileum; thus, the true energy value of the soybean oil decreased with increasing oil supplementation. We conclude that supplementation of a high-concentrate diet with increasing amounts of soybean oil in limit-fed sheep resulted in a trade off between loss of potential dietary energy from the fat and gain of important PUFA and biohydrogenation intermediates, but without a marked influence on digestibility of other important macronutrients.

(PDF 0-2 workdays service: $29.90)

Accession: 004323833

Download citation: RISBibTeXText

PMID: 15484951



Related references

Site and extent of digestion, duodenal flow, and intestinal disappearance of total and esterified fatty acids in sheep fed a high-concentrate diet supplemented with high-linoleate safflower oil. Journal of Animal Science 84(2): 387-396, 2006

The effects of forage proportion and rapidly degradable dry matter from concentrate on ruminal digestion in dairy cows fed corn silage-based diets with fixed neutral detergent fiber and starch contents. Journal of Dairy Science 93(2): 666-681, 2010

Evaluation of ruminal, intestinal and total digestion of the organic matter, crude protein in bovine rations neutral detergent fiber. Acta Scientiarum 24(4): 1053-1058, 2002

Effects of saturation and esterification of fat sources on site and extent of digestion in steers: ruminal fermentation and digestion of organic matter, fiber, and nitrogen. Journal of Animal Science 75(10): 2803-2812, 1997

Site and extent of starch and neutral detergent fiber digestion as affected by source of calcium and level of corn. Journal of Animal Science 60(5): 1330-1337, 1985

Quantifying ruminal digestion of organic matter and neutral detergent fiber using the omasal sampling technique in cattle--a meta-analysis. Journal of Dairy Science 93(7): 3203-3215, 2010

Changes in ruminal and intestinal digestion during and after weaning in dairy calves fed concentrate diets containing pea or soya bean meal. 1. Digestion of organic matter and nitrogen. Livestock Production Science 24(2): 129-142, 1990

Ruminal degradability of the neutral detergent fiber and neutral detergent insoluble nitrogen of the corn silage and soybean meal in Nellore cattle. Revista Brasileira de Zootecnia 26(3): 608-615, May-June, 1997

Site and extent of neutral detergent fiber digestion, efficiency of ruminal digesta flux and fecal output as related to variations in voluntary intake and chewing behavior in heifers. Journal of Animal Science 66(10): 2678-2686, 1988

Influence of dairy biomass as a protein source on site and extent of digestion ruminal ammonia and plasma urea nitrogen in lambs fed concentrate diets. Journal Of Animal Scienceppl. 1: 507-508, 1988

Effects of ruminal protein degradability and frequency of supplementation on site and extent of digestion and ruminal fermentation characteristics in lambs fed low-quality forage. Journal of Animal Science 88(2): 718-726, 2010

Influence of grass maturity and diet on ruminal dry matter and neutral detergent fibre digestion kinetics. Archiv für Tierernahrung 47(2): 153-167, 1994

Effects of extrusion and ionophore addition on ruminal starch digestion and duodenal flow of long-chain fatty acids in ewes fed diets containing soybean oil. Journal of Animal Science 77(SUPPL 1): 116, 1999

Effects of barley starch and dry matter intake levels on rate site and extent of digestion in sheep fed a high energy diet. Journal of Animal Science 69(SUPPL 1): 538, 1991