Document Detail


Effects of coextrusion of flaxseed and field pea on the digestibility of energy, ether extract, fatty acids, protein, and amino acids in grower-finisher pigs.
MedLine Citation:
PMID:  18599674     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The objectives of this study were to determine the ileal and total tract digestibility of individual fatty acids, ether extract, energy, protein, and AA in a mix of flax and field pea (FP) and to determine whether extrusion improves the nutritive value of this mix. Five barrows (23-kg initial BW) fitted with a T-cannula at the distal ileum were fed 5 diets at 3 times the maintenance energy requirement according to a 5 x 5 Latin square design: a wheat and soybean meal control diet and 4 diets containing 30% raw or coextruded FP plus 70% control diet and chromic oxide as an indigestible marker. The 4 extrusion treatments included the following: 1) FP0, ground, nonextruded; 2) FP1, single-screw extruded; 3) FP2, twin-screw extruded with low intensity (screw speed 120 rpm; die temperature 110 degrees C; water input 5 kg/h); and 4) FP3, twin-screw extruded with high intensity (300 rpm; 125 degrees C; 11 kg/h). The ether extract concentration was 17.8, 19.6, 17.7, and 17.3% (as fed) in FP0, FP1, FP2, and FP4, respectively. The ADF concentration was 13.2, 11.1, 11.4, and 13.7% (as fed) in FP0, FP1, FP2, and FP4, respectively. After a 7-d acclimation, feces were collected for 2 d, and then ileal digesta was collected for 2 d. Energy digestibility in the test ingredients was calculated using the difference method. Extrusion of FP did not affect the apparent total tract digestibility (ATTD) and apparent ileal digestibility (AID) of DM, OM, and CP for grower-finisher pigs. Extrusion increased (P < 0.05) the ATTD of GE and ether extract and the DE content of FP, and the AID of the Arg, Ile, Leu, Lys, Phe, Thr, and Val, and total fatty acids. Extrusion tended to increase (P < 0.10) the AID of linolenic acid. Single-screw extrusion resulted in a greater (P < 0.05) ATTD of GE, OM, ether extract, and DE content of FP and AID of SFA than twin-screw extrusion. Single-screw extrusion resulted in a trend for greater (P < 0.10) AID of linolenic acid and total fatty acids than twin-screw extrusion. Twin-screw extrusion at high intensity resulted in less (P < 0.05) AID of SFA than twin-screw extrusion at low intensity, indicating that equipment and conditions should be carefully controlled for the extrusion of FP. In conclusion, coextrusion of FP increased digestibility of ether extract, fatty acids, energy, and AA.
Authors:
J K Htoo; X Meng; J F Patience; M E R Dugan; R T Zijlstra
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-07-03
Journal Detail:
Title:  Journal of animal science     Volume:  86     ISSN:  1525-3163     ISO Abbreviation:  J. Anim. Sci.     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-10-28     Completed Date:  2009-01-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8003002     Medline TA:  J Anim Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2942-51     Citation Subset:  IM    
Affiliation:
Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta, Canada, T6G 2P5.
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MeSH Terms
Descriptor/Qualifier:
Amino Acids / analysis,  metabolism
Animal Feed / analysis
Animal Nutritional Physiological Phenomena*
Animals
Diet / veterinary*
Digestion / physiology*
Fatty Acids / analysis,  metabolism
Flax / metabolism*
Gastrointestinal Tract / metabolism
Ilium / metabolism
Male
Peas / metabolism*
Random Allocation
Swine / metabolism*
Chemical
Reg. No./Substance:
0/Amino Acids; 0/Fatty Acids

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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