Document Detail

Effects of increasing dietary concentrations of specific structured triacylglycerides on performance and nitrogen and energy metabolism in broiler chickens.
MedLine Citation:
PMID:  16641029     Owner:  NLM     Status:  MEDLINE    
Specific structured triacylglycerides (STG) containing medium chain fatty acids in sn-1,3 positions and a long chain fatty acid in sn-2 position were prepared from rapeseed oil and capric acid (C10:0). A total of 80 female broiler chickens (Ross 208) were randomly allocated into five dietary treatments as two series of 40 chicks: a basal diet with graded levels of STG of 0, 20, 40, 60 and 80 g/kg diet at the expense of rapeseed oil were fed to the chickens in groups of four. At 12 d of age the chickens were placed pair-wise in metabolism cages. The grower period (d 13-36) was divided into four consecutive balance periods each of 6 d. Two 24 h measurements of gas exchange in two open-air circuit respiration chambers were performed during the second and third day of each balance period. During the whole experiment there was a negative effect of the inclusion of STG on average feed intake. However, this only slightly affected average daily weight gain. Feed conversion efficiency improved linearly with the inclusion level of STG. Daily gain adjusted to mean daily feed intake increased linearly with inclusion rate of STG, indicating that the weight gain was affected by both feed intake and the enhancing effect on digestibility of STG. Weight of small intestine and colon decreased with increasing inclusion of STG. Utilisation of dietary protein relative to intake increased while that of retained fat tended to decrease resulting in a decreased utilisation of metabolisable energy (RE/ME) in birds receiving STG. Heat production (HE) was slightly lower in the STG groups. More of the dietary fat was oxidised when more STG was added, although the total amount of fat in the diets was kept constant.
C-T Zheng; H Jørgensen; C-E Høy; K Jakobsen
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  British poultry science     Volume:  47     ISSN:  0007-1668     ISO Abbreviation:  Br. Poult. Sci.     Publication Date:  2006 Apr 
Date Detail:
Created Date:  2006-04-27     Completed Date:  2006-07-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  15740290R     Medline TA:  Br Poult Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  180-9     Citation Subset:  IM    
Department of Animal Health, Welfare and Nutrition, Research Centre Foulum, Danish Institute of Agricultural Sciences, P.O. Box 50, DK-8830 Tjele, Denmark.
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MeSH Terms
Chickens / growth & development*,  metabolism*
Dietary Fats / administration & dosage,  analysis
Dose-Response Relationship, Drug
Energy Intake / drug effects,  physiology
Energy Metabolism / drug effects*,  physiology
Fatty Acids / chemistry*
Fatty Acids, Unsaturated / analysis,  chemistry*
Nitrogen / metabolism
Plant Oils
Random Allocation
Respiration / drug effects
Triglycerides / administration & dosage*,  chemistry
Weight Gain / drug effects,  physiology
Reg. No./Substance:
0/Dietary Fats; 0/Fatty Acids; 0/Fatty Acids, Unsaturated; 0/Plant Oils; 0/Triglycerides; 7727-37-9/Nitrogen; 8002-13-9/rapeseed oil

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