Document Detail

Determination of nutrient mass balance in turkeys.
MedLine Citation:
PMID:  19038802     Owner:  NLM     Status:  MEDLINE    
Retention and excretion of phosphorus and nitrogen were determined for turkeys fed 2 diets at 3 ages, via mass balance based on the nutrient content of consumed feed, carcasses, and litter. The 2 diets consisted of an industry diet (IND) and a low phosphorus + 600 U of phytase/kg (LP) diet. A subsample of birds was weighed and killed at 12, 15, and 18 wk of age for nutrient retention (via whole carcasses) and excretion (via litter). Diet did not affect BW or feed intake from 12 to 18 wk of age. The mass of phosphorus excreted from 0 to 12, 0 to 15, and 0 to 18 wk of age was 37, 46, and 40% greater for birds fed the IND diets compared with birds fed the LP diets. Phosphorus retained as the percentage of phosphorus consumed was greater at 12, 15, and 18 wk for birds fed the LP diets (67.0, 63.8, and 53.8%) than for birds fed the IND diets (47.3, 44.0, and 32.8%). The difference between the mass of phosphorus excreted, as calculated from litter, compared with feed intake minus carcass retention was less than 5% at 18 wk. The nitrogen retained averaged 90.7, 136.7, and 184.2 g/bird, whereas nitrogen excreted averaged 377.6, 620.7, and 921.8 g/bird at 12, 15, and 18 wk of age, respectively. Additionally, with an 18-wk average litter DM of 78.0%, the unaccounted for nitrogen at 18 wk was 427 and 405 g/bird for birds fed the IND and LP diets, respectively (40 and 37% of excreted nitrogen).
T Applegate; S Adedokun; W Powers; R Angel
Publication Detail:
Type:  Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Poultry science     Volume:  87     ISSN:  0032-5791     ISO Abbreviation:  Poult. Sci.     Publication Date:  2008 Dec 
Date Detail:
Created Date:  2008-11-28     Completed Date:  2009-02-11     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401150     Medline TA:  Poult Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2477-85     Citation Subset:  IM    
Department of Animal Sciences, Purdue University, West Lafayette, IN 47907-2054, USA.
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MeSH Terms
6-Phytase / metabolism
Age Distribution
Animal Feed / analysis
Animal Nutritional Physiological Phenomena
Diet / veterinary*
Nitrogen / metabolism
Phosphorus / metabolism
Turkeys / metabolism*
Reg. No./Substance:
7723-14-0/Phosphorus; 7727-37-9/Nitrogen; EC

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

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