Document Detail

Utilization of phytate and nonphytate phosphorus in chicks as affected by source and amount of vitamin D3.
MedLine Citation:
PMID:  9374314     Owner:  NLM     Status:  MEDLINE    
Commercial and laboratory-strain crossbred chicks responded (P < .01) markedly to 1alpha-hydroxycholecalciferol (1alpha-OH D3) during the 2nd and 3rd wk of life. Bone-ash responses exceeded 50% when this compound was added at 20 microg/kg to phosphorus (P)-deficient corn-soybean meal diets containing surfeit levels (25 microg/kg) of cholecalciferol (D3). Phosphorus excretion was decreased (P < .01) and, thus, retention was increased (P < .01) when 1alpha-OH D3 was supplemented. A P-deficient (.10% P) casein-amino acid purified diet, devoid of D3, was used to determine whether 15 microg/kg of D3 was sufficient to facilitate optimal absorption of the nonphytate P contained in this diet. Bone ash responded to .075% P addition (KH2PO4), and chicks fed diets with .175% nonphytate P exhibited further bone-ash responses to 15 microg/kg of D3 or 10 microg/kg 1alpha-OH D3. Higher levels of either of these D3 compounds did not produce additional responses. This suggested that 15 to 25 microg/kg of D3 in a P-deficient corn-soybean meal diet (.28% phytate P and .14% nonphytate P) is more than adequate to facilitate optimal absorption of the nonphytate P present in the diet. A P-deficient casein-dextrose diet (.13% nonphytate P and 15 microg/kg D3) was fed in the final chick assay, and chicks fed this diet did not show bone ash responses to 1alpha-OH D3 or to microbial-derived phytase (1,470 units/kg). Thus, with P-deficient corn-soybean meal diets containing at least 15 microg D3/kg, 1alpha-OH D3 supplementation markedly increased weight gain and bone ash because it increased the utilization of phytate P.
R R Biehl; D H Baker
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of animal science     Volume:  75     ISSN:  0021-8812     ISO Abbreviation:  J. Anim. Sci.     Publication Date:  1997 Nov 
Date Detail:
Created Date:  1998-01-27     Completed Date:  1998-01-27     Revised Date:  2013-05-27    
Medline Journal Info:
Nlm Unique ID:  8003002     Medline TA:  J Anim Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  2986-93     Citation Subset:  IM    
Department of Animal Sciences, University of Illinois, Urbana 61801, USA.
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MeSH Terms
Chickens / metabolism*,  physiology
Cholecalciferol / analysis,  pharmacology*
Diet / veterinary
Dose-Response Relationship, Drug
Hydroxycholecalciferols / analysis,  pharmacology
Minerals / metabolism
Phosphorus / analysis,  metabolism,  pharmacokinetics*
Phosphorus, Dietary / analysis,  metabolism,  pharmacology
Phytic Acid / analysis,  metabolism,  pharmacokinetics*
Random Allocation
Soybeans / chemistry,  metabolism
Tibia / metabolism
Weight Gain / drug effects,  physiology
Zea mays / chemistry,  metabolism
Reg. No./Substance:
0/Hydroxycholecalciferols; 0/Minerals; 0/Phosphorus, Dietary; 67-97-0/Cholecalciferol; 68439-86-1/bone ash; 7723-14-0/Phosphorus; 83-86-3/Phytic Acid; URQ2517572/alfacalcidol

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

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