Document Detail

Effects of porcine somatotropin and dietary phosphorus on growth performance and bone properties of gilts.
MedLine Citation:
PMID:  8226368     Owner:  NLM     Status:  MEDLINE    
One hundred eight gilts (initial weight = 58.5 kg) were used to determine the effects of porcine somatotropin (pST) and dietary P on growth performance and bone mechanical properties and mineralization during the finishing phase (58 to 105 kg) and a 35-d postfinishing phase. Gilts were injected daily with placebo (control) or 4 mg of pST and fed diets containing .4, .8, or 1.2% P in a 2 x 3 factorial arrangement. From 58 to 105 kg, administration of pST increased (P < .01) ADG and G/F and decreased (P < .01) ADFI. When mean weight of the gilts in a pen reached 105 kg, half the gilts were slaughtered and first rib, femur, and third and fourth metacarpals were collected for determination of mechanical properties and bone ash. A pST x P interaction was observed (P < .05) for rib bending moment and modulus of elasticity; maximum rib bending moment was attained by control gilts at .8% P and rib modulus of elasticity values remained constant across P levels, whereas rib bending moment and modulus of elasticity increased as dietary P increased from .4 to 1.2% in pST-treated gilts. Administration of pST decreased (P < .05) stress of the rib, femur, and metacarpals compared with control gilts. Increasing dietary P resulted in a linear (P < .10) increase in bending moment, stress, and ash content for rib, femur, and metacarpal bones. The remaining 54 gilts were individually fed 1.8 kg/d of a common diet for 35 d postfinishing.(ABSTRACT TRUNCATED AT 250 WORDS)
T L Weeden; J L Nelssen; R D Goodband; J A Hansen; G E Fitzner; K G Friesen; J L Laurin
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of animal science     Volume:  71     ISSN:  0021-8812     ISO Abbreviation:  J. Anim. Sci.     Publication Date:  1993 Oct 
Date Detail:
Created Date:  1993-12-21     Completed Date:  1993-12-21     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  8003002     Medline TA:  J Anim Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  2674-82     Citation Subset:  IM; S    
Department of Animal Sciences and Industry, Kansas State University, Manhattan 66506-0201.
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MeSH Terms
Alkaline Phosphatase / blood
Bone and Bones / drug effects*,  physiology
Calcification, Physiologic / drug effects*
Calcium / blood
Calcium, Dietary / administration & dosage
Growth Hormone / pharmacology*
Meat / standards
Phosphorus / blood
Phosphorus, Dietary / administration & dosage,  pharmacology*
Random Allocation
Swine / growth & development*,  physiology
Weight Gain / drug effects
Reg. No./Substance:
0/Calcium, Dietary; 0/Phosphorus, Dietary; 7440-70-2/Calcium; 7723-14-0/Phosphorus; 9002-72-6/Growth Hormone; EC Phosphatase

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