Technical Note: Assessment of two methods for estimating bone ash in pigs

Abstract Data from three experiments conducted to evaluate the effects of increasing available P in swine diets were used to compare two different bone processing methods. Our objective was to determine if the procedures influenced treatment differences and the ability to detect changes in the perce...

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Veröffentlicht in:Journal of animal science 2020-08, Vol.98 (8)
Hauptverfasser: Wensley, Madie R, Vier, Carine M, Gebhardt, Jordan T, Tokach, Mike D, Woodworth, Jason C, Goodband, Robert D, DeRouchey, Joel M
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container_issue 8
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container_title Journal of animal science
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creator Wensley, Madie R
Vier, Carine M
Gebhardt, Jordan T
Tokach, Mike D
Woodworth, Jason C
Goodband, Robert D
DeRouchey, Joel M
description Abstract Data from three experiments conducted to evaluate the effects of increasing available P in swine diets were used to compare two different bone processing methods. Our objective was to determine if the procedures influenced treatment differences and the ability to detect changes in the percentage bone ash. In each experiment, pigs (nursery pigs in experiments 1 and 2, and finishing pigs in experiment 3) were fed a wide range of available phosphorus levels provided from either increasing monocalcium P or added phytase. At the completion of each experiment, a subset of pigs was euthanized, and either fibulas (experiments 1 and 2) or metacarpals (experiment 3) were collected to determine the percentage bone ash. Bones were processed by cleaning away all soft tissues followed by ether extraction for 7 d (defatted), or no lipid extraction (non-defatted), and then ashed. In nursery and finishing pigs, defatted bones had increased (P < 0.001) percentage bone ash compared with non-defatted bones. No evidence of a method × treatment interaction or linear and quadratic interactions were observed in bone ash weight and percentage bone ash (P > 0.10) for nursery pigs; however, a linear interaction was detected (P < 0.05) in percentage bone ash for grow-finish pigs. This response was minimal and likely due to increased variation observed in grow-finish pigs when bones were not defatted. The processing method did not affect the ability to detect differences among treatments as a result of changing dietary P concentrations in the nursery or grow-finish pigs. In summary, either non-defatted or defatted bone processing methods can be used to determine bone ash weight and percentage bone ash as a way to assess bone mineralization and dietary treatment differences in nursery pigs; however, the increased variation observed in mature pigs suggests that defatted bone processing is the preferred method for grow-finish pigs.
doi_str_mv 10.1093/jas/skaa251
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Our objective was to determine if the procedures influenced treatment differences and the ability to detect changes in the percentage bone ash. In each experiment, pigs (nursery pigs in experiments 1 and 2, and finishing pigs in experiment 3) were fed a wide range of available phosphorus levels provided from either increasing monocalcium P or added phytase. At the completion of each experiment, a subset of pigs was euthanized, and either fibulas (experiments 1 and 2) or metacarpals (experiment 3) were collected to determine the percentage bone ash. Bones were processed by cleaning away all soft tissues followed by ether extraction for 7 d (defatted), or no lipid extraction (non-defatted), and then ashed. In nursery and finishing pigs, defatted bones had increased (P &lt; 0.001) percentage bone ash compared with non-defatted bones. No evidence of a method × treatment interaction or linear and quadratic interactions were observed in bone ash weight and percentage bone ash (P &gt; 0.10) for nursery pigs; however, a linear interaction was detected (P &lt; 0.05) in percentage bone ash for grow-finish pigs. This response was minimal and likely due to increased variation observed in grow-finish pigs when bones were not defatted. The processing method did not affect the ability to detect differences among treatments as a result of changing dietary P concentrations in the nursery or grow-finish pigs. In summary, either non-defatted or defatted bone processing methods can be used to determine bone ash weight and percentage bone ash as a way to assess bone mineralization and dietary treatment differences in nursery pigs; however, the increased variation observed in mature pigs suggests that defatted bone processing is the preferred method for grow-finish pigs.</description><identifier>ISSN: 0021-8812</identifier><identifier>EISSN: 1525-3163</identifier><identifier>DOI: 10.1093/jas/skaa251</identifier><identifier>PMID: 32770248</identifier><language>eng</language><publisher>US: Oxford University Press</publisher><subject>Non Ruminant Nutrition</subject><ispartof>Journal of animal science, 2020-08, Vol.98 (8)</ispartof><rights>The Author(s) 2020. Published by Oxford University Press on behalf of the American Society of Animal Science. All rights reserved. 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No evidence of a method × treatment interaction or linear and quadratic interactions were observed in bone ash weight and percentage bone ash (P &gt; 0.10) for nursery pigs; however, a linear interaction was detected (P &lt; 0.05) in percentage bone ash for grow-finish pigs. This response was minimal and likely due to increased variation observed in grow-finish pigs when bones were not defatted. The processing method did not affect the ability to detect differences among treatments as a result of changing dietary P concentrations in the nursery or grow-finish pigs. 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No evidence of a method × treatment interaction or linear and quadratic interactions were observed in bone ash weight and percentage bone ash (P &gt; 0.10) for nursery pigs; however, a linear interaction was detected (P &lt; 0.05) in percentage bone ash for grow-finish pigs. This response was minimal and likely due to increased variation observed in grow-finish pigs when bones were not defatted. The processing method did not affect the ability to detect differences among treatments as a result of changing dietary P concentrations in the nursery or grow-finish pigs. 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source Oxford University Press Journals All Titles (1996-Current); Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; PubMed Central
subjects Non Ruminant Nutrition
title Technical Note: Assessment of two methods for estimating bone ash in pigs
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