Influence of Dietary calcium and Phosphorus Levels on the Performance and Bone Characteristics of Growing-Finishing Swine

Stockland, W. L.; Blaylock, L. G.

doi:10.2527/jas1973.374906x

Cited by 34 publications

(14 citation statements)

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“…Although muscle tissue contains the second largest P pool in the animal, little research has examined the effect of genetic background on the response of carcass characteristics and meat quality during dietary P restriction. Similar to previous studies (Cromwell et al, 1970;Stockland and Blaylock, 1973;O'Quinn et al, 1997;Shelton et al, 2004), the present study did not observe an effect of P deprivation on carcass characteristics with the exception of BW, HCW, and carcass FFL percentage. Interestingly, even in slight P deficiency, pigs fed the PD diet tended to have greater 10th-rib backfat and smaller LM area when compared with their PA-fed counterparts.…”

Section: Discussionsupporting

confidence: 79%

Response to dietary phosphorus deficiency is affected by genetic background in growing pigs1

Alexander

Cutler

et al. 2008

Journal of Animal Science

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Concern over the environmental effect of P excretion from pig production has led to reduced dietary P supplementation. To examine how genetics influence P utilization, 94 gilts sired by 2 genetic lines (PIC337 and PIC280) were housed individually and fed either a P-adequate diet (PA) or a 20% P-deficient diet (PD) for 14 wk. Initially and monthly, blood samples were collected and BW recorded after an overnight fast. Growth performance and plasma indicators of P status were determined monthly. At the end of the trial, carcass traits, meat quality, bone strength, and ash percentage were determined. Pigs fed the PD diet had decreased (P < 0.05) plasma P concentrations and poorer G:F (P < 0.05) over the length of the trial. After 4 wk on trial, pigs fed the PD diet had increased (P < 0.05) plasma 1,25(OH) 2 D 3 and decreased (P < 0.05) plasma parathyroid hormone compared with those fed the PA diet. At the end of the trial, pigs fed the PD diet had decreased (P < 0.05) BW, HCW, and percentage fat-free lean and tended to have decreased LM area (P = 0.06) and marbling (P= 0.09) and greater (P = 0.12) 10th-rib backfat than pigs fed the PA diet. Additionally, animals fed the PD diet had weaker bones and also decreased (P < 0.05) ash percentage and increased (P < 0.05) concentrations of 1α-hydroxylase and parathyroid hormone receptor mRNA in kidney tissue. Regardless of dietary treatment, PIC337-sired pigs consumed more feed and gained more BW than their PIC280-sired counterparts (P < 0.05) during the study. The PIC337-sired pigs also had greater (P < 0.05) HCW, larger (P < 0.01) LM area, and tended to have (P = 0.07) greater dressing percentage. Meat from the PIC337-sired pigs also tended to have greater (P = 0.12) concentrations of lactate but decreased (P = 0.07) concentrations of total glucose units 24 h postslaughter. Although plasma 1,25(OH) 2 D 3 concentrations were elevated (P < 0.05) in all the animals fed the PD diet, this elevation due to P deficiency tended (P = 0.09) to be greater in the PIC337-sired pigs after 12 wk on the treatment. The PIC337-sired pigs had stronger (P < 0.01) bones with greater ash percentage than the PIC280-sired pigs. The difference in the strength of the radii between the PIC337-sired pigs fed the PA and PD diets was greater than their PIC280-sired counterparts, which resulted in sire line × treatment interactions (P < 0.05). These data indicate differing mechanisms of P utilization between these genetic lines. Elucidating these mechanisms may lead to strategies to increase efficiency of growth in a more environmentally friendly manner. RightsWorks produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted. ABSTRACT: Concern over the environmental effect of P excretion from pig production has led to reduced dietary P supplementation. To examine how genetics influence P utilization, 94 gilts sired by 2 genetic lines (PIC337 and PIC280) were housed individually and fed either a...

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Section: Discussionsupporting

confidence: 79%

Response to dietary phosphorus deficiency is affected by genetic background in growing pigs1

Alexander

Cutler

et al. 2008

Journal of Animal Science

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“…) Histological findings in pigs have suggested that a low Ca : P ratio (0.5) induces an increase in parathyroid activity as compared with that observed using a normal Ca : P ratio (1.2) (Nunez, Krook and Whalen, 1976) ; this agrees with a previous observation of Doige, Owen and Mills (1975). In contrast, we found no rise in plasma PTH level with a Ca-P ratio of 0.5 (Pointillart, Garel and Gu6guen, 1978b) (Doige et a/., 1975 ;Horvath and Papp, 1972 ;Stockland and Blaylock, 1973) (Chen, Toribara and Warner, 1956). …”

supporting

confidence: 90%

“…Our experiments in pigs led to the conclusion that CT secretion is more sensitive than PTH secretion to changes in plasma calcium level. Care et al (1968) (Horvath and Papp, 1972 ;Doige, Owen and Mills, 1975 ;Stockland and Blaylock, 1973 Doige, Owen and Mills (1975) In pigs we must also emphasize the importance of the relationships between the plasma concentrations of magnesium and CT already observed (Pointillart, Garel and Gu6guen, 1978b). In the present experiments, during the control period and the last period of the low calcium diet, an inverse relationship was established between magnesemia and plasma CT levels.…”

mentioning

confidence: 66%

Plasma calcitonin and parathyroid hormone levels in growing pigs on different diets. II. Low calcium diet

Pointillart¹,

Garel²,

Guéguen³

et al. 1979

Ann. Biol. anim. Bioch. Biophys.

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Our data seemed to confirm that CT in this species might play a more important role than PTH in plasma calcium regulation. Special attention has been given to the role of plasma magnesium in CT-PTH relationships.Introdudion.In lactating cows the marked hypocalcemia occurring during parturient paresis is associated with elevated values of plasma parathyroid hormone (PTH) (Blum, Mayer and Potts, 1974 ;Blum et al., 1974 ;Garel and Barlet, 1975). A rise in plasma PTH levels is also observed after intravenous infusion of EGTA or EDTA in cows (Blum and Fischer, 1975 ;Sherwood et al., 1966 ;Saeki and Hayashi, 1976). However,

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“…Similarly, Stockland & Blaylock (1973), Weeden et al (1993), O'Quinn et al (1997), and Carter & Cromwell (1998b) found no effect of phosphorus on loin eye area. However, Cromwell et al (1970) reported an increase in loin eye area by increasing the level of phosphorus in the diet of pigs from 18 to 93 kg.…”

Section: Resultsmentioning

confidence: 80%

Available phosphorus levels for 95 to 120 kg barrows genetically selected for lean gain

Arouca¹,

Silva

Fontes³

et al. 2012

R. Bras. Zootec.

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Influence of Dietary calcium and Phosphorus Levels on the Performance and Bone Characteristics of Growing-Finishing Swine

Cited by 34 publications

References 0 publications

Response to dietary phosphorus deficiency is affected by genetic background in growing pigs1

Response to dietary phosphorus deficiency is affected by genetic background in growing pigs1

Plasma calcitonin and parathyroid hormone levels in growing pigs on different diets. II. Low calcium diet

Available phosphorus levels for 95 to 120 kg barrows genetically selected for lean gain

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