The Relative Biological Value of Feed Phosphates for Chicks

Nelson, T. S.; Kirby, L. K.; Johnson, Z. B.

doi:10.3382/ps.0690113

Cited by 20 publications

(6 citation statements)

References 8 publications

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“…The MSP was not a commercial inorganic phosphate used for animals, but has often been used as a reference standard in animal experiments when the value of relative bioavailability of other P sources is determined (Nelson et al . ; Jongbloed et al . ; Cromwell ; Eeckhout & de Paepe ; Petersen et al .…”

Section: Discussionmentioning

confidence: 99%

Standardized total tract digestibility of phosphorus in various inorganic phosphates fed to growing pigs

Kwon

Kim

2017

Animal Science Journal

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An experiment was conducted to determine the standardized total tract digestibility (STTD) of phosphorus (P) in five sources of inorganic phosphate fed to growing pigs, including dicalcium phosphate (DCP), monodicalcium phosphate (MDCP), monocalcium phosphate (MCP), tricalcium phosphate (TCP) and monosodium phosphate (MSP, reagent grade). Six barrows (42.4 ± 1.1 kg) individually housed in metabolism crates were allotted to a 6 × 6 Latin square design with six dietary treatments and six periods. Each experimental period consisted of a 4 day adaptation period and a 5 day collection period. The five experimental diets contained 0.24 to 0.34% of P from each inorganic phosphate as a sole source of P. A P-free diet was also prepared to estimate the basal endogenous loss of P. The STTD of P in MSP (94.9%) was not different from the STTD of P in MCP (93.0%), but was greater (P < 0.05) than that in DCP, MDCP and TCP (87.0, 86.5 and 71.3%, respectively). In conclusion, digestibility of P in reagent-grade MSP was greater than that in feed-grade inorganic phosphates such as DCP, MDCP and TCP, and digestibility of P in DCP and MDCP was greater than that in the TCP.

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Section: Discussionmentioning

confidence: 99%

Standardized total tract digestibility of phosphorus in various inorganic phosphates fed to growing pigs

Kwon

Kim

2017

Animal Science Journal

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“…Most studies have shown that the P in DFP is slightly less available than that in commercial dicalcium phosphate for the chick (Peeler, 1972;Nelson et al, 1990) and the pig (Plumlee et al, 1958;Peeler, 1972;Cromwell et al, 19871, although some studies have shown the P in DFP and dicalcium phosphate to ET AL. be equally available (Hagemeier et al, 1981;Potter, 1988).…”

Section: Discussionmentioning

confidence: 99%

Biological availability of phosphorus in defluorinated phosphates with different phosphorus solubilities in neutral ammonium citrate for chicks and pigs

Coffey

Mooney

Cromwell

et al. 1994

Journal of Animal Science

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Two experiments were conducted to assess the bioavailability of P in five sources of defluorinated phosphate (DFP) that differed in P solubility in neutral ammonium citrate (NAC). In Exp. 1, 384 2-d-old male chicks were fed a corn-cornstarch-dextrose-soybean meal basal diet (1.22% lysine, 1.00% Ca, .45% P) or the basal with .05 or .10% P from monosodium phosphate (MSP), or .10% P from DFP with 60, 70, 75, 82, or 91% NAC soluble P. Each diet was fed to six pen replicates of eight chicks per pen for 14 d (58 to 402 g). Growth rate, feed/gain, and tibia breaking strength and ash concentration were improved (P < .001) by P supplementation, regardless of P source. Tibia strength and ash were regressed on P intake, and slope-ratios were calculated to assess the relative bioavailability of P in the DFP sources. The bioavailabilities of P in the 60, 70, 75, 82, and 91% NAC soluble DFP sources, relative to MSP (given a value of 100), were 81, 75, 84, 84, and 91%, respectively (linear, P < .08). In Exp. 2, 35 individually penned pigs were fed a corn-soybean meal basal diet (.95% lysine, .75% Ca, .33% P) or the basal with .15% P from MSP or from the five DFP sources. Each diet was fed to five pigs for 33 d (15.0 to 35.9 kg). Growth rate, feed/gain, and breaking strength of the metacarpals, metatarsals, and femurs were improved (P < .001) by MSP and DFP.(ABSTRACT TRUNCATED AT 250 WORDS)

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“…However, these results are difficult to interpret because the birds grew better. Other reports (Nelson and Walker, 1964;Peeler, 1972;Nelson et al, 1990;Sullivan et al, 1992) using tibia bone ash as a response also found rock phosphate to have a lower P utilization than DCP. The exact reason is still unknown, but perhaps some unknown contamination or differences in solubility of HRP caused differences in the P and Ca contents of tibia and serum.…”

Section: Discussionmentioning

confidence: 90%

Evaluation of an indigenous source of rock phosphate as a supplement for broiler chickens

2011

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This study investigated the effects of replacing dicalcium phosphate (DCP) with Hazara rock phosphate (HRP) on the growth performance of broiler chickens. The purpose was to determine the maximum level of F that could be well tolerated. The HRP (13.16% P and 2.98% F) was incorporated into a standard corn- and soybean meal-based diet by replacing 0, 25, 50, 75, and 100% of DCP based on P. Each treatment consisted of 5 replicate pens of 10 chicks each. The Ca and nonphytate P contents of all diets were maintained constant at 1.0 and 0.45%, respectively. Replacing 25% DCP with HRP significantly increased average BW gain. Substituting 100% HRP (562 mg of F/kg) decreased (P < 0.05) BW gain. The BW gain was maximized at 63.5:36.5 (DCP:HRP) using a quadratic relationship: BW gain (g) = 1,128.6 + 2.6848 × HRP - 0.0368 × HRP(2). Increasing the level of HRP decreased feed intake: feed intake (g) = 1,987.4 + 2.775 × HRP - 0.0515 × HRP(2). The effect of HRP was not pronounced (significant at P < 0.05) until 75% of DCP was replaced by HRP. Feed intake decreased by an average 3.77 g with each 1.0% increase in the levels of HRP beyond 27% HRP substitution. Replacing DCP with HRP up to 50% caused a significant increase in hot carcass weights. The Ca content of tibia was a quadratic function of HRP and was predicted to be highest at 56% HRP substitution. However, increasing HRP in the diet gradually decreased tibia P content (linear function). Serum Ca was increased by substituting HRP for DCP (linear effect). Increasing HRP in the diet decreased the P content of the serum and was predicted to be lowest (P < 0.05) beyond 50% HRP substitution, suggesting poor P availability at high HRP. In conclusion, growth was maximized by feeding about 36.5% HRP (205 mg of F/kg) and 63.5% DCP as P supplements. Using a multiple range test, it was concluded that between 25 and 50% DCP with HRP replacement (141 and 281 mg of F/kg, respectively) could be used safely without significantly decreasing the growth performance of broiler chickens.

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The Relative Biological Value of Feed Phosphates for Chicks

Cited by 20 publications

References 8 publications

Standardized total tract digestibility of phosphorus in various inorganic phosphates fed to growing pigs

Standardized total tract digestibility of phosphorus in various inorganic phosphates fed to growing pigs

Biological availability of phosphorus in defluorinated phosphates with different phosphorus solubilities in neutral ammonium citrate for chicks and pigs

Evaluation of an indigenous source of rock phosphate as a supplement for broiler chickens

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