The Influence of Calcium on Phosphorus Utilization by Chicks

Nelson, T. S.; Hargus, W. A.; Storer, N. L.; Walker, A. C.

doi:10.3382/ps.0441508

Cited by 15 publications

(8 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Potchanakorn and Potter (1987) used reagentgrade, hydrous DCP as the reference phosphate. It contained approximately 20% more available phosphorus for chicks than reagentgrade, anhydrous DCP (Nelson and Walker, 1964;Nelson et al, 1965). Therefore, increasing the BV reported by Potchanakorn and Potter (1987) by 20% would result in the BV of the phosphorus in DCP being similar to that obtained in the present experiment for chicks.…”

Section: Resultssupporting

confidence: 83%

“…Waibel et al (1984) used a commercial mixture of MCP and DCP as their reference phosphate. When this phosphate was considered to be 100% available, the relative BV of the phosphorus in reagent-grade MCP was 111, which is similar to the value reported by Nelson and Walker (1964) and Nelson et al (1965) with beta-tricalcium phosphate as the reference phosphate. The difference in the relative BV of their reference standard and of reagent-grade MCP was similar to the difference in the relative BV of reagent-grade MCP and of reagent-grade anhydrous DCP (Table 5).…”

Section: Resultsmentioning

confidence: 79%

“…Nelson et al (1965) reported that wide calcium:phosphorus ratios reduced the bioavailability of the phosphorus in some reagentgrade phosphates, but not in others. In the current study, calcium was maintained at a constant .70%.…”

Section: Resultsmentioning

confidence: 97%

See 2 more Smart Citations

The Relative Biological Value of Feed Phosphates for Chicks

Nelson¹,

Kirby²,

Johnson³

1990

Poultry Science

Self Cite

View full text Add to dashboard Cite

Two experiments were conducted to determine the relative biological values (BV) of phosphorus in feed phosphates. Experiment 2 was a replicate of Experiment 1, except that an additional phosphate source was tested. Within experiments, each treatment was replicated twice. Each pen contained eight broiler cockerels. The experimental diets were composed primarily of corn and soybean meal. The reference phosphate [anhydrous, reagent-grade, dibasic calcium phosphate (AR-DCP)] was added to supply five levels of phosphorus. Each phosphate supplement was added to supply two levels of phosphorus. A regression equation was calculated based on logarithm g, nonphytate phosphorus per kilogram of diet versus the percentage of bone ash from chicks fed diets containing AR-DCP. Nonphytate phosphorus equivalents were calculated using the percentage of bone ash from chicks fed the test phosphates. The biological values of the test phosphates were determined as nonphytate phosphorus equivalents, minus the nonphytate phosphorus in the basal diet, divided by the amount of supplemental phosphorus. The BV obtained for the commercial phosphates in Experiments 1 and 2 were: dibasic calcium phosphate, 106 and 104; monobasic calcium phosphate. 102 and 104; defluorinated phosphate (DFP)-1, 88 and 90; and DFP-2, 100.

show abstract

Section: Resultssupporting

confidence: 83%

Section: Resultsmentioning

confidence: 79%

See 1 more Smart Citation

The Relative Biological Value of Feed Phosphates for Chicks

Nelson¹,

Kirby²,

Johnson³

1990

Poultry Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…This well-known phenomenon (Waldroup et al, 1963;Nelson et al, 1965) is thought to be mediated via the formation of insoluble calcium phosphate precipitates in the small intestine of birds, rendering P unavailable for absorption (Hurwitz and Bar, 1971). In consequence, as pointed out by several authors (Driver et al, 2005;Rama Rao et al, 2006), similar growth performance could be achieved with reduced dietary P provision if Ca was concomitantly reduced.…”

Section: Discussionmentioning

confidence: 95%

“…This means that the impact of the main factors of variation of the diet, such as calcium (Ca) and -E-mail: anarcy@tours.inra.fr microbial phytase, which affect P utilisation in broilers, needs to be evaluated. The role of Ca is contrasted since it has a deleterious digestive effect on P utilisation (Waldroup et al, 1963;Nelson et al, 1965), but remains essential for the deposition of P in bones. In addition, with the generalisation of the use of microbial phytase, an enzyme that releases P and can in turn be recognised as a reliable alternative source of P (Selle and Ravindran, 2007), there is a consensus that a narrow Ca : P ratio should be considered to optimise enzyme efficiency (Sebastian et al, 1996;Qian et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Meta-analysis of phosphorus utilisation by broilers receiving corn-soyabean meal diets: influence of dietary calcium and microbial phytase

Létourneau-Montminy

Narcy

Lescoat

et al. 2010

Animal

View full text Add to dashboard Cite

Pollution relative to phosphorus excretion in poultry manure as well as the soaring prices of phosphate, a non-renewable resource, remain of major importance. Thus, a good understanding of bird response regarding dietary phosphorus (P) is a prerequisite to optimise the utilisation of this essential element in broiler diets. A database built from 15 experiments with 203 treatments was used to predict the response of 21-day-old broilers to dietary non-phytate P (NPP), taking into account the main factors of variation, calcium (Ca) and microbial phytase derived from Aspergillus niger, in terms of average daily feed intake (ADFI), average daily gain (ADG), gain to feed (G:F) and tibia ash concentration. All criteria evolve linearly ( P , 0.001) and quadratically ( P , 0.001) with dietary NPP concentration. Dietary Ca affected the intercept and linear component for ADG ( P , 0.01), G:F ( P , 0.05) and tibia ash concentration ( P , 0.001), whereas for ADFI, it affected only the intercept ( P , 0.01). Microbial phytase addition impacted on the intercept, the linear and the quadratic coefficient for ADFI ( P , 0.01), ADG ( P , 0.001) and G:F ( P , 0.05), and on the intercept and the linear component ( P , 0.001) for tibia ash concentration. An evaluation of these models was then performed on a database built from 28 experiments and 255 treatments that were not used to perform the models. Results showed that ADFI, ADG and Tibia ash concentration were predicted fairly well (slope and intercept did not deviate from 0 to 1, respectively), whereas this was not the case for G:F. The increase in dietary Ca concentration aggravated P deficiency for all criteria while phytase addition had a positive effect. The more P deficiency was marked, the more the bird response to ADFI, ADG, G:F and tibia ash concentration was exacerbated. It must also be considered that even if the decrease in dietary Ca may improve P utilisation, it could in turn become limiting for bone mineralisation. In conclusion, this meta-analysis provides ways to reduce dietary P in broiler diets without impairing performance, taking into account dietary Ca and microbial phytase.

show abstract

Calcium tolerance of growing chickens: effect of ratio of dietary calcium to available phosphorus

Shafey

1993

World's Poultry Science Journal

View full text Add to dashboard Cite

Excess calcium intake has been shown to reduce growth and feed efficiency and to increase bone ash and bone strength in growing chickens. Source and level of dietary phosphorus have been shown to affect calcium tolerance. The effects of high calcium can be largely explained by its effects on intestinal pH. The proposed mechanism involves excess calcium reducing the soluble fraction of minerals and the proportion of minerals in small complexes. In consequence, their availability for absorption is probably also reduced. The growth depression of chickens fed on diets high in calcium may be partly caused by the decreased availability of other minerals needed for growth. Calcium tolerance of growing chickens may be increased by ensuring that there are higher than normal levels of the other required minerals in the diet. A comparison of phosphorus assay techniques with chicks. 8. Evaluation of two dietary levels of plant phosphorus for use in phosphorus assays. Poultry Science 50: 596-601 CLIFCORN, L.E., ELVEHJEM, C.A. and HART, E.B. (1938) The development of a ration for the study of perosis in chicks.

show abstract

The Influence of Calcium on Phosphorus Utilization by Chicks

Cited by 15 publications

References 11 publications

The Relative Biological Value of Feed Phosphates for Chicks

The Relative Biological Value of Feed Phosphates for Chicks

Meta-analysis of phosphorus utilisation by broilers receiving corn-soyabean meal diets: influence of dietary calcium and microbial phytase

Calcium tolerance of growing chickens: effect of ratio of dietary calcium to available phosphorus

Contact Info

Product

Resources

About