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Interactions of phosphorus content and phytase inclusion in diets for growing pigs: Digestibility and P utilisation

Published online by Cambridge University Press:  20 November 2017

K.J. McCracken ,
V.E. Beattie ,
R.N. Weatherup ,
R. W. Henry  and
S. Smyth
K.J. McCracken
Affiliation:
Agricultural and Environmental Science Division, Department of Agriculture, Newforge Lane, Belfast BT9 5PX
V.E. Beattie
Affiliation:
Agricultural Research Institute, Hillsborough, BT26 6DR
R.N. Weatherup
Affiliation:
Agricultural Research Institute, Hillsborough, BT26 6DR
R. W. Henry
Affiliation:
Devenish Feeds Limited, Duncrue Street, Belfast
S. Smyth
Affiliation:
John Thompson and Sons, York Road, Belfast, BT15 3GW
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Extract

There is considerable literature on phosphorus requirements of pigs and on the use of phytase to improve phosphorus digestibility and reduce P excretion. However, much of this has been concentrated on weaned pigs (eg Beers and Jongbloed, 1992), the finishing stage (eg Russo et al, 1995) or the diets used were synthetic (eg Ketaren et al, 1993). The available P requirement for pigs between 20-50 kg was estimated at 3 g/kg by ARC (1981) but the NRC (1998) estimate is 2.3 g/kg. This paper reports digestibility and P utilisation data on 40 kg pigs using the grower diets employed in a study on the impact of commercially feasible reductions in dietary P content and of phytase inclusion on growth and bone strength (Weatherup et al, 1999).

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Programme
Information
Proceedings of the British Society of Animal Science , Volume 1999 , 1999 , pp. 167
Copyright
Copyright © The British Society of Animal Science 1999

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References

ARC (1981). The Nutrient Requirements of Pigs. Commonwealth Agricultural Bureaux, Slough.Google Scholar
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