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Response of broilers to graded levels of microbial phytase added to maize–soyabean-meal-based diets containing three levels of non-phytate phosphorus

Published online by Cambridge University Press:  09 March 2007

E. T. Kornegay ,
D. M. Denbow ,
Z. Yi  and
V. Ravindran
E. T. Kornegay
Affiliation:
Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0306, USA
D. M. Denbow
Affiliation:
Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0306, USA
Z. Yi
Affiliation:
Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0306, USA
V. Ravindran
Affiliation:
Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0306, USA
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Abstract

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Male 1-d-old broilers (n 920) were given 0, 200, 400, 600, 800, 1000 and 1200 U microbial pbytase/kg diet in combination with 2·0, 2·7 or 3·4 g non-phytate P (nP)/kg or 4·0, 5·1 or 5·8 g total P (tP)/kg in a 21 d trial to assess the effectiveness of phytase in a maize–soyabean-meal diet. In addition to the above twenty-one diets, a positive control P diet supplied 4·5 g nP/kg, 6·9 g tP/kg and 10 g Ca/kg. The basal diet contained 230g crude protein/kg, 8·8 g Ca/kg, 4·4 g tP/Fg and 2/0 g nP/kg. Defluorinated phosphate and limestone were used to supply P and Ca. A Ca:tP ratio of 2:l was maintained except in the positive control diet which had a ratio of 1·45: 1. Phytase additions linearly increased (P < 0·01) body-weight (SW) gain, feed intake, toe ash percentage, and apparent retention (% of intake) or total amount (g/bird) of retained Ca and P, and linearly decreased (P < 0·01) P excretion (g/kg of DM intake) at each level of nP with the magnitude of the response inversely related to the level of nP. Above-normal mortality was only observed in the group receiving 2·0 g nP/kg diet without phytase. Adding nP linearly increased (P < 0·01) BW gain, feed intake, toe ash percentage, Ca retention, total amount (g/bird) of P retained, and P excretion, and iinearly decreased (P < 0·01) apparent retention (%) of P. Derived linear and non-linear equations for BW gain and toe ash percentage at the two lower nP levels, 2·0 and 2·7 g/kg, were used to calculate P equivalency value of microbial phytase. The results show that 939 U microbial phytase is equivalent to 1 g P from defluorinated phosphate in broilers fed on maize–soyabean-meal diets. The amount of P released per 100 U phytase decreased as the total amount of phytase increased.

Keywords

PhytaseBroilersPhosphorus
Type
Poultry nutrition
Information
British Journal of Nutrition , Volume 75 , Issue 6 , June 1996 , pp. 839 - 852
Copyright
Copyright © The Nutrition Society 1996

References

REFERENCES

Association of Official Analytical Chemists (1990). Official Methods of Analysis, 15th ed. Arlington, VA: AOAC.Google Scholar
Consortium (1988). Guide for the Care and Use of Agricultural Animals in Agricultural Research and Teaching. Champaign, IL: Consortium For Developing a Guide For the Care and Use of Agricultural Animals in Agricultural Research and Teaching.Google Scholar
Denbow, D. M., Ravindran, V., Kornegay, E. T., Yi, Z. & Hulet, R. M. (1995). Improving phosphorus availability in soybean meal for broilers by supplemental phytase. Poultry Science 74, 1831–1842.CrossRefGoogle ScholarPubMed
Driscoll, P. J. (1994). When flexible forms are asked to flex too much. Journal of Agricultural and Resource Economics 19, 183–196.Google Scholar
Engelen, A. J., van der Heeft, F. C., Randsdorp, P. H. G. & Smit, E. L. C. (1994). Simple and rapid determination of phytase activity. Journal of the Association of Official Analytical Chemists International 77, 760–764.Google ScholarPubMed
Irving, G. C. J. & Cosgrove, D. J. (1974). Inositol phosphate phosphatases of microbiological origin. Some properties of the partially purified phosphatases of Aspergillus ficuum NRRL 3135. Australian Journal of Biological Sciences 27, 361–368.CrossRefGoogle ScholarPubMed
Morris, E. R. (1986). Phytate and dietary mineral bioavailability. In Phytic Acid: Chemistry and Applications, pp. 57–76. [Graf, E. editor]. Minneapolis: Pilatus Press.Google Scholar
National Research Council (1994). Nutrient Requirements of Poultry, 9th ed. Washington, DC: National Academy of sciences.Google Scholar
Nelson, T. S., Schieh, T. R., Wodzinski, R. J. & Ware, J. H. (1968). The availability of phytate phosphorus in soybean meal before and after treatment with a mold phytase. Poultry Science 47, 1842–1848.CrossRefGoogle ScholarPubMed
Oberleas, D. (1973). Phytates. In Toxicants Occurring Naturally in Food, pp. 363–371. Washington, DC: National Academy of Sciences.Google Scholar
Potter, L. M. (1988). Bioavailability of P from various phosphates based on body weight and toe ash measurements. Poultry Science 67, 96–102.CrossRefGoogle Scholar
Potter, L. M., Potchanakorn, M., Ravindran, V. & Kornegay, E. T. (1995). Bioavailability of phosphorus in various phosphate sources using body weight and toe ash as response criteria. Poultry Science 74, 813–820.CrossRefGoogle ScholarPubMed
Qian, H., Kornegay, E. T. & Denbow, D. M. (1996). Phosphorus equivalence of microbial phytase in turkey diets as influenced by Ca:P ratios and P levels. Poultry Science 75, 69–81.CrossRefGoogle Scholar
Ravindran, V., Komegay, E. T., Denbow, D. M., Yi, Z. & Hulet, R. M. (1995 a). Response of turkey poults to tiered levels of Natuphos® phytase added to soybean meal-based semi-purified diets containing three levels of nonphytate phosphorus. Poultry Science 74, 1843–1854.CrossRefGoogle ScholarPubMed
Ravindran, V., Kornegay, E. T., Potter, L. M., Ogunbamer, B. W., Welten, M. K., Wilson, J. H. & Potchanakorn, M. (1995 b). An evaluation of various response criteria in assessing biological availability of phosphorus for broilers. Poultry Science 74, 1820–1830.CrossRefGoogle ScholarPubMed
Schoner, F. J., Hoppe, P. P. & Schwarz, G. (1991). Comparative effects of microbial phytase and inorganic phosphorus on performance and on retention of phosphorus, calcium and crude ash in broilers. Journal of Animal Physiology and Animal Nutrition 66, 248–255.Google Scholar
Schoner, F. J., Hoppe, P. P., Schwarz, G. & Wiesche, H. (1993). Effects of microbial phytase and inorganic phosphate in broiler chickens: performance and mineral retention at various calcium levels. Journal of Animal Physiology and Animal Nutrition 69, 235–244.Google Scholar
Schoner, F. J., Schwarz, G. & Hoppe, P. P. (1990). Influence of the P compound on the P and Ca retention and the P discharge in broilers. 102nd VDLUFA Congress,Berlin32, 437–442.Google Scholar
Schoner, F. J., Schwarz, G., Hoppe, P. P. & Wiesche, H. (1994). Effects of microbial phytase on Ca utilization in broilers. Third Conference on Poultry and Swine Nutrition,Halle, Germany29 November–1 December, pp. 147–150Google Scholar
Simons, P. C. M. & Versteegh, H. A. J. (1993). Role of phytase in poultry nutrition. In Proceedings 1st Symposium of Enzymes in Animal Nutrition, Kartause, Ittingen, Switzerland, 13–16 October, pp. 181–186 [Wenk, C. & Boessinger, M. editors]. Zurich: Schriftenreihe aus dem Institut fur Nutztierwissenschaften Gruppe Ernahrung ETH.Google Scholar
Simons, P. C. M., Versteegh, H. A. J., Jongbloed, A. W., Kemme, P. A., Slump, P., Bos, K. D., Wolters, M. G. E., Beudeker, R. F. & Verschoor, G. J. (1990). Improvement of phosphorus availability by microbial phytase in broilers and pigs. British Journal of Nutrition 64, 525–540.CrossRefGoogle ScholarPubMed
Statistical Analysis Systems (1990). SAS/STAT User's Guide: Statistics, release 6·04. Cary, NC: SAS Institute Inc.Google Scholar
Vogt, H. (1992). Effect of supplemental phytase to broiler rations different in phosphorus content. European Poultry Science 56, 93–98.Google Scholar
Yi, Z., Kornegay, E. T., Ravindran, V. & Denbow, D. M. (1996). Improving phytate phosphorus availability in corn and soybean meal for broilers using microbial phytase and calculati on of P equivalency values for phytase. Poultry Science 75, 240–249.CrossRefGoogle Scholar