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Implications of phytic acid and supplemental microbial phytase in poultry nutrition: a review

  • S Sebastian (a1), S.P. Touchburn (a1) and E.R CHAVEZ (a1)


Phytic acid or phytate is a naturally occurring organic complex found in plants. As a reactive anion, it forms a wide variety of insoluble salts with divalent and trivalent cations. Phytic acid is also known to complex with proteins and consequently reduce their availability. Recent studies indicate that phytic acid reduces the activity of pepsin, trypsin and αamylase. Because of a lack of endogenous phytase, which hydrolyses phytic acid, phytate phosphorus is biologically less available to poultry. Because of the complex factors influencing phytate hydrolysis, such as dietary calcium content, inorganic phosphorus and vitamin D3, and the age and genotype of birds, there is wide disagreement concerning the ability of poultry to utilize phytate phosphorus. Data suggest that the amount of endogenous phytase is extremely low in young birds but that it increases with age. Cereal based poultry diets supplemented with microbial phytase result in increased digestibility and availability of phytate bound phosphorus, calcium, zinc and copper. Microbial phytase supplementation has also been shown to increase ileal digestibility of crude protein and amino acids in female broiler chickens and in female turkeys, but curiously not in male chickens. There is no report to date of such a study in male turkeys. While the efficacy of supplemental microbial phytase depends on its rate of inclusion, on the calcium and phytate phosphorus contents and on the dietary ca1cium:phosphorus ratio, clear benefits have been shown in terms of increased availability of phytate-bound minerals and crude protein, and reduced environmental pollution through lower levels of phosphorus and nitrogen excretion. To maximize the benefit from the addition of microbial phytase, future research should focus on determining the optimum dietary conditions for it to work.



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Anderson, P.A. (1985) Interactions between proteins and constituents that affect protein quality. In: Digestibility and Amino Acid Availability in Cereals and Oilseeds (Finley, G.W. and Hopkins, D.T., Eds), American Association of Cereal Chemists, St. Paul, Minnesota, pp. 3136
Anderson, R.J. (1914) A contribution to the chemistry of phytin. Journal of Biological Chemistry 17: 171190
Aoyagi, S. and Baker, D. (1995) Effect of microbial phytase and 1,25-dihydroxycholecalciferol on dietary copper utilization in chicks. Poultry Science 74: 121126
Ashton, W.M., Evans, C. and Williams, P.C. (1960) Phosphorus compounds of oats. II. The utilization of phytate phosphorus by growing chicks. Journal of the Science of Food and Agriculture 11: 722729
Atwal, A.S., Eskin, N.A.M., Mcdonald, B.E. and Vaisey-Genser, M. (1980) The effects of phytate on nitrogen utilization and zinc metabolism in young rats. Nutrition Reports International 21: 257267
Ballam, G.C., Engster, H.M. and Snetzinger, D.C. (1984) Effect of calcium level on the ability of broiler and single comb white leghorn to hydrolyse phytate phosphorus. Poultry Science 63: 61 (Abstract)
Barre, R., Curtois, J.E. and Wormser, G. (1956) Etude de la structure de l'acide phytique aumoyen de ses courbes de titration et de la conductivity de ses solutions. Bulletin de Société de Chimie Biologique 36: 455460
Bartnik, M. and Szafranska, I. (1987) Changes in phytate content and phytase activity during germination of some cereals. Journal of Cereal Science 5: 2328
Biehl, R.R., Baker, D.H. and Deluca, H.F. (1995) Hydroxylated cholecalciferol compounds act additively with microbial phytase to improve phosphorus, zinc and manganese in chicks fed soy-based diets. Journal of Nutrition 125: 24072416
Bitar, K. and Reinhold, J.G. (1972) Phytase and alkaline phosphatase activities in intestinal mucosa of rat, chicken, calf and man. Biochimica Biophysia Acta 268: 442452
Broz, J., Oldale, P., Perrin-Voltz, A.H., Rychen, G., Schulze, J. and Simoes Nunes, C. (1994) Effect of supplemental phytase on performance and phosphorus utilization in broiler chickens fed a low phosphorus diet without addition of inorganic phosphates. British Poultry Science 35: 273280
Caldwell, R.A. (1992) Effect of calcium and phytic acid on the activation of trypsinogen and the stability of trypsin. Journal of Agricultural Food Chemistry 40: 4346
Campbell, G.L. and Bedford, M.R. (1992) Enzyme applications for monogastric feeds: A review. Canadian journal of Animal Science 72 449466
Camovale, E., Lugaro, E. and Lombardi-Boccia, G. (1988) Phytic acid in Faba bean and pea: Effect of protein availability. Cereal Chemistry 65: 114117
Cawley, R.W. and Mitchell, T.A (1968) Inhibition of wheat alpha-amylase by bran phytic acid. Journal of the Science of Food and Agriculture 19: 106
Chang, C.W. (1967) Study of phytase and fluoride effects in germinating corn seeds. Cereal Chemistry 44: 129142
Chang, R.H. (1975) Removal of phytic acid from beans by potentiation of in situ phytase. Ph.D dissertation, University of California, Berkeley
Cheryan, M. (1980) Phytic acid interactions in food systems. CRC. Critical Reviews in Food Science and Nutrition 13: 297302
Cooper, J.R. and Gowing, H.S. (1983) Mammalian small intestinal phytase (EC British Journal of Nutrition 50: 673678
Cosgrove, D.J. (1980) Inositol Phosphates: Their Chemistry, Biochemistry and Physiology, Elsevier Scientific Publishing Co., New York
Cosgrove, D.J. (1966) The chemistry and biochemistry of inositol polyphosphates. Review of Pure Applied Chemistry 16: 209215
Couch, J.R. and Creger, C.R. (1970) Levels and sources of phosphorus in laying hen nutrition. Nutrition Reports International 1: 95103
Davies, M.I. and Motzok, I. (1972) Properties of intestinal phytase. Poultry Science 51: 494501
Davis, P.N., Norris, L.C. and Kratzer, F.H. (1961) Interference of soybean protein with the utilization of trace minerals. journal of Nutrition 77: 217223
de Rham, O. and Jost, T. (1979) Phytate-protein interactions in soybean extracts and low- phytate soy protein products. Journal of Food Science 44: 596601
de Boland, A.R., Gamer, G.B. and O'dell, B.L. (1975) Identification and properties of phytate in cereal grains and oil seed products. Journal of Agricultural Food Chemistry 23: 11861189
Denbow, D.M., Ravindran, V., Komegay, E.T., Yi, Z. and Hulet, R.M. (1995) Improving phosphorus availability in soybean meal for broilers by supplemental phytase. Poultry Science 74: 18311842
Deshpande, S.S. and Cheryan, M. (1984) Effects of phytic acid, divalent cations, and their interactions on alpha-amylase activity. Journal of Food Science 49: 516519
Edwards, H.M. Jr. (1966) The effect of protein source in the diet of Zn65 absorption and excretion by chickens. Poultry Science 45: 421422
Edwards, H.M. Jr. (1983) Phosphorus. 1. Effect of breed and strain on utilization of sub-optimal levels of phosphorus in the ration. Poultry Science 62: 7784
Edwards, H.M. Jr. (1991) Effects of phytase utilization by monogastric animals. Proceedings of the Georgia Nutrition Conference for Feed Manufacturers,Atlanta, pp. 16
Edwards, H.M. Jr. (1993) Dietary 1,25-dihydroxycholecalciferol supplementation increases natural phytate phosphorus utilization in chickens. Journal of Nutrition 123: 567577
Edwards, H.M. Jr., Palo, P., Soonchaerenying, S. and Elliot, M.A. (1989) Factors influencing the bioavailability of phytate phosphorus to chickens. In: Nutrient Availability: Chemical and Biological Aspects (Southgate, D., Johnson, I. and Fenwick, G.R., Eds), The Royal Society Chemistry, Cambridge pp. 271276
Eeckhout, W. and De Paepe, M. (1991) The quantitative effects of an industrial microbial phytase and wheat phytase on the apparent phosphorus absorbability of a mixed feed by piglets. Proceedings of Fifth Forum of Applied Bio-technologyPart 11, University of GentBelgium pp. 16431646
Eeckhout, W. and De Paepe, M. (1994) Total phosphorus, phytate-phosphorus and phytase activity in plant feedstuffs. Animal Feed Science and Technology 47: 1929
Erdman, J.W. Jr. (1979) Oilseed phytates: nutritional implications. Journal of American Oil Chemists' Society 56: 736741
Ewing, W.R. (1963) Poultry Nutrition, Fifth Edition (Revised), The Ray Ewing Company, Pasadena, California
Farrell, D.J., Martin, E., Preez, J.J., Bongarts, M., Sudaman, A. and Thomson, E. (1993) The beneficial effects of a microbial phytase in diets of broiler chickens and ducklings. Journal of Animal Physiology and Animal Nutrtion 69: 278286
Gibbins, L.N. and Norris, F.W. (1963) Phytase and acid phosphatase in the dwarf bean (Phasrolus vulgaris). Biochemical Journal 186: 6771
Harms, R.H., Waldroup, P.W., Shirley, R.L. and Anderson, C.B. (1962) Availability phytic acid phosphorus for chicks. Poultry Science 41: 11891191
Hegsted, D.M., Trulson, M.F. and Stare, F.J. (1954) Role of wheat and wheat products nutrition. Physiological Reviews 34: 221258
Jongbloed, A.W., Mroz, Z. and Kemme, P.A. (1992) The effect of supplementary Aspergillus niger phytase in diet for pigs on concentration and digestibility of dry matter, total phosphorus, and phytic acid in different sections of the alimentary tract. Journal of Animal Science 70: 11591168
Knuckles, B.E and Betschart, A.A. (1987) Effect of phytate and other myo-inositol phosphate esters on alpha-amylase digestion of starch. Journal of Food Science 52: 719721
Knuckles, B.E., Kuzmicky, D.D. and Betschart, A.A. (1985) Effects of phytate and partially hydrolysed phytate on in vivo protein digestibility. Journal of Food Science 50: 10801082
Komegay, E.T., Denbow, D.M., Yi, Z. and Ravindran, V. (1996) Response of broilers to graded levels of Natuphos phytase added to corn-soybean meal based diets containing three levels of nonphytate phosphorus. British Journal of Nutrition 75: 839852
Kratzer, F.H., Alfred, J.B., Davis, P.N., Marshall, B.J. and Vohra, V. (1959) The effect of autoclaving soybean protein and the addition of ethylenediaminetetraacetic acid on biological activity of dietary zinc for turkey poults. Journal of Nutrition 68: 313323
Lease, J.G. (1966) The effect of autoclaving sesame meal on its phytic acid content and on the availability of its zinc to the chick. Poultry Science 45: 237241
Lei, X.G., Ku, P.K., Millar, E.R., Yokoyama, M.T. and Ullrey, D.E. (1994) Calcium level affects the efficacy of supplemental microbial phytase in corn soybean diets of weanling pigs. Journal of Animal Science 72: 139143
Liener, I.E. (1989) Antinutritional factors in legume seeds: state of art. In: Recent Advances of Research in Antinutritional Factors in Legume Seeds (Huisman, J., Van der Poel, T.F. B. and Liener, I.E., Eds), Pudoc, Wageningen, The Netherlands pp. 613
Lolas, G.M. and Markalds, P. (1977) The phytase of navy beans (Phaseohs vulgaris). Journal Food Science 42: 10941097
Low, A.G. (1985) Role of dietary fibre in pig diets. In: Recent Advances in Animal Nutrition (Haresign, W. and Cole, D.G.A., Eds), Butterworths, London p. 8793
Maddaiah, V.T., Kumick, A.A., Hulett, B.J. and Reid, B.L. (1964) Nature of intestinal phytase activity. Proceedings of the Society for Experimental Biology and Medicine 115: 10541057
Maenz, D.D., Engele-Schaan, C.M. and Classen, H.L. (1995) Phytase activity in the chick intestinal brush border membrane. Poultry Science 74: 76 (Supplement 1)
Mandal, N.C. and Biswas, B.B. (1970) Metabolism of inositol phosphates. 1. Phytase synthesis during germination in cotyledons of mung beans, Phaseolus aureus. Plant Physiology 45: 47
Mccuaig, L.W., Davies, M.I. and Motzok, I. (1972) Intestinal alkaline phosphatase and phytase of chicks: effect of dietary magnesium, calcium, phosphorus and thyroactive casein. Poultry Science 51: 526530
Mcward, G.W. (1969) Effects of phytic acid and ethylenediaminetetraactic acid (EDTA) on the chick requirement for magnesium. Poultry Science 48: 791794
Mitchell, R.D. and Edwards, H.M. (1996) Effects of phytase and 1,25-dihydroxycholecalciferol on phytate utilization and the quantitative requirement for calcium and phosphorus in young broiler chickens. Poultry Science 75: 95110
Mohammed, A., Gibney, M.J. and Taylor, T.G. (1991) The effect of dietary levels of inorganic phosphorus, calcium and cholecalciferol on the digestibility of phytate-P by the chick. British Journal of Nutrition 66: 251259
Moore, R.J. and Veum, T.L. (1983) Adaptive increase in phytate digestibility by phosphorus-deprived rats and the relationship of intestinal phytase (EC and alkaline phosphatase (EC 3.1.3. 1) to phytate utilization. British Journal of Nutrition 49: 145152
Mroz, Z., Jongbloed, A.W. and Kemme, P.A. (1994) Apparent digestibility and retention of nutrients bound to phytate complexes as influenced by microbial phytase and feeding regimen pigs. Journal of Animal Science 72: 126132
Nagai, Y. and Funahashi, S. (1962) Phytase (myo-inositol hexaphosphate phosphohydrolase) from wheat bran. Part 1. Purification and substrate specificity. Agricultural and Biological Chemistry 26: 794797
NRC (NATIONAL RESEARCH COUNCIL) (1994) Nutrient Requirements of Poultry. 9th Revised Edition, National Academy Press, Washington, DC
Nayni, N.R. and Markakis, P. (1986) Phytases. In: Phytic Acid: Chemistry and Applications (Graf, E., Ed.), Pilatus Press, Minneapolis pp. 101107
Nelson, T.S. (1967) The utilization of phytate phosphorus by poultry: a review. Poultry Science 46: 862871
Nelson, T.S. (1976) The hydrolysis of phytate phosphorus by chicks and laying hens. Poultry Science 55: 22622264
Nelson, T.S. (1984) Available calcium for poultry. Proceedings of the Florida Nutrition Conference for Feed ManufacturersOrlandoFlorida pp. 16
Nelson, T.S. and Kirby, L.K. (1987) The calcium binding properties of natural phytate in chick diets. Nutrition Reports International 35: 949956
Nelson, T.S., Daniels, L.B., Hall, J.R. and Shields, L.G. (1976) Hydrolysis of natural phytate phosphorus in the digestive tract of cows. Journal of Animal Science 42: 15091512
Nelson, T.S, Shieh, T.R., Wodzinsld, R.J. and Ware, J.H. (1968) The availability of phytate phosphorus in soybean meal before and after treatment with a mold phytase. Poultry Science 47: 18421848
Nelson, T.S., Shieh, T.R., Wodzinski, R.J. and Ware, J.H. (1971) Effect of supplemental phytase on the utilization of phytate phosphorus by chicks. Journal of Nutrition 101: 12891293
Newkirk, R.W. and Classen, H.L. (1995) Nutritional impact of canola meal phytate in broiler chicks. Poultry Science 74: 14 (Suppl. 1)
Nott, H., Morris, T.R. and Taylor, T.G. (1967) Utilization of phytate phosphorus by laying hens and young chicks. Poultry Science 46: 1301 (Abstract)
O'dell, B.L. (1962) Mineral availability and metal binding constituents of the diet. Proceedings of the Cornell Nutrition Conference for feed ManufacturersIthacaNew York pp. 7782
O'dell, B.L. and de Boland, A.R. (1976) Complexation of phytate with proteins and cations in corn germ and oilseed meals. Journal of Agricultural Food Chemistry 24: 804808
O'dell, B.L., de Boland, A.R. and Koirtyohann, S.R. (1972) Distribution of phytate and nutritionally important elements among the morphological components of cereal grains. Journal Agricultural Food Chemistry 20: 718721
Oberleas, D. (1973) Phytates. In: Toxicant Occurring Naturally in Foods, 2nd Edition. National Academy of Sciences, Washington D.C., pp. 363371
Oberleas, D. and Harland, B.F. (1996) Impact of phytate on nutrient availability, In: Phytase Animal Nutrition and Waste Management (Coelho, M.B. and Komegay, E.T., Eds), BASF Corporation, Mount Olive, NJ
Officer, D.I. and Batterham, E.S. (1992) Enzyme supplementation of LinolaTM meal for growing pigs. Proceedings of the Australian Society of Animal Production 9: 288296
Pallauf, V.J., Hohler, D. and Rimbach, G. (1992) Effect of microbial phytase supplementation to a maize-soya diet on the apparent absorption of Mg, Fe, Cu, Mn and Zn and parameters of Zn-status in piglets. Journal of Animal Physiology and Animal Nutrition 68: 18
Peeler, H.T. (1972) Biological availability of nutrients in feeds: availability of major mineral ions. Journal of Animal Science 35: 695699
Peers, G.F. (1953) The phytase of wheat. Biochemical Journal 53: 102110
Pemey, K.M., Cantor, A.H., Straw, M.L. and Herkelman, K.L. (1993) The effect of dietary phytase on growth performance and phosphorus utilization of broiler chickens. Poultry Science 72: 21062114
Pointillart, A. (1988) Phytate phosphorus utilization in growing pigs. In: Digestive Physiology the Pig (Buraczewska, L., Buraczewska, S. and Zebrowska, T., Eds), Proceedings of the 4th International Seminar, Polish Academy of Science, Jablonna, Poland pp. 192196
Prasad, A.S. (1966) Metabolism of zinc and its deficiency in human subjects, In: Zinc Metabolism (Prasad, AS., Ed.), Charles C. Thomas, Springfield, IL pp. 250256
Prattley, C.A. and Stanley, D.W. (1982) Protein-phytate interactions in soybeans. 1. Localization of phytate in protein bodies and globoids. Journal of Food Biochemistry 6: 243253
Qian, H., Kornegay, E.T. and Denbow, D.M. (1995) Utilization of phytate P and Ca as influenced by microbial phytase vitamin D3 and the ca1cium:total phosphorus ratio in broiler diets. Poultry Science 74: 126 (Suppl. 1)
Qian, H., Komegay, E.T. and Denbow, D.M. (1996) Phosphorus equivalence of microbial phytase in turkey diets as influenced by calcium to phosphorus ratios and phosphorus levels. Poultry Science 75: 6981
Ravindran, V., Bryden, W.L. and Kornegay, E.T. (1995a) Phytates: occurrence, bioavailability and implications in poultry nutrition. Poultry and Avian Biology Reviews 6: 125143
Ravindran, V., Komegay, E.T., Denbow, D.M., Yi, Z. and Hulet, R.M. (1995b) Response of turkey poults to tiered levels of Natuphos phytase added to soybean meal-based semi-purified diets containing three levels of non-phytate phosphorus. Poultry Science 74: 18431854
Reddy, N.R., Sathe, S.K. and Salunkhe, D.K. (1982) Phytates in legumes and cereals. Advances in Food Research 28: 191
Roberson, K. D and Edwards, H.M. (1994) Effects of 1,25-dihydroxycholecalciferol and phytase on zinc utilization in broiler chicks. Poultry Science 73: 13121326
Rojas, S.W. and Scott, J.L. (1969) Factors affecting the nutritive value of cottonseed mealas a protein source for chick diets. Poultry Scieme 48: 819835
Saio, K., Koyama, E. and Watanabe, T. (1967) Protein-calcium-phytic acid relationship in soybean. 1. Effects of calcium and phosphorus on solubility characteristics of soybean meal protein. Agricultural and Biological Chemistry 31: 110115
Salmon, A.J., Ali, M.S. and Mcginnis, J. (1969) Effect of level and sources of phosphorus and different levels of productivity on phosphorus utilization by laying hens. Poultry Science 48: 10041009
Sandberg, A.S., Anderson, H., Carlson, N.G. and Sandstrom, B. (1987) Degradation products of bran phytate formed during digestion in the human small intestine: effect of extrusion cooking on digestibility. Journal of Nutrition 117: 20612065
Scheideler, S.E. and Sell, J.L. (1987) Utilization of phytate phosphorus in laying hens as influenced by dietary phosphorus and calcium. Nutrition Reports International 35: 10731081
Scheuermann Von, S.E., Lantzsch, H.L. and Menke, K.H. (1988) In vitro and in vivo experiments on the hydrolysis of phytate. 2. Activity of plant phytase. Journal of Animal Physiology and Animal Nutrition 60: 64
Schoner, F.J., Hoppe, P.P. and Schwartz, G. (1991) Comparitive effects of microbial phytase and inorganic phosphorus on performance and retentions of phosphorus, calcium and crude ash in broilers. Journal of Animal Physiology and Animal Nutrition 66: 248255
Schoner, F.J., Hoppe, P.P., Schwarz, G. and 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: 235244
Schoner, F.J., Schwartz, G., Hoppe, P.P. and Wiesche, H. (1994) Effect of microbial phytase on Ca-availability in broilers. Third Conference of Pig and Poultry NutritionHalleGermanyNovember 29-December 1
Sebastian, S., Touchbum, S.P., Chavez, E.R. and Lague, P.C. (1996a) The effects of supplemental microbial phytase on the performance and utilization of dietary calcium, phosphorus, copper and zinc in broiler chickens fed a corn-soybean diets. Poultry Science 75: 729736
Sebastian, S., Touchburn, S.P., Chavez, E.R. and Lague, P.C. (1996b) Efficacy of supplemental microbial phytase at different dietary calcium levels on growth performance and mineral utilization of broiler chickens. Poultry Science 75: 15161523
Sebastian, S., Touchburn, S.P., Chavez, E.R. and Lague, P. C. (1997) Apparent digestibility of protein and amino acids in broiler chickens fed a corn-soybean diet supplemented with microbial phytase. Poultry Science 76: 17601769
Shafey, T.M., Mcdonald, M.W. and Dingle, J.G. (1991) Effects of dietary calcium and available phosphorus concentration on digesta pH and on the availability of calcium, iron, magnesium and zinc from the intestinal contents of meat chickens. British Poultry Science 32: 185194
Simons, P.C. M., Versteegh, H.A. J., Jongbloed, A.W., Kemme, P.A., Stump, P., Bos, K.D., Wolters, M.G. E., Beudeker, R.F. and Verschoor, G.J. (1990) Improvement of phosphorus availability by microbial phytase in broilers and pigs. British Journal of Nutrition 64: 525540
Singh, B. and Sedeh, H.G. (1979) Characteristics of phytase and its relationship to acid phosphatases and certain minerals in triticale. Cereal Chemistry 56: 267272
Singh, M. and Krikorian, A.D. (1982) Inhibition of trypsin activity in vitro by phytate. journal of Agricultural Food Chemistry 30: 799800
Tanaka, Y. and De Luca, H.F. (1974). Role of 1,25-dihydroxy vitamin D3 in maintaining serum phosphorus and curing rickets. Proceedings of the National Academy of Science of the United States of America 71: 10401045
Tao, S.H., Fox, M.R. S., Phillippy, B.Q., Fry, B.E., Johnson, M.L. and Johnston, M.R. (1986) Effects of inositol phosphates on mineral utilization. Federation Proceedings 45: 819826
Taylor, T.G. (1965) The availability of the calcium and phosphorus of plant materials by animals. Proceedings of the Nutrition Society 24: 105110
Temperton, H. and Cassidy, J. (1964) Phosphorus requirements of poultry.III. The effect of feeding a vegetable type diet without supplemental phosphorus to turkeys. British Poultry Science 5: 8788
Temperton, H., Dudley, J. and Pickering, G.L. (1965a) Phosphorus requirements of poultry.IV. The effects on growing pullets of feeding diets containing no animal protein or supplementary phosphorus. British Poultry Science 6: 125133
Temperton, H., Dudley, J. and Pickering, G.J. (1965b) Phosphorus requirements of poultry.V. The effects during the subsequent laying year of feeding growing diets containing no animal protein or supplementary phosphorus. British Poultry Science 6: 135141
Thiel, U. and Weigand, E. (1992) Influence of dietary zinc and microbial phytase supplementation on zinc retention and zinc excretion in broiler chickens. Proceedings of XIX World's Poultry CongressWorld's Poultry Science Association, AmsterdamThe Netherlands
Thiel, U., Weighand, E., Hoppe, P.P. and Schoner, F.J. (1993) Zinc retentionof broiler chickens as affected by dietary supplements of zinc and microbial phytase. In: Trace Elements in Man and Animals (Anke, M., Meissner, D. and Mills, C.F., Eds), Commonwealth Agricultural Bureaux, Farnham Royal, Slough SL2 3BW, UK pp. 658660
Thompson, L.U. and Serraino, M.R. (1986) Effect of phytic acid on rape seed protein digestibility and amino acid absorption. journal of Agricultural Food Chemistry 34: 468
Thomson, L.U. and Yoon, J.H. (1984) Starch digestibility as affected by poly phenols and phytic acid. Journal of Food Science 49: 12281229
Van Der Klis, J.D. and Versteegh, H.A. J. (1991) Ileal absorption of phosphorus in lightweight white laying hens using microbial phytase and various calcium contents in laying hen feed. Spelderholt Publication No. 563, Spelderholt,, Beekbergen, The Netherlands
Vandepopuliere, J.M., Ammerman, C.B. and Harms, R.M. (1961) The relationship of ca1cium:phosphorus ratios to the utilization of plant and inorganic phosphorus by the chick. Poultry Science 40: 951957
Vohra, P., Gray, G.A. and Kratzer, F.H. (1965) Phytic acid-metal complexes. Proceedings of the Society for Experimental Biology and Medicine 120: 447449
Wasserman, R.H. and Taylor, A.N. (1973) Intestinal absorption of phosphate in the chicks. Effect of vitamin D and other parameters. Journal of Nutrition 103: 586599
Wise, A. (1983) Dietary factors determining the biological activities of phytate. Nutrition Abstracts and Reviews 53: 791806
Yi, Z., Komegay, E.T., Lindemann, M.D. and Ravindran, V. (1994a) Effect of Natuphos phytase for improving the bioavailabilities of phosphorus and other nutrients on soybean meal-based semi-purified diets for young pigs. Journal of Animal Science 72: 7 (Suppl. 1)
Yi, Z., Komegay, E.T. and Meguirk, A. (1994b) Replacement values of inorganic phosphorus by microbial phytase for pigs and poultry. Journal of Animal Science 72: 330 (Suppl. 1)
Yi, Z., Komegay, E.T. and Denbow, D.M. (1996a) Supplemental microbial phytase improves the zinc utilization in broilers. Poultry Science 75: 540546
Yi, Z., Kornegay, E.T. and Denbow, D.M. (1996b) Effect of microbial phytase on nitrogen and amino acid digestibility and nitrogen retention of turkey poults fed corn-soybean meal diets. Poultry Science 75: 979990
Yi, Z., Komegay, E.T. and Denbow, D.M. (1995) Effect of microbial phytase on phosphorus and nitrogen retention and performance of turkey poults fed cornsoybean meal. Poultry Science 74: 108 (Abstract)
Yoshida, T., Tanaka, K. and Kasai, Z. (1975) Phytase activity associated with isolated aleurone particles of rice grains. Agricultural and Biological Chemistry 39: 289290


Implications of phytic acid and supplemental microbial phytase in poultry nutrition: a review

  • S Sebastian (a1), S.P. Touchburn (a1) and E.R CHAVEZ (a1)


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