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The Availability of Phytate Phosphorus in Soybean Meal Before and After Treatment With a Mold Phytase

1968; Elsevier BV; Volume: 47; Issue: 6 Linguagem: Inglês

10.3382/ps.0471842

1525-3171

Sacha B. Nelson, T. R. Shieh, Rudy J. Wodzinski, James H. Ware,

Food and Agricultural Sciences

PHYTATE phosphorus in plants is the mixed calcium-magnesium-potassium salt of phytic acid (Anderson, 1915; Averill and King, 1926). Most feed ingredients of plant origin contain from one-half to three-fourths of their total phosphorus as phytate (Common, 1940; Mollgaard, 1946). The chicks' ability to utilize phytate phosphorus remains a controversial subject despite extensive research to determine its availability. This problem was discussed in reviews by Kastelic and Forbes (1961), Taylor (1965), and Nelson (1967). It was stressed in the two earlier reviews that there was still no general agreement on the extent to which chicks utilize phytate phosphorus. Nelson (1967) concluded that the chick has a limited ability to utilize phytate phosphorus. Soybean meal (SBM), the major protein supplement in poultry feeds, is also a source of phosphorus. However, two-thirds of SBM phosphorus is bound as phytate. This report describes the ability of chicks to utilize the phytate phosphorus in untreated . . .