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The availability of phytic acid phosphorus for chicks. 2. Comparison of phytin phosphorus sources



The availability of phytic acid phosphorus for chicks. 2. Comparison of phytin phosphorus sources



Poultry Sci 43(2): 426-432



Three experiments with broiler type chicks were conducted to determine the availability of phosphorus from 3 phytin phosphorus sources. The phosphorus from phytic acid (inositol hexaphosphoric acid) was highly available and equal to that of feed grade dicalcium phosphate or reagent grade monosodium phosphate. Sodium phytate phosphorus was less available than phytic acid phosphorus, but the availability tended to increase as the level of supplementation increased. Calcium phytate phosphorus was relatively unavailable for growth purposes but somewhat more available for bone calcification. The availability of the calcium phytate phosphorus declined as the level of supplementation increased. Increasing the vitamin D3 level of the diet from 360 to 1080 ICU per pound significantly increased the availability of phosphorus from calcium phytate but not from sodium phytate or phytic acid phosphorus. The addition of 200 ppm (parts per million) of zinc to the practical type degerminated corn-soybean meal diet used in these tests had no effect on the utilization of phosphorus from any of the phytin phosphorus sources or the inorganic phosphates.

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Accession: 014718248

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DOI: 10.3382/ps.0430426


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