Abstract
Two experiments were conducted to determine the relative biological value (RBV) of phosphorus in two samples of poultry meal (PM 1 and PM 2) and to determine feeding value of these two products when incorporated into broiler diets. In Experiment 1 the phosphorus in defluorinated phosphate (DFP), the reference standard, was assigned a BV of 100 for comparative purposes. Using percentage bone ash as the criterion of response, the RBV of PM 1 and 2 were 100 and 107 and were not statistically different from that of DFP. Using a triple response method with body weight, gain:feed ratio, and percentage bone ash as the criteria of response, the RBV of PM 1 and 2 were 106 and 109, which were different (P<.05) from that of DFP. In Experiment 2, chicks were fed diets containing 5% of either Propak®, PM 1, or PM 2. Chicks fed the diet containing PM 1 grew faster than those fed diets containing Propak® or PM 2. No differences occurred in feed conversion and percentage bone ash among chicks fed the three diets.
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