Age-related changes in mineral retention and excretion in starter and finisher pigs diets with and without exogenous phytase

А. Ilchev, G. Gаnchev, S. Chobanova, D. Kanakov, P. Petkov, I. Nikiforov Five balance feeding trials were performed to evaluate age-related changes in nitrogen, phosphorus and calcium utilization in growing and fattening male castrated DanBred hybrid pigs. Two commercial phytase prepa
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