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Zinc is one of the most deficient microminerals. For poultry, NRC (1994)recommended 40 ppm only but, commercial feeds contain more than 100 ppmresulting to toxicity. Zinc oxide is commonly used inorganic forticant but, its safetyis questionable compared to organic counterpart. Generally, the study aimed todetermine the effects of different levels of zinc oxide and zinc methionine in theperformance of broilers and their meat content at 36 and 42 days. To address thelatter, two experiments (experiment 1, zinc oxide and experiment 2, zinc methionine)were conducted and gathered data were analysed using ANOVA. Results showedthat in both experiments, the performance and meat zinc contents were not affectedbut, the parts were affected showing highest zinc content in the liver, followed by thethigh and legs, and the wings. Lowest amount was noted in the breast. Fortification,up to 36 days of feeding was found to be enough. In fortification programs, it isrecommended to use organic minerals. Keywords: Animal Nutrition, Fortification, Meat, Zinc, Taiwan

Effects of Different levels of Zinc in the Performance and Meat Zinc Contents of Broilers