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Foram utilizados 112 leitões com peso inicial de 28,68kg, distribuídos em blocos ao acaso, em esquema fatorial 8×2 (oito tratamentos x dois sexos), sete repetições e dois animais por baia. As dietas foram formuladas com base no fósforo total, sendo estas à base de milho e de farelo de soja. O fósforo foi suplementado utilizando-se os fosfatos: bicálcico (FBC); monobicálcico (MBC); supertriplo (ST); supersimples (SS); rocha Catalão (ROCHA); mistura de fontes (MIST) e ácido fosfórico (AcF); e dieta-controle, sem o fósforo suplementar (CONT). Avaliou-se previamente a composição química de amostras de fontes de fósforo disponíveis no mercado. Os fosfatos MBC, FBC e AcF apresentaram baixo nível de contaminação por metais pesados. Observou-se variação no teor de metais pesados entre as marcas comerciais de supertriplo. O consumo do fosfato resultou em acúmulo de cobre nos músculos. A dieta-controle provocou acúmulo de chumbo e zinco no fígado, e a mistura de fontes e supertriplo ocasionou acúmulo de cádmio no fígado. A utilização de fontes alternativas de fósforo menos elaboradas influenciou a deposição de minerais no fígado e nos músculos dos suínos. One hundred twelve pigs averaging weight of 28.68kg, were allotted to a completely randomized blocks with seven replicates of two animals per box. The treatments consisted in factorial 8×2 (eight phosphorus sources x two sexes). The experimental diets were formulated based on corn and soybean meal and the phosphorus was supplemented through phosphate dicalcium (FBC), monodicalcium (MBC), triple superphosphate (ST), simple superphosphate (SS), Catalão rock (ROCHA), mixture of sources (MIST), and phosphoric acid (AcF) in addition to a control diet without supplemental phosphous (CONT). Samples of phosphorus sources available in the market were evaluated for particle size and chemical composition. The MBC, FBC and AcF showed a low level of heavy metal contamination, but a variation in the heavy metal composition for ST was observed. Swines fed on CONT diet showed lead and zinc accumulation in the liver. Swines fed on triple superphosphate and mixture of sources diets showed cadmium accumulation in the liver. Swine fed on ST diet showed copper accumulation in the muscles. Swine diets formulated with alternative and less elaborated sources of phosphorus caused liver and muscles deposition of minerals

Composição química de diferentes fontes de fósforo e deposição de metais pesados em tecidos de suínos