Digestibilidade do cálcio de alimentos avaliada em frangos de corte e em suínos com diferentes métodos / Calcium digestibility from feedstuffs using different methods for broiler chickens and pigs

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Three hundred Cobb broilers, 21 days old, were housed in metabolism cages and distributed in a completely randomized design in factorial arrangement, 9 X 3 (treatments x methodologies) with six replicates and 5 animals per experimental unit. The methodologies studied were: total collection of excreta, excreta collection with indicator and ileal digesta collection with indicator. Simultaneously, thirty birds were fed a low of calcium diet to determine endogenous calcium losses. The indicator used was Acid Insoluble Ash (CAI). The average coefficients true of calcium retained obtained by the different methods: Limestone 1, 84,17%, Limestone 2, 86,92%, Dicalcium Phosphate, 85,93%; Monodicalcium Phosphate, 85,10%, Dolomitic Limestone, 89,29%, Meat and Bone Meal (40%), 85,23%; Meat and Bone Meal (50%), 85,82%; Poultry by Product Meal, 84,04%. There was no significant difference of calcium digestibility between the methodologies total excreta collection versus excreta collection with indicator, however the ileal digesta methodology showed lower calcium digestibility coefficients (-4,5%) when compared to the excreta methods. The coefficients of apparent and true digestibility of calcium of 9 feedstuffs was determined, using 22 crossbred barrows, housed in metabolism cages and distributed in an experimental block design 2 X 10, two methods: total collection of feces and fecal indicator, three blocks and 10 treatments (9 feedstuffs and a basal diet). Simultaneously, six animals were fed a low content of calcium to estimate endogenous losses and be able to determine the feedstuffs true digestibility coefficients of calcium. The fecal indicator utilized was Acid Insoluble Ash (CAI). The average true digestibility coefficients of the total collection method and the method of fecal indicator were: Limestone 1, 86.06%, Limestone 2, 85.26%, Dicalcium Phosphate, 81.95%; Monodicalcium Phosphate, 84,82%; Dolomitic Limestone, 86.52%; Meat and Bone Meal (40%), 68.32%; Meat and Bone Meal (50%), 67.48%; Poultry by-Product Meal, 73.68%, Calcium Lactate, 96.21%. There was no significant difference between the methods of total collection of feces and indicator.

ASSUNTO(S)

calcium alimentos digestibility digestibilidade cálcio nutricao e alimentacao animal feedstuffs

ACESSO AO ARTIGO

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