Nutritional and energetic value of rice by-products, with or without phytase, for growing pigs/Valor nutricional e energetico de sub-produtos do arroz, com ou sem fitase, para suinos em crescimento

The objective of this study was to evaluate nutritional and energetic value of rice by-products, with or without phytase, using growing pigs. Thirty-six male pigs were housed in individual metabolic cages. Total collection of feces and urine was carried out in two periods of ten days: five days for...

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Published inCiência rural Vol. 45; no. 7; p. 1305
Main Authors Dadalt, Julio Cezar, Ribeiro, Andrea Machado Leal, Kessler, Alexandre de Mello, Wesendonck, William Rui, Bockor, Luciane, Gomes, Gilson Alexandre
Format Journal Article
LanguageEnglish
Published Universidade Federal de Santa Maria 01.07.2015
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Summary:The objective of this study was to evaluate nutritional and energetic value of rice by-products, with or without phytase, using growing pigs. Thirty-six male pigs were housed in individual metabolic cages. Total collection of feces and urine was carried out in two periods of ten days: five days for adaptation and five days for collection. A randomized blocks design was used, considering the sampling period as a block, with five treatments and seven replicates. Two control diets (with and without phytase--Phy) were used in the digestibility calculations, the latter in order to evaluate the enzyme influence on energy digestibility of the tested ingredients. The control diet was replaced by 30% of one of the ingredients: defatted rice bran (DRB) with and without Phy and dephytinised defatted rice bran (DDRB). The use of Phy in the control diet did not influence DRB+Phy energy digestibility. Relative to DRB+Phy, dephytinised defatted rice bran had higher contents of ME and digestible protein but lower digestible P and Ca. Phy supplementation increased Ca and P utilization of DRB and improved energy and protein digestibility. The DRB without Phy showed the lowest digestibility coefficients for all responses. Metabolizable energy, digestible protein, phosphorus and calcium of DRB, DRB+Phy and DDRB were respectively 2140, 2288 and 2519kcal kg-1; 79.25, 92.41 and 107.10g [kg.sup.-1]; 1.62, 3.41, and 2.11g [kg.sup.-1] and 2.80, 3.79 and 2.90g [kg.sup.-1]. Key words: alternative ingredients, dephytinization, enzyme, nutrients. O objetivo do presente trabalho foi avaliar o valor nutricional e energetico de subprodutos do arroz, na presenca ou nao de fitase, para suinos em crescimento. Foram utilizados 36 suinos machos, castrados, alojados em gaiolas metabolicas individuais. Realizou-se a coleta total de fezes e urina em dois periodos de dez dias: cinco de adaptacao e cinco de coleta. Utilizouse o delineamento de blocos ao acaso, tendo-se considerado o periodo de coleta como bloco, com cinco tratamentos e sete repeticoes. Duas dietas controle (com e sem fitase--Fit) foram utilizadas nos calculos de digestibilidade, a ultima para avaliar a influencia da enzima na digestibilidade da energia dos ingredientes teste. A dieta controle foi substituida em 30% pelos subprodutos testados: farelo de arroz desengordurado (FAD) com ou sem Fit e farelo de arroz desengordurado desfitinizado (FADD). O uso de fitase na dieta controle nao influenciou na digestibilidade da energia do FAD+Fit. Comparado ao FAD+Fit, o farelo de arroz desengordurado desfitinizado apresentou mais EM e proteina digestivel, mas menos P e Ca digestiveis. A suplementacao de fitase melhorou a utilizacao do P e Ca do FAD e aumentou a digestibilidade da energia e da proteina. O FAD sem fitase apresentou os menores coeficientes de digestibilidade para todas as respostas. Energia metabolizavel, proteina, fosforo e calcio digestiveis do FAD, FAD+Fit e FADD foram, respectivamente, 2.140; 2.288 e 2.519kcal [kg.sup.-1]; 79,25; 92,41 e 107,10g [kg.sup.-1]; 1,62; 3,41 e 2,11g [kg.sup.-1] e 2,80; 3,79 e 2,90g [kg.sup.-1]. Palavras-chave: desfitinizacao, enzima, ingredientes alternativos, nutrientes.
ISSN:0103-8478
1678-4596
DOI:10.1590/0103-8478cr20141240