Meta-análise da digestibilidade ileal de aminoácidos e minerais em suínos alimentados com dietas contendo enzimas

Abstract

Resumo -O objetivo deste trabalho foi avaliar, por meio da meta-análise, o efeito da fitase e da xilanase sobre a digestibilidade ileal aparente (DIa) de aminoácidos, cálcio e fósforo, em suínos em fase de crescimento. A base de dados consistiu de 21 artigos publicados entre 1998 e 2009, no total de 82 tratamentos e 644 suínos. A meta-análise foi realizada por análise gráfica, de correlação, de variância-covariância. As concentrações de fósforo fítico e as frações fibra em detergente neutro, fibra em detergente ácido e lignina em detergente ácido, nas dietas, apresentaram correlações baixas e negativas com a DIa do cálcio, fósforo e aminoácidos. A adição de fitase às dietas aumentou em 2% a DIa da arginina, em 14% a do cálcio e em 34% a do fósforo. A DIa da arginina, fenilalanina, isoleucina e lisina foi 3,3% superior em suínos alimentados com dietas com xilanase, em relação às dietas sem a enzima. O fósforo fítico e as fibras, nas dietas, reduzem a DIa do cálcio, do fósforo e dos aminoácidos essenciais. O uso de fitase e xilanase, nas dietas, melhora o aproveitamento de cálcio, fósforo e alguns aminoácidos. No entanto, o excesso de cálcio e fósforo nas dietas reduz a ação da fitase sobre a digestibilidade ileal dos nutrientes.Termos para indexação: Sus scrofa, cálcio, fitase, fósforo, nutrição, xilanase. Meta-analysis of ileal digestibility of amino acids and minerals in pigs fed diets containing enzymesAbstract -The objective of this study was to evaluate the effect of phytase and xylanase on the apparent ileal digestibility (aID) of amino acids, calcium and phosphorus in growing pigs through meta-analysis. The database consisted of 21 articles published between 1998 and 2009, with a total of 82 treatments and 644 pigs. A meta-analysis was performed by graphical, correlation, variance and covariance analyses. Concentrations of phytic phosphorus and the fractions neutral detergent fiber, acid detergent fiber and acid detergent lignin, in the diet, showed a low and negative correlation with aID of calcium, phosphorus and amino acids. The addition of phytase in the diets increased the aID of arginine in 2%, calcium in 14% and phosphorus in 34%. The aID of arginine, phenylalanine, isoleucine and lysine was 3.3% higher in pigs fed diets containing xylanase, in comparison to the diets without the enzyme. Phytic phosphorus and fiber in the diets reduce the aID of calcium, phosphorus and essential amino acids. The use of phytase and xylanase in the diets improves the utilization of calcium, phosphorus and some amino acids. However, excessive calcium and phosphorus in the diets reduces the phytase action on the ileal digestibility of the nutrients.

The effect of dietary phytase on broiler performance and digestive, bone, and blood biochemistry characteristics

“…Protein utilization and amino acid absorption may also be influenced by dietary phytic acid levels (Lehnen et al, 2011;Walk et al, 2012). These authors observed that phytic acid is a potent chelating agent.…”

Effect of phytase supplementation on production performance and economics of Kadaknath chickens

“…This may be due to increase in the enzyme activity, necessary for growth by causing better feed utilization in the gastrointestinal tract and released minerals for growth (Rajpoot 2009). Protein utilization and amino acid absorption may also be influenced by dietary phytic acid (Lehnen et al 2011, Walk et al 2012, 2014.…”

“…Dietary Calcium and Phosphorus increased relative liver and heart weights. The bones of broilers fed phytase-supplemented diets presented higher ash content (Lehnen et al 2011, Walk et al 2014.…”

Factors that influences in the production of broiler chicken

“…There has been a growing interest in the use of meta-analysis in areas related to animal production and veterinary sciences as an essential tool for synthesizing computed results from multiple studies, particularly in those in which the effect is not readily detectable and the sample smaller . In addition, a large number of studies have shown the application of this technique (Sanches et al, 2007, Averos et al, 2010Lehnen et al, 2011;Carvalho et al, 2011;Andreatta et al, 2012Andreatta et al, 2016). The use of meta-analysis in the animal environment makes it possible to obtain a larger sample by combining several studies already performed, allowing a more accurate response than that obtained in individual studies (Giannoti 2004).…”