Resumo

MARTINEZ-AISPURO, José Alfredo et al. Starting pig diets including wheat bran and supplemented with xylanase. Ecosistemas y recur. agropecuarios [online]. 2017, vol.4, n.10, pp.73-80. ISSN 2007-901X.  https://doi.org/10.19136/era.a4n10.996.

The objective was to evaluate the addition of xylanase in nursery pig diets with a high amount of wheat bran (WB) and two energy levels. Growth performance, carcass characteristics and plasma urea concentration were assessed. Forty-eight hybrid barrows were used (7.98 kg initial body weight and 28 d of age), allotted in a completely randomized design. Treatments (T) were: T1, control diet: 3350 Kcal; T2: 3275 Kcal + xylanase; T3: 3350 Kcal + xylanase; T4: 3350 Kcal + WB + xylanase; T5: 3275 Kcal + WB + xylanase; T6: 3350 + WB + xylanase. The variables were analyzed with ANOVA and treatment means were compared with Tukey's test (p ≤ 0.1). For average daily gain (ADG), average daily feed intake, final body weight and fat free lean gain (FFLG), better response was observed in pigs fed diets without WB (p ≤ 0.1) where xylanase compensated energy reduction. The inclusion of xylanase in WB diets reduced the ADG and final body weight (p ≤ 0.1). Supplementation with WB did not change backfat thickness, longissimus muscle area (LMA) and lean meat percentage (p > 0.1). The backfat thickness and LMA were not affected (p > 0.1) by reducing energy in diets without WB (p > 0.1). In conclusion, diets high in wheat bran content affect growth performance variables, but it is offset by the addition of xylanase, as long as the energy matrix is observed.

Palavras-chave : Energy; non-starch polysaccharides; arabinoxylans; enzymes; fiber.

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