Effect of an Enzyme Blend on the Performance, Diet Metabolizability, Phosphorous Retention, and Bone Mineralization of Broilers Fed Diets Containing Defatted Rice Bran

被引:0
作者
Moraes, M. L. [1 ]
Ledur, V. S. [1 ]
Kessler, A. M. [1 ]
Machado, P. H. M. [1 ]
Della, M. P. [1 ]
Ribeiro, A. M. L. [1 ]
机构
[1] Univ Fed Rio Grande do Sul, Dept Zootecnia, BR-90046900 Porto Alegre, RS, Brazil
关键词
Broiler chicken; defatted rice bran; enzyme blend; metabolism; mineral retention; performance; MICROBIAL PHYTASE; SUPPLEMENTATION; NUTRIENTS; AGE;
D O I
10.1590/1516-635x1702191-198
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
An experiment was conducted to evaluate the effect of an enzyme blend (EB) on the performance, diet metabolizability, phosphorus (P) retention, and bone mineralization of broilers fed diets containing 10% defatted rice bran (DRB). In total, 432 one- to 38-d-old male Cobb broilers were evaluated according to a completely randomized experimental design in 3 x 2 factorial arrangement. Three diets were tested with two nutrient reductions (NR) in the matrix (standard diet; NR I of 75 kcal/kg ME, 0.1% Ca and 0.1% available P; and NR II of 100 kcal/kg ME, 0.1% Ca and 0.1% available P) with or without the addition of an EB (200 g/t). The coefficients of total tract apparent retention (CTTAR) of the diets and P retention were determined by collecting excreta during two periods (14 to 17 and 28 to 31 d). As expected, birds fed the standard diet had higher BW, BW gain, and G:F compared to birds on the NR diets. The EB did not show any positive effects on CTTAR or on performance; however, birds fed the EB retained 6.58% more P from d 14 to 17 (p <= 0.07) and 8.55% from d 28 to 31 (p < 0.05). Tibiotarsus ash percentage also increased by 2.45% (p <= 0.06) on d 38. In diets containing 10% DRB, the enzyme blend showed biological activity improving P retention and tibiotarsus mineralization.
引用
收藏
页码:191 / 198
页数:8
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