Energy values evaluation and improvement of soybean meal in broiler chickens through supplemental mutienzyme

文献类型： 外文期刊

第一作者： Jiang, Qiuyu

作者： Jiang, Qiuyu;Wu, Wei;Wan, Yan;Wei, Yi;Guo, Yuming;Ban, Zhibin;Zhang, Bingkun;Kawamura, Yoichiro;Li, Junyou;Ban, Zhibin

作者机构：

关键词： energy value; broiler; enzyme; soybean meal

期刊名称：POULTRY SCIENCE （ 影响因子：4.014； 五年影响因子：4.192 ）

ISSN： 0032-5791

年卷期： 2022 年 101 卷 8 期

页码：

收录情况： SCI

摘要： This study measured the metabolizable energy of soybean meal (SBM) and evaluated effects of soybean meal specific enzymes supplementation in cornsoybean diets on growth performance, intestinal digestion properties and energy values of 28-day-old broilers. A total of 336 one-day-old male AA broiler chickens were distributed to 7 groups in a completely random design. The birds were given 7 diets containing 6 diets with different combined soybean meals and a fasting treatment, 8 replicates per treatment and 6 birds per replicate (Trial 1). A total of 672 one-day-old male AA broiler chickens were randomly allocated to 7 dietary treatments including a control diet and 6 diets supplemented with 300 mg/kg alpha-galactosidase, 200 mg/kg beta-mannanase, and 300 mg/kg protease individually or in combination (Trial 2). Apparent metabolizable energy (AME) of broilers was measured from d 25 to 27 in both trial 1 and trial 2. The results showed that AME values of combined soybean meals averaged 2,894 kcal/kg. Dietary beta-mannanase and protease supplementation increased body weight gain (P < 0.05) during d 0 to 14, whereas did not affect the growth performance (P > 0.05) during d 14 to 28. Addition of beta-mannanase in combination with other enzymes significantly increased lipase and trypsin content (P < 0.05) in ileum. In addition, dietary beta-mannanase and protease supplementation individually or in combination enhanced trypsin enzyme content in jejunum (P < 0.05). The beta-mannanase enzyme enhanced villus height and villus height to crypt depth ratio (P < 0.05) of ileum compared with control diet. Moreover, supplementation of enzyme except for protease enhanced raffinose and stachyose degradation ratio (P < 0.05). Dietary beta-mannanase supplementation individually or in combination enhanced AME and AMEn values (P < 0.05). This study demonstrated that dietary enzyme supplementation especially beta-mannanase improved intestinal digestion properties and contributed to high energy values.

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