《中国畜牧兽医》 ›› 2017, Vol. 44 ›› Issue (11): 3179-3186.doi: 10.16431/j.cnki.1671-7236.2017.11.011

• 动物营养与饲料科学 • 上一篇    下一篇

米曲霉0-8固态发酵条件优化及其发酵产物对肉仔鸡日粮养分消化的影响

马剑青1,2, 郭艳丽1, 张铁鹰2   

  1. 1. 甘肃农业大学动物科学技术学院, 兰州 730070;
    2. 中国农业科学院北京畜牧兽医研究所, 动物营养学国家重点实验室, 北京 100193
  • 收稿日期:2017-04-01 出版日期:2017-11-20 发布日期:2017-11-21
  • 通讯作者: 郭艳丽, 张铁鹰 E-mail:guoyl@gsau.edu.cn;zhty999@163.com
  • 作者简介:马剑青(1991-),男,甘肃临夏人,硕士生,研究方向:动物营养与饲料科学,E-mail:304204306@qq.com
  • 基金资助:

    中国农业科学院科技创新工程专项经费(ASTIP-IAS08);"十二五"农村领域国家科技计划"生态环保饲料生产关键技术研发与集成示范"(2011BAD26B03)

Optimization of 0-8 Aspergillus oryzae Solid State Fermentation Conditions and the Effect of Fermented Product on Nutrient Digestion of Broiler

MA Jian-qing1,2, GUO Yan-li1, ZHANG Tie-ying2   

  1. 1. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
    2. State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2017-04-01 Online:2017-11-20 Published:2017-11-21

摘要:

试验通过筛选高产蛋白酶米曲霉及其固态发酵条件优化,获得高酶活固态发酵物,并应用于肉仔鸡日粮,以期为提高肉仔鸡日粮蛋白质等养分利用提供技术手段。经过对8种不同米曲霉孢子产品进行初筛、复筛后获得一株产酸性蛋白酶较高的米曲霉菌株0-8,采用单因素和正交试验设计,对其产酸性蛋白酶发酵条件进行优化。结果表明:米曲霉菌株0-8产酸性蛋白酶培养的最适温度30℃、发酵时间66 h、初始水分47.40%、接种量1.5×107个/mL、麸皮含量80%、碳氮比(C/N)为1/3,优化后酸性蛋白酶活力达14 416.64 U/g,比优化前提高了157.02%。在肉仔鸡日粮中添加米曲霉0-8发酵物500 mg/kg,经过适应期10 d、正试期5 d的饲养试验,结果表明:与对照组相比,添加米曲霉0-8发酵物对粗蛋白质及能量消化率均有一定提高,但差异不显著(P>0.05)。日粮添加米曲霉发酵物有益于肉仔鸡的生产,但其添加水平及方式有待进一步研究。

关键词: 米曲霉; 固态发酵; 酸性蛋白酶; 肉仔鸡

Abstract:

The high-yield protease was obtained by screening high-yield protease Aspergillus oryzae and optimizing its solid-state fermentation conditions, and then the effect of fermented product on nutrient digestion in broiler was studied. After the screening and re-screening of 8 different Aspergillus oryzae spores, a new Aspergillus oryzae strain 0-8 with high acid protease was obtained. The fermentation conditions of acid protease were optimized by single factor and orthogonal test experiment. The results showed that the optimum temperature was 30℃, the most suitable fermentation time was 66 h, the initial water content was 47.40%, the inoculation quantity was 1.5×107 spores/mL, the content of bran was 80%, C/N was 1/3, the optimized vigor of acid protease reached 14 416.64 U/g, which was 157.02% higher than that before optimization. 500 mg/kg Aspergillus oryzae 0-8 fermented product was added in the broiler diet, and the mutrient digestibility of broiler were measured after 10 d of adaptation and 5 d of test period. The results of the nutrient digestion of broilers showed that feeding Aspergillus oryzae 0-8 fermentation increased the CP and energy digestibility of broiler in a certain degree compared to control group, but there's no significant difference (P>0.05). Dietary supplementation of Aspergillus oryzae fermentation was beneficial to the production of broilers, but its additive dose or feeding pattern should be further studied.

Key words: Aspergillus oryzae; solid state fermentation; acidic protease; broiler

中图分类号: