研究论文 RESEARCH PAPER

向日葵副产物微贮复合发酵条件的响应曲面优化分析

  • 李肖 ,
  • 陈永成 ,
  • 许平珠 ,
  • 张凡凡 ,
  • 马春晖
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  • 1. 石河子大学动物科技学院, 石河子 832000;
    2. 新疆蓿之花草源生态有限公司, 哈巴河 836700
李肖(1998-),男,新疆伊犁人,硕士研究生,研究方向为饲草加工与生产。E-mail:744364871@qq.com

收稿日期: 2021-12-23

  网络出版日期: 2022-07-14

基金资助

农业农村部国家现代农业产业技术体系项目(CARS);新疆维吾尔自治区优质饲草产业技术体系项目(SCTX-2021-03)

Response Surface Optimization Analysis of Compound Fermentation Conditions of Sunflower By-Products Micro-Storage

  • LI Xiao ,
  • CHEN Yongcheng ,
  • XU Pingzhu ,
  • ZHANG Fanfan ,
  • MA Chunhui
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  • 1. College of Animal Science and Technology, Shihezi University, Shihezi 832000, China;
    2. Xinjiang Xu zhi Hua Cao yuan ecology Co., Ltd., Habahe 836700, China

Received date: 2021-12-23

  Online published: 2022-07-14

摘要

本试验旨在研究向日葵副产物的最优发酵条件,为该资源的合理利用提供基础。试验采用响应曲面优化法,在向日葵副产物青贮中添加乳酸菌、糖蜜、尿素和纤维素酶4种复合发酵剂,其中乳酸菌的添加量分别为1×105、5×105和1×106 CFU/g,尿素的添加量分别为0.1%、0.3%和0.5%,糖蜜的添加量分别为2%、3%和4%,纤维素酶的添加量分别为0.05%、0.10%和0.15%,选择中性洗涤纤维(NDF)和乳酸(LA)含量为优化目标,进行复合发酵条件30 d的厌氧发酵(真空袋法)。结果表明:NDF和LA含量的二次多项式模型均极显著(P<0.01),决定系数(R2)分别为0.88和0.82。其中,糖蜜和纤维素酶添加量对NDF含量的曲面效应影响极显著(P<0.01),尿素和纤维素酶添加量的交互作用对NDF含量的曲面效应影响显著(P<0.05)。乳酸菌添加量对LA含量的曲面效应影响极显著(P<0.01),糖蜜添加量对LA含量的曲面效应影响显著(P<0.05),乳酸菌和糖蜜添加量的交互作用对LA含量的曲面效应影响显著(P<0.05),糖蜜添加量分别与尿素、纤维素酶添加量的交互作用对LA含量的曲面效应影响显著(P<0.05)。最终优化结果为乳酸菌添加量9.3×105 CFU/g,糖蜜添加量3.57%,尿素添加量0.3%,纤维素酶的添加量0.14%。在此条件下厌氧发酵30 d,理论上可使NDF含量降低34.06%,LA含量提高134.74%。

本文引用格式

李肖 , 陈永成 , 许平珠 , 张凡凡 , 马春晖 . 向日葵副产物微贮复合发酵条件的响应曲面优化分析[J]. 动物营养学报, 2022 , 34(7) : 4726 -4736 . DOI: 10.3969/j.issn.1006-267x.2022.07.059

Abstract

This experiment was conducted to study the optimal fermentation conditions of sunflower by-products, and to provide a basis for the rational utilization of this resource. Addition with lactic acid bacteria, molasses, urea and cellulase in the sunflower by-products silage through the response surface optimization method, the addition of lactic acid bacteria was 1×105, 5×105 and 1×106 CFU/g, respectively, the addition of urea was 0.1%,0.3% and 0.5%, respectively, the addition of molasses was 2%, 3% and 4%, respectively, and the addition of cellulase was 0.05%, 0.10% and 0.15%, respectively. The contents of neutral detergent fiber (NDF) and lactic acid (LA) were selected as the optimization objectives for anaerobic fermentation under compound fermentation conditions for 30 days (vacuum bag method). The results showed that the quadratic polynomial models of NDF and LA content were extremely significant (P<0.01), the coefficient of determination (R2) were 0.88 and 0.82, respectively. The additions of molasses and cellulase on the curved-surface effect of NDF content was significant (P<0.01), and the interaction of additions of urea and cellulase on the curved-surface effect of NDF content was significant (P<0.05). The addition of lactic acid bacteria on the curved-surface effect of LA content was significant (P<0.01), the addition of molasses on the curved-surface effect of LA content was significant (P<0.05), the interaction between the additions of lactic acid bacteria and molasses on the curved-surface effect of LA content was significant (P<0.05), and the interaction between the additions of molasses and urea and cellulase on the curved-surface effect of LA content was significant (P<0.05). The final optimized results shows that the addition of lactic acid bacteria is 9.3×105 CFU/g, the addition of molasses is 3.57%, the addition of urea is 0.3%, and the addition of cellulase is 0.14%. Under the condition of anaerobic fermentation for 30 days, the NDF content can be decreased by 34.06% and LA content can be increased by 134.74%.

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