文献类型： 外文期刊

作者： Jin, Y. L. ¹ ; Ding, F. ² ; Shen, W. L. ¹ ; Fang, Y. ¹ ; Yi, Z. L. ¹ ; Yang, L. ¹ ; Zhao, H. ¹ ;

作者机构： 1.Chinese Acad Sci, Chengdu Inst Biol, CAS Key Lab Environm & Appl Microbiol, Environm Microbiol Key Lab Sichuan Prov, Chengdu, Peoples R China

2.Mianyang Acad Agr Sci, Mianyang, Peoples R China

3.Univ Chinese Acad Sci, Beijing, Peoples R China

关键词： Sweet potato starch residue; Protein Feed; Saccharomyces cerevisiae; Candida utilis; Resource regeneration

期刊名称：JOURNAL OF ANIMAL AND PLANT SCIENCES-JAPS （ 影响因子：0.7； 五年影响因子：0.7 ）

ISSN： 1018-7081

年卷期： 2023 年 33 卷 3 期

页码：

收录情况： SCI

摘要： Sweet potato residue (SPR), a byproduct generated during starch extraction from sweet potato, is usually treated as an agrowaste, resulting in lower economic benefits and serious environmental pollution. To promote resource recycling, SPR was used as a starting material to prepare a microbiological protein feed (MPF) by co-cultivating Saccharomyces cerevisiae and Candida utilis. The cultivation conditions were investigated, and the optimum conditions were determined as follows: inoculation amount of S. cerevisiae, 5%; inoculation amount of C. utilis, 5%; water content of SPR, 75%; urea, 1%; cellulase, 0.5%; and isoamylase, 0.5%, at a culture temperature of 32 degrees C. Under these conditions, true protein content in fermented SPR was enhanced to 18.08%, which was 6.34 times that of the original SPR. Amino acid composition and the essential amino acid index (EAAI) indicated the high nutritive value of MPF to cattle, rabbits, and lambs. This simple method provides a strategy for recycling and reusing agricultural residues in an economical and environment-friendly manner.