Role of Lactiplantibacillus paraplantarum during anaerobic storage of ear-removed corn on biogas production

Hong Sun; Chaosheng Liao; Guangrou Lu; Yulong Zheng; Qiming Cheng; Yixiao Xie; Chunmei Wang; Chao Chen; Ping Li

doi:10.1016/j.biortech.2022.128061

Role of Lactiplantibacillus paraplantarum during anaerobic storage of ear-removed corn on biogas production

Bioresour Technol. 2022 Nov:364:128061. doi: 10.1016/j.biortech.2022.128061. Epub 2022 Oct 1.

Authors

Hong Sun¹, Chaosheng Liao¹, Guangrou Lu¹, Yulong Zheng¹, Qiming Cheng¹, Yixiao Xie¹, Chunmei Wang², Chao Chen³, Ping Li⁴

Affiliations

¹ College of Animal Science, Guizhou University, Guiyang 550025, China.
² Key Laboratory of Animal Genetics, Breeding & Reproduction in the Plateau Mountainous Region, Ministry of Education, Guizhou University, Guiyang 550025, Guizhou, China.
³ College of Animal Science, Guizhou University, Guiyang 550025, China; Key Laboratory of Animal Genetics, Breeding & Reproduction in the Plateau Mountainous Region, Ministry of Education, Guizhou University, Guiyang 550025, Guizhou, China.
⁴ College of Animal Science, Guizhou University, Guiyang 550025, China; Key Laboratory of Animal Genetics, Breeding & Reproduction in the Plateau Mountainous Region, Ministry of Education, Guizhou University, Guiyang 550025, Guizhou, China. Electronic address: lip@gzu.edu.cn.

PMID: 36195220
DOI: 10.1016/j.biortech.2022.128061

Abstract

To optimize the volatile fatty acid production for anaerobic fermentation, the ear-removed corn was ensiled without (control) or with Lactiplantibacillus plantarum (LP), Lacticaseibacillus paracasei (LC) and L. paraplantarum (LpP). Inoculation of LpP increased acetic acid content by 40%, and decreased butyric acid content by 38% in relative to control. Moreover, inoculation of LpP decreased the bacterial alpha diversity indices, while inherent species of Lentilactobacillus buchneri and L. hilgardii dominated the anaerobic fermentation. In particular, inoculation of LpP restricted the growth of yeasts and production of propionic acid at the early stage of storage, but continuously stimulated anaerobic fermentation, resulting in a higher maximal cumulative gas emissions of methane (by about 20 %) than that of LP and LC. Therefore, inoculation of LpP during anaerobic storage was favorable to produce intermediate metabolites (acetic acid) for subsequent biogas production of ear-removed corn.

Keywords: Agricultural byproduct; Bacterial community; Biomethane emission; Lactic acid bacteria; Pretreatment.