A meta-analysis on the effectiveness of homofermentative and heterofermentative lactic acid bacteria for corn silage

PÁEZ ROXANA; SIGNORINI, M.L.; VINDEROLA, C.G.; BLAJMAN, J.E.; LINGUA, M.S.

JOURNAL OF APPLIED MICROBIOLOGY

WILEY-BLACKWELL PUBLISHING, INC

Lugar: Londres; Año: 2018 p. 1655 - 1669

1364-5072

Aims: This meta-analysis aims to assess the effect of lactic acid bacteria (LAB)inoculation on fermentation parameters, microbiological composition and aerobicstability of corn silage.Methods and Results: Data bases (PubMed, ScienceDirect, and Scopus) weresearched from 1980 to 2017. The criteria for inclusion were: randomised and controlled experiments using corn silage and published in peer-reviewed journals. The metaanalysis showed that LAB supplementation increased pH, acetate and propionate concentrations and decrease acid detergent fiber (ADF), water soluble carbohydrates (WSC) and ammoniacal nitrogen (NH3-N) compared to controls in the pooled raw mean difference random effect model. In addition, inoculation reduced counts of yeasts and molds, increased LAB counts, and markedly improved aerobic stability in corn silage. However, results indicated that the effect of inoculants may differ depending on the administration of homofermentative or heterofermentative LAB.Conclusions: For development of functional bacterial inoculants, both types of LAB should be used.Significance and Impact of Study: To our knowledge, this is the first meta-analysis to compare the application of homofermentative and heterofermentative LAB for corn silage.