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Effect of microbial inoculation on nutrient turnover and lignocellulose degradation during composting: A meta-analysis

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Title Effect of microbial inoculation on nutrient turnover and lignocellulose degradation during composting: A meta-analysis
 
Creator Nigussie, Abebe
Dume, Bayu
Ahmed, Milkyas
Mamuye, Melkamu
Ambaw, Gebermedihin
Berhiun, Goytom
Biresaw, Armaye
Aticho, Abebayheu
 
Subject food security
agriculture
climate change
composting
nutrients
 
Description Although microbial inoculants are promoted as a strategy for improving compost quality, there is no consensus in the published literature about their efficacy. A quantitative meta-analysis was performed to estimate the overall effect size of microbial inoculants on nutrient content, humification and lignocellulosic degradation. A meta-regression and moderator analyses were conducted to elucidate abiotic and biotic factors controlling the efficacy of microbial inoculants. These analyses demonstrated the beneficial effects of microbial inoculants on total nitrogen (+30%), total phosphorus (+46%), compost maturity index (C:N ratio (-31%), humification (+60%) and the germination index (+28%). The mean effect size was -46%, -65% and -40% for cellulose, hemicellulose, and lignin respectively. However, the effect size was marginal for bioavailable nutrient concentrations of phosphate, nitrate, and ammonium. The effectiveness of microbial inoculants depends on inoculant form, inoculation time, composting method, and experimental duration. The microbial inoculant effect size was consistent under different feedstock types and experimental scales. These findings imply that microbial inoculants are important for accelerating lignocellulose degradation. Higher mean effect sizes have tended to be published in journals with higher impact factors, thus researchers should be encouraged to publish non-significant findings in order to provide a more reliable estimation of effect size and clarify doubts about the benefits of microbial inoculants for composting.
 
Date 2021-04-01
2021-04-12T12:37:20Z
2021-04-12T12:37:20Z
 
Type Journal Article
 
Identifier Nigussie A, Dume B, Ahmed M, Mamuye M, Ambaw G, Berhiun G, Biresaw A, Aticho A. 2021. Effect of microbial inoculation on nutrient turnover and lignocellulose degradation during composting: A meta-analysis. Waste Management 125:220-234.
0956-053X
https://hdl.handle.net/10568/113287
https://doi.org/10.1016/j.wasman.2021.02.043
PII-EA_CSVPartnerships
 
Language en
 
Rights Copyrighted; all rights reserved
Limited Access
 
Format 220-234
 
Publisher Elsevier
 
Source Waste Management