Summary
This meta-analysis synthesises evidence from multiple peer-reviewed field studies on how organic fertilisation — including manure, compost, and other organic amendments — influences soil bacterial diversity compared to conventional mineral fertilisation or unfertilised controls. Published in Plants (2023), the paper likely pools data across contrasting soil types, climates, and cropping systems to derive overall effect estimates and identify key moderating variables. The findings are expected to contribute quantitative evidence supporting the role of organic amendments in maintaining or enhancing soil microbial biodiversity.
UK applicability
Although the meta-analysis draws on studies from multiple countries globally, its findings are broadly applicable to UK arable and mixed farming systems where organic amendments such as farmyard manure and compost are commonly used; the results may inform UK soil health policy under frameworks such as the Environmental Land Management scheme.
Key measures
Soil bacterial alpha diversity indices (e.g. Shannon index, Chao1, OTU richness); bacterial community composition (beta diversity); effect sizes (Hedges' g or similar) across pooled studies
Outcomes reported
The study quantified the overall effect of organic fertiliser applications on soil bacterial alpha and beta diversity indices relative to mineral fertiliser or unfertilised controls. It likely reported effect sizes across multiple studies, identifying factors such as fertiliser type, soil properties, and cropping system that moderate the response.
Topic tags
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