Data for: Biological mitigation of soil nitrous oxide emissions by plant metabolites

Plant metabolites significantly affect soil nitrogen (N) cycling, but their influence on nitrous oxide (N2O) emissions has not been quantitatively analyzed on a global scale. We conduct a comprehensive meta-analysis of 173 observations from 42 articles to evaluate global patterns of, and principal factors controlling, N2O emissions in the presence of root exudates and extracts. Overall, plant metabolites promoted soil N2O emissions by about 10%. However, the effects of plant metabolites on N2O emissions from soils varied with experimental conditions and properties of both metabolites and soils. Primary metabolites, such as sugars, amino acids, and organic acids, strongly stimulated soil N2O emissions, by an average of 79%, while secondary metabolites, such as phenolics, terpenoids, and flavonoids, often characterised as both biological nitrification inhibitors (BNIs) and biological denitrification inhibitors (BDIs), reduced soil N2O emissions by an average of 41%. The emission mitigatio..., , , # Biological mitigation of soil nitrous oxide emissions by plant metabolites

[https://orcid.org/0009-0000-0549-9400](https://orcid.org/0009-0000-0549-9400)

This dataset serves the article \"Biological mitigation of soil nitrous oxide emissions by plant metabolites\" from the Global Change Biology, containing data of the cumulative N2O emissions under 173 different treatments extracted from 42 studies. The meanings represented by different abbreviations are shown in the “Table legend”. The “Total data” table contains data on plant metabolite properties(metabolite type, metabolite additive amount, and plant type), soil properties(soil pH, texture, and clay content) and experimental background (nitrogen fertilizer type, nitrogen application rate, experiment duration, and experiment type) extracted from 42 studies. “Data sources” table are the 42 studies from which the data is sourced.

## Description of the data and file structure

An extensive literature search to identify all relevant st...