This webinar presents the findings of a global meta-analysis examining the factors that regulate the effectiveness of biological nitrification inhibition (BNI) in reducing nitrous oxide (N₂O) emissions from agricultural systems. BNI is a plant-mediated process in which certain metabolites inhibit soil nitrifying microorganisms, slowing the conversion of ammonium to nitrate and potentially reducing N₂O emissions.

By synthesizing results from 23 published studies, this analysis evaluates the influence of genetic, environmental, and management factors on cumulative N₂O emission reduction. The results highlight that plant genus and species, soil physical characteristics (including texture, clay and sand content, and bulk density), soil nutrient status (such as soil organic carbon, total nitrogen, available phosphorus, NH₄⁺ and NO₃⁻), drainage conditions, irrigation, geographic factors, measurement timing, and nitrogen fertilization practices (type and application rate) are key drivers shaping BNI effectiveness.

Main speaker : Samuel Diaz Vasquez Bio: Associate researcher at the Alliance of Bioversity International & CIAT, in Colombia and MSc student researcher in Biological Sciences (University of Aberdeen, UK) focused on greenhouse gas (GHG) mitigation in agricultural systems. His work integrates soil microbiology, forage management, and molecular biology to study microbial communities involved in nitrogen cycle. Experience in soil analysis, microbial identification using DNA sequencing, agricultural experimentation, fermentative bioprocesses, biofertilizers formulation and the analysis of biological data using RStudio. BEng Biochemical Engineer

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