Woody biochar's greenhouse gas mitigation potential across fertilized and unfertilized agricultural soils and soil moisture regimes
作者： Matt Ramlow , M. Francesca Cotrufo
DOI: 10.1111/GCBB.12474
关键词:
摘要: Biochar has been widely researched as an important technology for climate smart agriculture yet work is still necessary to identify the magnitude of potential greenhouse gas (GHG) mitigation and mechanisms involved. This study measured slow-pyrolysis wood-derived biochar's impact on GHG efflux, mineral N dynamics soil organic C in a series two incubations across fertilized unfertilized agricultural soils moisture regimes. research explored full drivers such impacts. Results this incubation indicate biochar provide annual emission reductions 0.58 1.72 Mg CO2-eq ha−1 at 25 application rate. The greatest was from sequestration nitrous oxide (N2O) reduction soils, with minimal impacts N2O emissions carbon dioxide (CO2) methane (CH4) uptake. Analysis bulk isolates indicated that neither net mineralization nitrification nor retention ammonium (NH4+) could explain reduction. Instead, amendments exhibited consistent relative control regardless type fertilization. gradient suggest woody may aerate shifting redox conditions subsequent production. Understanding driving these effects can help inform modeling efforts, field results applications maximize potential. This article protected by copyright. All rights reserved.
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