Abstract
Farmland soil is one of the important sources of N2O emission. How to reduce the emission of N2O from farmland soil is an important issue in the study of global climate change research the problem. The addition of biochar has been proved to be one of the means to improve soil and reduce the N2O emission of farmland soil, but the underlying mechanism is unclear. In this paper, the effects of biochar on soil physicochemical properties and soil N2O emission were reviewed. It is suggested that future studies on N2O emission from biochar should also focus on soil aggregate size and aging of biochar for the application of biochar provide ideas and references.
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