Effect of organic carbon and nitrogen addition on the emission of nitrous oxide in aggregates from straw-incorporated soil

Vegetable field is one of the important sources of N2O emission. Effect of exogenous organic carbon and nitrogen input on the N2O emissions in different sizes of soil aggregates collected from protected field with/without corn straw incorporation was investigated using Robot incubation system. The result showed that the N2O production was not increased in all particle sizes of straw-treated soil aggregates. Exogenous organic carbon and nitrogen addition significantly increased the N2O production in soil aggregates from protected field.

The response of soil N2O emission to carbon and nitrogen input is still unclearly known. The characteristics of N2O emission from soil aggregates is useful to understand the mechanism (Wang et al., 2018).