5. Conclusions
N
application could alter the effects of tillage practices on soil
microbial diversity, community composition, biomass, and CUE. Bacterial
and fungal diversities were more responsible for soil microbial
CUEC:N than their biomass. Although microbial
CUEC:N was more susceptible to tillage management than N
application, it increased with an increasing in N application rate under
the two tillage practices. Furthermore, soil microbial
CUEC:N increased soil POC and MAOC contents and N
application also increased the two SOC fractions.
This research underscores the
importance of N application to reveal the effect of tillage management
on POC and MAOC from the perspective of soil microbial properties, which
contributes to understanding the potential C sequestration benefits of N
application under no-tillage.