The early flush of CO2 mineralisation was due to the labile C present in both the
biochar and native SOC. Following the depletion of labile C, the
more recalcitrant C was left in the soilebiochar systems which
resulted in the dramatic reduction in the biochar C (and total C)
mineralisation rate. The continued biochar C mineralisation may be
due to changes in microbial abundance and diversity based on
available C sources