[Impact of Biochar on Soil Bulk Density and Aggregates of Lou Soil].

The effect of biochar on the bulk density and aggregate stability of Lou soil was evaluated and compared after biochar was applied for 2 years and 5 years through a field-positioning experiment. Five biochar amounts were applied in this study, as follows:0 t·hm (B), 20 t·hm (B), 40 t·hm (B), 60 t·hm (B), and 80 t·hm (B). The biochar was produced by pyrolysis of stems and branches from fruit trees at the temperature of 450℃ with limited oxygen apply.