Adding different types and amounts of biochar to saline alkali soil: effects on its salt ions and microbial community in northwest China

In this study, we tested the effects of rice-husk biochar (RB) and bamboo biochar (BB), each applied separately at three addition levels (low level, 2.5%; medium level, 5%; high level, 10%) on the pH, EC, CEC, salt ions and microbial communities of soil.