The application of biochar and organic fertilizer substitution regulates the diversities of habitat specialist bacterial communities within soil aggregates in proso millet farmland

Abstract

Biochar and fertilizer regimes had a profound influence on the richness and structure of bacterial communities in specialized habitats. Organic fertilizer substitution markedly enhanced the bacterial richness of habitat specialists in macro-aggregates. NH4+-N was the important variable regulating the bacterial community and sub-community structure within soil aggregates. Bacterial network of habitat specialists with biochar addition was more complex and tighter than that without biochar