Unravelling how biochar and dung amendments determine the functional structure and community assembly related to methane metabolisms in grassland soils

Abstract

Highlights 1. Biochar amendment impeded methanogenesis and facilitated methane oxidation whereas dung amendment facilitated methanogenesis and impeded methane oxidation in grassland soils. 2. Dung amendment generated undominated processes rather than homogeneous selection as the primary driving force in the community assembly of methanogen. 3. Biochar amendment raised the contribution of dispersal limitation in the community assembly of methanotrophs. 4. Diversity and association of the network among the functional genes involved in carbon and nitrogen cycling decreased after biochar and dung amendments.

Keywords

• Biochar amendment
• Dung amendment
• Methane metabolism
• Nitrogen cycling
• Community assembly
• Geochip 5.0