Linking changes in the soil microbial community to C and N dynamics during crop residue decomposition

Crop residues are among the main inputs that allow organic carbon (C) and nutrients to be maintained in agricultural soil. It is an important management strategy can improve soil fertility enhance productivity. This work aims evaluate extent of changes may occur heterotrophic microbial communities involved matter decomposition C nitrogen (N) mineralization after addition crop residues. Soil microcosm experiments were performed at 28°C for 90 days with three contrasting biochemical qualities: pea (Pisum sativum L.), rapeseed (Brassica napus wheat (Triticum aestivum L.). Enzyme activities, N mineralization, bacterial fungal biomasses monitored, along community composition, by high-throughput sequencing 16S rRNA ITS genes. The caused decreases β-glucosidase arylamidase activities simultaneous enhancement net immobilization, which linked communities. decreased treatment there shifts diversity phyla, order, genera levels. Some specific orders dependent on residue type. For example, Chloroflexales, Inquilinus, Rubricoccus, Clitocybe, Verticillium identified soils residues; whereas Thermoanaerobacterales, Thermacetogenum, Hypoxylon enriched residues, Halanaerobiales, Rubrobacter, Volutella only present findings this study suggest dynamics presence driven selection decomposers qualities If processes showed operational taxonomic unit (OTU) signatures, also suggests a strong functional redundancy exists