Dataset from Soil N and dissolved organic matter chemodiversity: bacterial utilization of soil C and effects on N mineralization after six years of organic and inorganic fertilization

We hypothesized that: ⅰ) continuous application of chemical fertilizer and decomposed cow manure alone or in combination can alter soil DOM compositions and mediate strategies for bacterial utilization of soil carbon and, ⅱ) DOM composition and soil nitrogen vary in their relative contributions to nitrogen mineralization in this study. The data included soil organic carbon and total N in paddy soil from 2015 to 2020, alkaline-nitrogen, NO3-N and NH4-N in paddy soil in 2020, the molecular composition of the DOM in soil analyzed by FT-ICR-MS in 2020, bacteria composition in soil 2018 and 2020 under the treatments of organic and inorganic fertilization. We highlighted continuous decomposed cow manure application increased soil nitrogen and recalcitrant components of DOM that mediated the strategies for bacterial carbon utilization and affected the nitrogen mineralizaiton. Total-nitrogen (TN), alkaline-nitrogen (AN) and bacterial diversity played an important effect on nitrogen mineralization, as well as lipids presented a positively total effect on nitrogen mineralization stronger than protein/amino sugars. However, tannins, lignins, condensed aromatics, carbohydrates, and unsaturated hydrocarbons showed a negatively total effect on nitrogen mineralization.