Contrasting effects of maize litter and litter-derived biochar on the temperature sensitivity of paddy soil organic matter decomposition.

ABSTRACT: Organic matter input regulates the rate and temperature sensitivity (expressed as Q ₁₀) of soil organic matter (SOM) decomposition by changing microbial composition and activities. It remains unclear how the incorporation of litter-made biochar instead of litter affects the Q ₁₀ of SOM decomposition. Using a unique combination of two-and three-source partitioning methods (isotopic discrimination between C3/C4 pathways and ¹⁴C labeling), we investigated: (1) how maize litter versus litter-made biochar (of C4 origin) addition influenced the Q ₁₀ of SOM (C3 origin) under 10°C warming, and (2) how the litter or biochar amendments affected the Q ₁₀ of ¹⁴C-labeled fresh organic matter (FOM) after long-t

SUBMITTER: Cui J 

PROVIDER: S-EPMC9557949 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature