Climatic controls on stable carbon and nitrogen isotope compositions of temperate grasslands in northern China
نویسندگان
چکیده
The natural abundances of stable carbon (C) and nitrogen (N) isotopes (δ13C δ15N) are extensively used to indicate the C N biogeochemical cycles at large spatial scales. However, patterns δ13C δ15N in plant-soil systems grasslands northern China their main driving factors across regional climatic gradient still not well understood. We measured plant soil compositions as associated environmental 2000 km (-0.2 9 °C; 152 502 mm) China. values surface were lower than those bottom for temperate typical steppe but had no significant differences meadow desert steppe. Soil declined with increasing organic (SOC) increased mean annual temperature (MAT). These changes attributed microbial decomposition rate. negatively correlated MAT precipitation (MAP), which mainly related low matter mineralization rate shift dominant species from C4 C3. Our results different influencing on along findings will provide scientific references future research grasslands.
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ژورنال
عنوان ژورنال: Plant and Soil
سال: 2022
ISSN: ['0032-079X', '1573-5036']
DOI: https://doi.org/10.1007/s11104-022-05712-x