supported by the National Key Research and development Program of China (2016YFC0502602);the National Natural Science Foundation of China (U1612441);the project of high-level innovative talents of Guizhou Province [2015(4035)]
Natural nitrogen isotope composition(δ^(15)N) is an indicator of nitrogen sources and is useful in the investigation of nitrogen cycling in organisms and ecosystems. δ^(15)N is also used to study assimilation of ino...