YANG Li-jie, ZHANG Li-li, CHEN Wei, GONG Ping, WU Zhi-jie, XUE Yan, FANG Na-na, WANG Ling-li. The Study of Organic Nitrogen Uptake by Soil Microorganisms Using Gas Chromatography-Mass Spectrometry and Double Isotope Labeling[J]. Spectroscopy and Spectral Analysis, 2016, 36(5): 1478