Responses of plant 15N natural abundance and isotopic fractionation to N addition reflect the N status of a temperate steppe in China
Zhilu Sheng, Yongmei Huang, Kejian He, Narigele Borjigin, Hanyue Yang, Huiying Chen, Engui Li, Xia Xu and Lei Duan
J Plant Ecol . 2019, (3): 550 -563 .  DOI: 10.1093/jpe/rty047