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Effects of Nitrogen Addition on Photosynthetic Characteristics of Different Canopy Plants in Grassland
Xu Chong, Yu Qiang, Zuo Xiaoan, Zhang Chunping, Niu Decao
Journal of Desert Research . 2019, (1): 135 -141 .  DOI: 10.7522/j.issn.1000-694X.2018.00005