Physiological evaluation of nitrogen use efficiency of different apple cultivars under various nitrogen and water supply conditions
WANG Qian, LIU Chang-hai, HUANG Dong, DONG Qing-long, LI Peng-min, Steve van NOCKER, MA Feng-wang
Journal of Integrative Agriculture . 2020, (3): 709 -720 .  DOI: 10.1016/S2095-3119(19)62848-0