Variations of nitrogen and phosphorus limitation along the environmental gradient in alpine grasslands on the Northern Xizang Plateau
ZONG Ning, SHI Pei-Li, ZHAO Guang-Shuai, ZHENG Li-Li, NIU Ben, ZHOU Tian-Cai, HOU Ge
Chin J Plant Ecol . 2021, (5): 444 -455 .  DOI: 10.17521/cjpe.2020.0135