Effects of nitrogen addition on species richness and relationship between species richness and aboveground productivity of alpine meadow of the Qinghai-Tibetan Plateau, China
ZHANG Jie-Qi, LI Qi, REN Zheng-Wei, YANG Xue, WANG Gang
Chin J Plant Ecol . 2010, (10): 1125 -1131 .  DOI: 10.3773/j.issn.1005-264x.2010.10.001