The effects of simulated nitrogen deposition on extracellular enzyme activities of litter and soil among different-aged stands of larch

Yuecun Ma, Biao Zhu, Zhenzhong Sun, Chuang Zhao, Yan Yang, Shilong Piao

J Plant Ecol . 2014, (3): 240 -249 . DOI: 10.1093/jpe/rtt028