Grazing effects on herbage nutritive values depend on precipitation and growing season in Inner Mongolian grassland
Haiyan Ren, Guodong Han, Zhichun Lan, Hongwei Wan, Philipp Schönbach, Martin Gierus, Friedhelm Taube
J Plant Ecol . 2016, (6): 712 -723 .  DOI: 10.1093/jpe/rtw011