gcb2738-sup-0001-FigureS1.tifimage/tif273K Figure S1. Aboveground biomass (a, c) and species richness (b, d) in N fertilized (N rate: low N, medium N, high N and N form: Am, Ni and AN and control: Control) and winter light-grazed alpine meadow (LGM) during the years of 2005 through 2010. Bars indicate SE of the mean (n = 9 for LGM and N fertilization treatments except for control n = 3). LGM was lightly grazed by yak and sheep only in winter. N fertilization treatments include control (0 g N m−2 yr−1), low (0.375 g N m−2 yr−1), medium (1.500 g N m−2 yr−1), and high (7.500 g N m−2 yr−1) N supply rates within each of the three N forms (Am, Ni and AN) in the winter light-grazing alpine meadow after removal of the primary consumers (yak and sheep) by enclosure.
gcb2738-sup-0002-FigureS2.tifimage/tif168K Figure S2. Temperature (a), precipitation (b), and photosynthetic active radiation (c) during the growing season (from May to October) and the full year (from January to December), respectively, in the 6 years of the experiment. The climatic data collected from Haibei meteorological station. The meteorological station is about 150 m away from our experimental area.

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