Effects of experimental warming on the carbon and nitrogen contents of Calamagrostis angustifolia Changes of organic carbon and its labile fractions in topsoil with altitude in subalpine-alpine area of southwestern China Effects of soil warming and nitrogen addition on the  length distributions of different diameter class fine roots of Chinese fir seedlings. Adjustment of Forest Ecosystem Root Respiration as Temperature Warms Effects of simulated soil warming on the growth and physiological characters of Deyeuxia angustifolia.