relationships between soil respiration and soil temperature (Ts) of the 10-cm soil layer in the ungrazed and grazed sites. HW: higher water addition treatments (with 50 and 100 mm); LW: lower water addition treatments (with 0, 5, 10 and 25 mm). The equation y = a × e^bx was used to descript the relations between soil temperature and soil respiration. Solid and dashed lines are the regressive curve of the grazed site [y = (1.209 ± 0.650) e^{(0.055 ± 0.024)x}, r² = 0.23, P = 0.03, Q₁₀ = 1.68] and ungrazed site [y = (0.408 ± 0.409) e^{(0.119 ± 0.054)x}, r² = 0.21, P = 0.04, Q₁₀ = 3.29] with higher water addition treatments, respectively. The coefficients of the equations were estimated value ± standard error.