Fig. 1From: Different responses of soil respiration and its components to nitrogen and phosphorus addition in a subtropical secondary forestSeasonal variability of soil respiration (Rs), autotrophic respiration (Ra) and heterotrophic respiration (Rh) under four treatments from 2014 to 2015. Vertical bars show standard errors of the means (n = 4). CK, control; N, nitrogen addition; P, phosphorus addition; NP, both nitrogen and phosphorus additionBack to article page