Net GHG emissions. Error bars in each column represent the standard deviation of whole-profile sums of three replicates. One-way ANOVA with two-sided and post-hoc test was conducted for statistical significance; different lowercase letters denote significant differences between the rotations at P < 0.05. The exact P values: P < 0.001. Treatment abbreviations: WM winter wheatsummer maize (control case), SpWM sweet potatowinter wheatsummer maize rotation, PWM peanutwinter wheatsummer maize rotation, SWM soybeanwinter wheatsummer maize rotation, SmWM spring maize winter wheatsummer maize rotation, RSWM ryegrasssorghum winter wheatsummer maize rotation. Source data are provided as a Source Data file.
