Pearson's correlation among soil respiration and factors affecting soil respiration in maize fields during the peak growing season in three counties in North China.

Rs is the daily mean soil respiration rate (µmol CO2 m−2 s−1), Ts10 is the soil temperature at 10 cm depth (°C), SWC20 is the soil water content at 0 cm to 20 cm depth (m3 m−3), Chlcanopy is the canopy chlorophyll content (g m−2), LAI is the leaf area index, AGB is the aboveground biomass (kg m−2), SOC content is the soil organic carbon content (g kg−1), STN content is the soil total nitrogen content (g kg−1), and soil C/N is the soil C∶ N ratio. Significance levels:*p**p***pPearson's correlation among soil respiration and factors affecting soil respiration in maize fields during the peak growing season in three counties in North China.