Contribution of root respiration to total soil respiration during non-growing season in mine reclaimed soil with different covering-soil thicknesses

Abstract An accurate assessment of root respiration in mine reclaimed soil is important for effectively evaluating mining area ecosystems. This study investigated dynamic changes and the contribution to total ( R r / t ratio) during non-growing season soil, with different covering-soil thicknesses. According thicknesses, was divided into four sites: 10–25 cm (site A), 25–45 B), 45–55 C), 55–65 D). From November 2017 April 2018 (except February 2018), respiration, temperature at 5 cm, water content, biomass were measured. The results show that exhibited similar diurnal monthly variations. strongly influenced by season, an exponential positive relationship P < 0.001). Root varies thickness greatest a cm. ratio also exhibits During mean value 51.15% soil. indicates primary source factor estimating potential emission CO 2 from regional scale.