Insights into seasonal variation of litter decomposition and related soil degradative enzyme activities in subtropical forest in China

We used a litterbag method to investigate litter decomposition and related soil degradative enzyme activities across four seasons in a broad-leaved forest and a coniferous forest on Zijin Mountain in sub-tropical China. Across four seasons, we quantified litter mass losses, soil pH values, and related soil degradative enzyme activities. Litter decomposition rates differed significantly by season. Litter decomposition rates of broadleaf forest leaves were higher than for coniferous forests needles across four seasons, and maximal differences in litter decomposition rates between the two litter types were found in spring. Obvious differences in litter decomposition rates of the two litter types were found in winter, which were similar to rates in spring. Litter decomposition rates of the two litter types in autumn were significantly higher than in spring. Soil degradative enzyme activities were lowest in winter and highest in summer in most cases across four seasons.