Decomposition of mixed foliar litter I. Amicrocosm study Effect of snow cover on phosphorus release from leaf litter in the alpine forest in eastern Qinghai-Tibet plateau Effects of snowpack on early foliar litter humification during winter in a subalpine forest of western Sichuan Spatial characteristics in decomposition rate of foliar litter and controlling factors in Chinese forest ecosystems Effects of forest gap on hemicellulose dynamics during foliar litter decomposition in an subalpine forest