Litterfall production and dynamic for twenty years of a successive replanting Cunninghamia lanceolata plantation at Huitong, Hunan STUDIES ON THE LITTERFALL AND ITS DECOMPOSITION OF CHINESE FIR PLANTATION IN MID-MOUNTAIN REGION OF LAOSHAN,TIANLIN COUNTY,GUANGXI Litter production and turnover in four types of subtropical forests in China Early effects of simulated nitrogen deposition on annual nutrient input from litterfall in a Pleioblastus amarus plantation in Rainy Area of West China