台灣中部天然闊葉林細根之動態研究

Fine Root Dynamics of Natural Hardwoods in Central Taiwan

本試驗從2011年6月至2012年5月，於台灣中部南投地區（北東眼山、惠蓀林場及蓮華池），不同海拔天然闊葉林進行細根生物量之動態調查。細根月平均生物量以惠蓀林場最高（2.02 Mg ha-1），其次是蓮華池（1.81 Mg ha-1），最低則是北東眼山（1.52 Mg ha-1）。細根置換速率也以惠蓀林場最高（0.91 year-1），其次為蓮華池（0.76 year-1），最低為北東眼山（0.68 year-1）。本試驗結果顯示，細根產量增加，置換速率提高，細根分解時間減少，將使得惠蓀林場森林生態系養分循環加速。 The purpose of this study was to investigate fi ne root dynamics of three natural hardwoods, Mt. Peitungyen; Hui-sun experiment forest and Lienhauchi in central Taiwan from June 2011 to May 2012. Fine root biomass was the highest in Hui-sun experiment forest (2.02 Mg ha-1), following in Mt. Peitungyen (1.81 Mg ha-1) and the lowest in Lienhauchi (1.52 Mg ha-1). Fine root turnover rate was the highest in Huisun experiment forest (0.91 year-1), and the lowest in Mt. Peitungyen (0.68 year-1). Results showed that increased fine root production and biomass resulted in fine root turnover increased, accelerated nutrient cycling in Hui-sun experiment forest.