Fine root, Litterfall and Litter Layer Dynamics of Natural Hardwoods in Central Taiwan

• Main Authors: Siao-Cian Huang, 黃筱茜
• Other Authors: 劉瓊霦
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/43940705228135928001

碩士 === 國立中興大學 === 森林學系所 === 100 === The purpose of this study was to investigate fine root biomass, litterfall and litter layer 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 Lienhauchi (1.81 Mg ha-1) and the lowest in Mt. Peitungyen (1.52 Mg ha-1). Fine root turnover rate was the highest in Hui-sun experiment forest (0.91 y-1), and the lowest in Mt. Peitungyen (0.68 y-1). In 2010, annual litterfall mass in Mt. Peitungyen, Hui-sun experiment forest and Lienhauchi were 6.34, 12.22 and 9.62 Mg ha-1 yr-1, respectively, increased with decreased elevation and were 5.23, 6.43 and 10.15 Mg ha-1 yr-1, respectively in 2011. Litter was the highest in Hui-sun experiment forest (14.07 and 14.00 Mg ha-1, respectively in 2010 and 2011). Decomposition constant increased (0.73, 0.87 and 1.09, respectively) with decreased elevation in 2010, but decomposition constant was 0.50, 0.46 and 0.96 in 2011, indicating decomposition rate decreased in 2011. Results showed that annual litterfall mass increased with decreased elevation, but litter layer was on the contrary. Increased fine root production and biomass resulted in fine root turnover increased, accelerated nutrient cycling in Hui-sun experiment forest.