執行成果摘要
Most of the soil carbon pool may be derived from the fine roots. Fine roots affect both microbial activity and decomposition process in soil.Its turnover have great contributions to soil organic matter sinks and potentially impact on soil carbon and nitrogen cycles. Although fine root dynamics act important role of these processes, but it’s very limited understanding of fine root dynamics in Taiwain.In this project we measure and evaluate fine roots and soil of the major nutrients of 3 plantations in Taiwan Hualien County. We find underground 0-30 cm soil, Michelia compressa have the highest fine root production in July, and the turnover rate is 0.97-1.0 month-1; Liquidambar formosana have the highest fine root production in March, and the turnover rate is 0.81-1.0 month-1; Elaeocarpus decipiens have the highest fine root production between January to March, and the turnover rate is 0.88-1.0 month-1. Within one year, Michelia compressa have 5.45 kg m-2 total biomass, 5.42 kg m-2 total fine root production and 0.99 yr-1 turnover rate in 0-30cm soil underground, Liquidambar formosana and Elaeocarpus decipiens have 1.77 and 0.76 kg m-2 total biomas, 1.72 and 0.73 kg m-2 total fine root production, 0.97 yr-1 and 0.96 yr-1 turnover rate. And the various nutrients of soil for each species are less significant correlation with total biomas, total fine root and turnover rate.