執行成果摘要
This project is going to develop a restoration technique according to the ecosystem nutrient cycling for degraded Chamaecyparis forests due to natural soil acidification and podzolization processes caused by high precipitation and the chemical characteristics of Chamaecyparis. According to the results of the nutrient input and output budget and tree growth rate, it is suggested that the die-back sites of Chamaecyparis forests might be caused by accidental drought or wind-swept/windfall events and lead to a thinning effects on survived trees. However, although the average growth rate of surviving Chamaecyparis trees seems to be higher than thouse in healthy sites, they are significantly under nutrient-deficient stress.