Study of fine root production and litterfall in deciduous and coniferous forests in Korea

Background/Question/Methods

 Litterfall and fine root production take crucial part in nutrient cycling in forest ecosystems. To better understand and provide useful information on above- and below-ground production in forest ecosystems, we investigated litterfall, fine root biomass and production in deciduous forests and coniferous forests at Gwangneung long term ecological research site in Korea. Nine plots including five deciduous and four coniferous forest plots were established. Ingrowth core method was used to estimate fine root production and turnover. Litterfall was separated into leaves, twig, bark, seed, etc. and further leaves were separated by species. Eighteen ingrowth cores were collected every month except winter season (from December to February) and ten soil cores were taken in each plot in July to estimate fine root biomass by soil depth. Roots were divided into living and dead roots (four diameter classes: < 0.5, 0.5 - 1, 1 - 2 and 2 - 5 mm).

Results/Conclusions

 Our preliminary results show that total root biomass in nine plots ranges from 170 to 495 g m^-2. Total root biomass in deciduous forests was roughly more than that in coniferous forests except young-stand plot of Abies holophylla plantation. We found no correlation among fine root biomass, sum of the basal area and woody biomass production. For further research, we will test the relationships among fine root production, litterfall, and basal area increment by forest types. Finally, this study will help us improve understanding of nutrient cycling through fine root turnover and litterfall in deciduous and coniferous forests in cool temperate region.