The effect of drainage on the fine root biomass, production, and turnover in hemiboreal old-growth forests on organic soils

Information on the capacity of organic soils to capture and store carbon in old-growth forests in the hemiboreal forest zone is scarce and fragmented. However, fine root data can provide valuable insights into soil carbon fluxes. Thus, the aim of the current study was to provide estimates of the fine root biomass (FRB), fine root production (FRP), and fine root turnover (FRT) rate by tree species and other functional groups in old-growth (stand age 131–179 years) forests on mesotrophic organic soils dominated by Scots pine (Pinus sylvestris L.), with (drained mesotrophic organic soil) and without (undrained mesotrophic organic soil) the effects of forest drainage. The sequential soil coring method was used to estimate the FRB and FRP. The total FRB (sum of the FRB of all functional groups) was significantly higher in the undrained sites (6.8±0.3 t ha 1) than in the drained sites (3.97±0.1 t ha 1). The FRB of Scots pine in the undrained forest was significantly higher (1.7±0.1 t ha 1) th..., , , # The effect of drainage on the fine root biomass, production, and turnover in hemiboreal old-growth forests on organic soils

## #GWL\_temp.csv

This file contains data on study site soil temperature and groundwater level

## Description of the data and file structure

Date - Sampling date
Site - Study object name
FT - Forest type (ND - not drained, KS - drained)
Year - Sampling year
Cycle - Sampling campaign number in specific sampling year
PL - Sample plot of study object (1-3)
Groundwater - Groundwater level depth from the ground surface, cm
Soil_temp_10cm - Soil temperature at 10cm depth, °C
Soil_temp_20cm - Soil temperature at 20cm depth, °C
Soil_temp_30cm - Soil temperature at 30cm depth, °C
Soil_temp_40cm - Soil temperature at 40cm depth, °C

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## #Soil\_data.csv

This file contains data of study site soil analysis

## Description of the data and file structure

Year - Sampling year

Date - Sampling date

Place - Study objects name

FT - Forest type (ND - not drained, KS - ...