Fine root biomass in exploratory plots

Usage Rights

This data is Free within projects.

Dataset Abstract

Soil cores taken from each subplot of each plot (i.e. 9 per plot), if possible down to 40 cm (Poland), but in other countries it was only possible to 20 cm (except Spain only 10 cm). Forest floor samples were taken separately from the soil cores. The cores were dividied into layers of 10 cm, and respective layers of each plot were pooled together, rendering one forest floor samples and 1 to 4 mineral samples per plot. Living fine roots (< 2 mm) were extrtacted from these samples, and classified as tree or understorey roots. After drying at 40 degrees the roots were weighed, and the biomass was calculated as g roots per m2, taken into account the stoniness of the mineral soil at each plot, as assessed by the metal rod penetration method (Tamminen & Starr 1994).

Stoniness was calculated by determining the average penetration depth of a metal rod into the mineral soil (max 30 cm), estimating with the equation presented by Tamminen & Starr (1994): Buld density of forested mineral soils. Silva Fennica 28: 53-60.

Temporal Extent

Samples taken between May 2012 and October 2012

Data columns available in the raw data part of this dataset

plot_ID
plot_ID
Data group: Exploratory plot id
Alert Sample values are not displayed because this column hasn't been approved yet.
depth
soil depth, expressed as organic (forest floor), and horizons divided by intervals of 10 cm (in some cases 5 cm)
Unit: cm, except organic
Data group: Soil depth
Keywords: soil depth
Values
0–10
20–30
0–5
10–20
30–40
root_type
root type: fine roots of trees or understorey (others)
Data group: Root type
Values
others
trees
biomass
fine root biomass, expressed as g per m2
Unit: g m-2
Data group: Biomass
Values
0.05445083305138741
0.04532939159933462
0.07138341850593752
0
0.04546354592891768