Fine root tree species distribution in experimental plots Kaltenborn and Satakunta

Usage Rights

This data is Free within projects.

Dataset Abstract

The NIRS spectra of the root samples as well as the calibration mixtures were analysed with a FTIR Spectrometer (Shimadzu IR Prestige-21, Kyoto, Japan), equipped with an integrating sphere (NIR IntegratIR, PIKE Technologies, WI, USA). Each spectrum was recorded as the average of 64 scans over the range between 3800 and 10000 cm-1 (i.e. 1000–2600 nm) with a resolution of 8 cm-1. Five spectra were taken from each sample and averaged before further statistical analyses.
Calibration mixtures were prepared for single species and different combinations of species with incremental additions of approx. 10 % of the respective species components.
Data analyses of the NIRS spectra were performed by partial least squares (PLS) regression using The Unscrambler X (version 10.1, Camo Software AS, Oslo, Norway). Mathematical pre-treatments during data analyses comprised no treatment, 1/x weighting of the original x-data, first and second derivative of Savitzky-Golay smoothing, as well as mean and peak normalisation. The part of the spectrum below 1200 nm was omitted due to background noise. The analyses included multivariate calibration and full cross-validation.

Temporal Extent

Samples taken in August and September 2011

Data columns available in the raw data part of this dataset

site
site
Data group: Experimental site
Values
Kaltenborn
Satakunta
plot_ID
plot_ID
Data group: Experimental plot id
Values
12
11
1
10
13
depth
depth
Unit: cm, except organic
Data group: Soil depth
Keywords: soil depth
Values
org
30–40
10–20
20–30
0–10
Picea
percentage of Picea abies roots in respective soil layer, out of all tree roots
Unit: %
Data group: Species composition
Values
15.579419882170734
16.78200194428441
100
0
25.33430904857214
Pinus
percentage of Pinus sylvestris roots in respective soil layer, out of all tree roots
Unit: %
Data group: Species composition
Keywords: fine roots
Values
18.33914410560989
100
17.58899054695529
16.274645048340236
0
Larix
percentage of Larix sibirica roots in respective soil layer, out of all tree roots
Unit: %
Data group: Species composition
Keywords: fine roots
Values
0
13.139278325104623
14.209589169728476
14.1877995541962
100
Betula
percentage of Betula pendula roots in respective soil layer, out of all tree roots
Unit: %
Data group: Species composition
Keywords: fine roots
Values
13.198324362128409
100
0
13.601406449301168
16.714483036368648
Alnus
percentage of Alnus glutinosa roots in respective soil layer, out of all tree roots
Unit: %
Data group: Species composition
Keywords: fine roots
Values
100
10.366203791828188
11.368029393807344
10.638666050156656
0
Douglas
percentage of Pseusdotsuga menziesii roots in respective soil layer, out of all tree roots
Unit: %
Data group: Species composition
Keywords: fine roots
Values
29.295156751350138
100
26.00531896917789
32.271929951540066
0
Fagus
percentage of Fagus sylvatica roots in respective soil layer, out of all tree roots
Unit: %
Data group: Species composition
Keywords: fine roots
Values
100
10.981047945132074
14.146510180521288
0
13.478528528336406
Quercus
percentage of Quercus sp. roots in respective soil layer, out of all tree roots
Unit: %
Data group: Species composition
Keywords: fine roots
Values
14.005153120033665
0
100
11.897949995693645
16.067612464159332