CSPs: Soil effective cation exchange capacity: depth increments of Comparative Study Plots

Usage Rights

This data is Free for public.

Permission is granted to anybody to access, use and publish all open for public data freely. The commercial use of any data is prohibited. The quality and completeness of data cannot be guaranteed. Users employ these data at their own risk. In order to make attribution of use for owners of the data possible, the identifier of ownership of data must be retained with every data record. Users must publicly acknowledge, in conjunction with the use of the data, the data owners. Cite the data as follows: Geißler, C., Scholten, T. and Kühn, P. (2011): Effective cation exchange capacity of soils: depth increments of 27 Comparative Study Plots . BEF-China data portal (Accessed through URL http://china.befdata.biow.uni-leipzig.de/datasets/148)

Dataset Abstract

Soil chemical laboratory analyses of all 27 comparative study plots. Contents of exchangable Na, K, Ca, Mg, Fe, Al, H, effective Cation Exchange Capacity (CECeff; extraction with 1 M NH4Cl) and base saturation (BS) of six depth increments per CSP. Total depth is 50 cm. Single element concentrations might be interesting if there are signs for toxic reactions in plants. Base saturation (sum of Na, K, Ca, Mg in % of CECeff). CECeff is the sum of all measured elements including H.

Dataset Design

Depth increments were taken from systematic corings: 1 coring per subplot means 9 corings per CSP. Samples were bulked from the 9 corings to one sample per depth increment (0-5, 5-10, 10-20, 20-30, 30-40, 40-50 cm.), so that 6 samples exist per CSP.

Spatial Extent

The Gutianshan National Nature Reserve (NNR) is located in the western part of Zhejiang Province (29º8'18" – 29º17'29" N, 118º2'14" – 118º11'12" E, Fig. 1). The Gutianshan NNR has an area of approximately 81 km2. From 27 comparative study plots (CSPs) soil samples were taken in 6 depth increments per CSP

Temporal Extent

Samples were collected 2008 and 2009. Lab analyses were carried from 2009 to 2011

Taxonomic Extent

No organisms were sampled.

Data Analysis

Base saturation (sum of Na, K, Ca, Mg in % of CECeff). CECeff is the sum of all measured elements including H. EA (Exchange acidity) is rarely used and is primarily associated with exchangable Al and H ions.

Paper proposal submissions

Published

2012

Data columns available in the raw data part of this dataset

lab_num
laboratory number of laboratory of soil science and geoecology in Tübingen
Data group: Laboratory number of Laboratory of Soil Science and Geoecology in Tübingen
Keywords: soil base
Values
3378
3382
3379
3381
3380
* Flaiz, S. also contributed to this column.
CSP
name of the CSP in the Nature ReserveBEF research plot nameReasearch plots of the Biodiversity - Ecosystem functioning experiment (BEF-China). There are three main sites for research plots in the BEF Experiment: Comparative Study Plots (CSP) in the Gutianshan Nature Reserve, having a size of 30x30m^2, measured on the ground.
Data group: BEF research plot name
Keywords: CSP
Values
CSP05
CSP03
CSP04
CSP02
CSP01
sample_num
field name of the sample, consisting of the CSP name, the sample type (P for Profile and S for incremental sample) and the depth
Data group: Helper
Keywords: soil base
Values
CSP01-S-1-2
CSP01-S-1-5
CSP01-S-1-3
CSP01-S-1-4
CSP01-S-1-1
depth_lb
depth (lower boundary) of the sample
Unit: cm
Data group: Soil depth
Keywords: soil, soil depth
Values
30
5
20
40
10
IE_Na
ion equivalent (IE) of element
Unit: µmolc/g
Data group: Exchangable cations
Keywords: natrium
Values
<0.10
0.1
0.12
0.11
0.13
* Flaiz, S. also contributed to this column.
IE_K
ion equivalent (IE) of element
Unit: µmolc/g
Data group: Exchangable cations
Keywords: kalium
Values
0.68
0.71
0.69
0.61
0.67
* Flaiz, S. also contributed to this column.
IE_Mg
ion equivalent (IE) of element
Unit: µmolc/g
Data group: Exchangable cations
Keywords: magnesium
Values
0.37
0.2
0.35
0.28
0.34
* Flaiz, S. also contributed to this column.
IE_Ca
ion equivalent (IE) of element
Unit: µmolc/g
Data group: Exchangable cations
Keywords: calcium
Values
0.29
0.23
0.24
0.31
0.33
* Flaiz, S. also contributed to this column.
IE_Mn
ion equivalent (IE) of element
Unit: µmolc/g
Data group: Exchangable cations
Keywords: manganese
Values
0.04
0.08
0.03
0.06
0.07
* Flaiz, S. also contributed to this column.
IE_Fe
ion equivalent (IE) of element
Unit: µmolc/g
Data group: Exchangable cations
Keywords: Fe
Values
0.05
0.06
<0.03
0.04
0.03
* Flaiz, S. also contributed to this column.
IE_Al
ion equivalent (IE) of element
Unit: µmolc/g
Data group: Exchangable cations
Keywords: aluminium
Values
20.49
18.68
19.5
111.84
134.67
* Flaiz, S. also contributed to this column.
IE_H
ion equivalent (IE) of element
Unit: µmolc/g
Data group: Exchangable cations
Keywords: hydrogen
Values
0.4
0.7
0.6
0.8
0.5
* Flaiz, S. also contributed to this column.
CECeff
effective cation exchange capacity
Unit: µmolc/g
Data group: Exchangable cations
Keywords: cation exchange capacity
Values
23.5
126.7
122.2
126.8
159.1
* Flaiz, S. also contributed to this column.
EA
exchange acidity: This acidity is primarily associated with exchangable Al and H ions. Once released to the soil solution, the aluminium hydrolyzes to form additional H ions.
Unit: µmolc/g
Data group: Exchangable cations
Keywords: acidity
Values
20.9
147.3
119.9
19.9
105.7
* Flaiz, S. also contributed to this column.
BS
base saturation, ratio between 0 and 100 %, sum of IEs(Na, K, Mg, Ca); as percentage of CECeff
Unit: %
Data group: Base saturation
Keywords: base saturation
Values
10.4
10.6
10.8
10.1
10.7
* Flaiz, S. also contributed to this column.