BEF-China | CSPs: Soil effective cation exchange capacity: depth increments of Comparative Study Plots

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Title:

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

Access rights:

Free for public

Usage rights:

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)

Published:

No information available

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.

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.

Measurement cirumstances:

No information available

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.

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Dataset column

Name:

lab_num

Definition:

laboratory number of laboratory of soil science and geoecology in Tübingen

Unit:

No information available

Datagroup:

Laboratory number of Laboratory of Soil Science and Geoecology in Tübingen

Keywords:

soil base

Values:

3380
3382
3379
3381
3378

Contributors:

Flaiz, S.

Dataset column

Name:

CSP

Definition:

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.

Unit:

No information available

Datagroup:

BEF research plot name

Keywords:

CSP

Values:

CSP04
CSP03
CSP02
CSP01
CSP05

Contributors:

No information available

Dataset column

Name:

sample_num

Definition:

field name of the sample, consisting of the CSP name, the sample type (P for Profile and S for incremental sample) and the depth

Unit:

No information available

Datagroup:

Helper

Keywords:

soil base

Values:

CSP01-S-1-2
CSP01-S-1-5
CSP01-S-1-1
CSP01-S-1-4
CSP01-S-1-3

Contributors:

No information available

Dataset column

Name:

depth_lb

Definition:

depth (lower boundary) of the sample

Unit:

Datagroup:

Soil depth

Keywords:

soil, soil depth

Values:

5
10
20
30
40

Contributors:

No information available

Dataset column

Name:

IE_Na

Definition:

ion equivalent (IE) of element

Unit:

µmolc/g

Datagroup:

Exchangable cations

Keywords:

natrium

Values:

0.12
0.1
0.11
0.13
<0.10

Contributors:

Flaiz, S.

Dataset column

Name:

IE_K

Definition:

ion equivalent (IE) of element

Unit:

µmolc/g

Datagroup:

Exchangable cations

Keywords:

kalium

Values:

0.67
0.69
0.68
0.61
0.71

Contributors:

Flaiz, S.

Dataset column

Name:

IE_Mg

Definition:

ion equivalent (IE) of element

Unit:

µmolc/g

Datagroup:

Exchangable cations

Keywords:

magnesium

Values:

0.28
0.34
0.2
0.35
0.37

Contributors:

Flaiz, S.

Dataset column

Name:

IE_Ca

Definition:

ion equivalent (IE) of element

Unit:

µmolc/g

Datagroup:

Exchangable cations

Keywords:

calcium

Values:

0.23
0.24
0.29
0.31
0.33

Contributors:

Flaiz, S.

Dataset column

Name:

IE_Mn

Definition:

ion equivalent (IE) of element

Unit:

µmolc/g

Datagroup:

Exchangable cations

Keywords:

manganese

Values:

0.06
0.07
0.03
0.04
0.08

Contributors:

Flaiz, S.

Dataset column

Name:

IE_Fe

Definition:

ion equivalent (IE) of element

Unit:

µmolc/g

Datagroup:

Exchangable cations

Keywords:

Values:

0.06
0.03
0.04
<0.03
0.05

Contributors:

Flaiz, S.

Dataset column

Name:

IE_Al

Definition:

ion equivalent (IE) of element

Unit:

µmolc/g

Datagroup:

Exchangable cations

Keywords:

aluminium

Values:

111.84
20.49
18.68
19.5
134.67

Contributors:

Flaiz, S.

Dataset column

Name:

IE_H

Definition:

ion equivalent (IE) of element

Unit:

µmolc/g

Datagroup:

Exchangable cations

Keywords:

hydrogen

Values:

0.4
0.8
0.6
0.7
0.5

Contributors:

Flaiz, S.

Dataset column

Name:

CECeff

Definition:

effective cation exchange capacity

Unit:

µmolc/g

Datagroup:

Exchangable cations

Keywords:

cation exchange capacity

Values:

159.1
126.7
23.5
122.2
126.8

Contributors:

Flaiz, S.

Dataset column

Name:

Definition:

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

Datagroup:

Exchangable cations

Keywords:

acidity

Values: