Main Experiment: Soil CNS and pH analyses of depth increments on Site A (2010-2011)

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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:

Kühn, P., Scholten, T., and Seitz, S. (2016): Main Experiment: Soil CNS and pH analyses of depth increments on Site A (2010-2011). (Accessed through URL: http://china.befdata.biow.uni-leipzig.de/datasets/331)

Dataset Abstract

Soil chemical laboratory analyses of all plots on Site A. Contents of carbon, nitrogen and sulphur as well as pH-values (in H2O and KCl) of six depth increments per plot.

Dataset Design

Six depth increments were taken from systematic corings: Nine corings per plot were pooled to one sample per depth increment (0-5, 5-10, 10-20, 20-30, 30-40, 40-50 cm). Samples were air-dried, sieved < 2mm, grinded using a ball mill. Subsamples of 40 mg were used for measurements with an elemental analyzer (Vario EL III, Elementar, Hanau, Germany).

Spatial Extent

Experimental Site A
29°08'-29°11'N
117°90'-117°93'E

Temporal Extent

Samples were collected from 2010 to 2011. Lab analyses were carried out from 2010 to 2012.

Taxonomic Extent

No organisms

Data Analysis

pH (KCl) is the maximum potential acidity under present soil conditions.
pH (H2O) is the current acidity.

Paper proposal submissions

Published

2013

Data columns available in the raw data part of this dataset

plot_number
Plot Letter Code; Datagroup description: Plot name (letter, number code)
Data group: Plot name Main experiment (letter, number code)
Keywords: Site A, location
Values
C31
B35
B38/C38
B34
B36/C36
PTAG
plot code, BEF research plot name, 6 digits with "p" in front; Datagroup description: Research plots of the Biodiversity - Ecosystem functioning experiment (BEF-China). Main Experiment plots have a size of 1 mu, which is about 25x25m^2 in horizontal projection. Pilot Study Plots have a size of 1x1 m^2. Research plots on the main experiment have a "p" in front of their IDs and then a 6 digit code: Plots in the main sites A and B are named according to their position in the original spreadsheet, in which they were designed. They consist of 6 digits: _1st digit_: Site (1:A, 2:B), _digit 2and3_: southwards row: as in spreadsheets the rows are named from the top to the bottom; _digit 4 and 5_: westward column: as in the original spreadsheet, but the letters are converted to numbers (A=01, B=02); _6th digit_: indicator, if the plot has been shifted a quarter mu. Example: "p205260": "p" means that this is a plot that is specified. "2" means, that we are at site B. Now the coordinates of the south - west corner: "0526". Since "e" is the fifth letter of the alphabet, this is Plot E26. The last digit "0" means that this plot was not moved by a quarter of a Mu, as some sites in Site B. The 6th digit can also indicate the subplot within the plot. "5", "6", "7", "8" indicate the northwest, northeast, southeast, and southwest quarter plot respectively.; Datagroup description: Research 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 (29º8'18" – 29º17'29" N, 118º2'14" – 118º11'12" E, Zhejiang Province Southeast China), having a size of 30x30m^2, measured on the ground. Main Experiment plots have a size of 1 mu, which is about 25x25m^2 in horizontal projection. Pilot Study Plots have a size of 1x1 m^2. Research plots on the main experiment have a "p" in front of their IDs and then a 6 digit code: Plots in the main sites A (29°07'28.2"N 117°54'27.5"E) and B (29°05'06.8"N 117°55'44.4"E) are named according to their position in the original spreadsheet, in which they were designed. They consist of 6 digits: _1st digit_: Site (1:A, 2:B), _digit 2and3_: southwards row: as in spreadsheets the rows are named from the top to the bottom; _digit 4 and 5_: westward column: as in the original spreadsheet, but the letters are converted to numbers (A=01, B=02); _6th digit_: indicator, if the plot has been shifted a quarter mu. Example: "p205260": "p" means that this is a plot that is specified. "2" means, that we are at site B. Now the coordinates of the south - west corner: "0526". Since "e" is the fifth letter of the alphabet, this is Plot E26. The last digit "0" means that this plot was not moved by a quarter of a Mu, as some sites in Site A. The 6th digit can also indicate the subplot within the plot. "5", "6", "7", "8" indicate the northwest, northeast, southeast, and southwest quarter plot respectively. Morover, Plots from the main experiment may be labelled in the more ambiguous form of e.g. A32. This indicates a plat either on Site A (29°07'28.2"N 117°54'27.5"E) or Site B (29°05'06.8"N 117°55'44.4"E) of the main experiment. This value only becomes a unique identifier if supported with the "site" information from another cell. Plots labelled in the form of "1_AO1" or "g1_AO1" or "pilot1_AO1" belong to the "Pilot Experiment" (approx location: 29°06'20.2"N 117°55'12.1"E, Jiangxi Province)
Data group: BEF research plot name
Keywords: Site A, location
Values
p102340
p102361
p102350
p103310
p102381
sample_num
field name of the sample; Datagroup description: Helper
Data group: Helper
Keywords: soil base
Values
EXPA-S-B34-5
EXPA-S-B34-4
EXPA-S-B34-2
EXPA-S-B34-1
EXPA-S-B34-3
* Geißler, C., Goebes, P. also contributed to this column.
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
4860
4862
4859
4861
4858
* Flaiz, S. also contributed to this column.
depth_lb
depth (lower boundary) of the sample; Datagroup description: Soil depth
Unit: cm
Data group: Soil depth
Keywords: soil, soil depth
Values
40
20
5
10
30
pH_H2O
pH value, mean from two values determined by H20 method. solutionH20 : soil = 2.5:1; Datagroup description: pH value; Instrumentation: electrodes Sentix 81 and WTW pH-meter (derived from datagroup); Instrumentation: electrodes Sentix 81 and WTW pH-meter (derived from datagroup)
Unit: pH
Data group: pH value
Keywords: pH
Values
4.2
4.17
4.18
4.19
4.09
pH_KCl
pH value, mean from two values determined in 1 M KCL; Datagroup description: pH value; Instrumentation: electrodes Sentix 81 and WTW pH-meter (derived from datagroup); Instrumentation: electrodes Sentix 81 and WTW pH-meter (derived from datagroup)
Unit: pH
Data group: pH value
Keywords: pH
Values
3.36
3.45
3.42
3.41
3.37
N_t
total organic nitrogen content; Datagroup description: Nitrogen; Instrumentation: Elemental Analyzer (derived from datagroup); Instrumentation: Elemental Analyzer (derived from datagroup)
Unit: Mass-%
Data group: Nitrogen
Keywords: SON, nitrogen
Values
0.03523886948823929
0.04447492957115173
0.02791588567197323
0.044117990881204605
0.039155829697847366
C_t
total soil organic carbon content; Datagroup description: Carbon content
Unit: Mass-%
Data group: Carbon
Keywords: SOC, carbon
Values
0.24770383536815643
0.22639042139053345
0.26881352066993713
0.12686970829963684
0.2597426176071167
S_t
total sulphur content; Datagroup description: Sulphur; Instrumentation: heat combustion and thermal conductivity detection using a CNS-Elementar analyser, varioEL III from Elementar (derived from datagroup); Instrumentation: heat combustion and thermal conductivity detection using a CNS-Elementar analyser, varioEL III from Elementar (derived from datagroup); Datagroup description: S content
Unit: Mass-%
Data group: Sulphur
Keywords: S
Values
0.050158750265836716
0.05122085288167
< 0.05
0.05011679604649544
0.05051339045166969
C_N
ratio organic carbon/organic nitrogen
Unit: ratio
Data group: Carbon Nitrogen ratio
Keywords: C/N ratio
Values
10.000896421769447
10.015844882086306
10.010453196999599
10.004068699069965
10.011511003002337