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Title:
Main Experiment: Soil CNS and pH analyses of depth increments on Site A (2010-2011)
Access rights:
Free for public
Usage rights:
No information available
Published:
No information available
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.
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
Measurement cirumstances:
No information available
Data analysis:
pH (KCl) is the maximum potential acidity under present soil conditions. pH (H2O) is the current acidity.

Filter:
Dataset column

Name:
plot_number
Definition:
Plot Letter Code; Datagroup description: Plot name (letter, number code)
Unit:
No information available
Datagroup:
Plot name Main experiment (letter, number code)
Keywords:
Site A, location
Values:
B34
B36/C36
B35
B38/C38
C31
Contributors:
No information available

Dataset column

Name:
PTAG
Definition:
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)
Unit:
No information available
Datagroup:
BEF research plot name
Keywords:
Site A, location
Values:
p103310
p102381
p102361
p102350
p102340
Contributors:
No information available

Dataset column

Name:
sample_num
Definition:
field name of the sample; Datagroup description: Helper
Unit:
No information available
Datagroup:
Helper
Keywords:
soil base
Values:
EXPA-S-B34-1
EXPA-S-B34-3
EXPA-S-B34-4
EXPA-S-B34-5
EXPA-S-B34-2
Contributors:

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:
4860
4858
4862
4859
4861
Contributors:

Dataset column

Name:
depth_lb
Definition:
depth (lower boundary) of the sample; Datagroup description: Soil depth
Unit:
cm
Datagroup:
Soil depth
Keywords:
soil, soil depth
Values:
30
40
5
20
10
Contributors:
No information available

Dataset column

Name:
pH_H2O
Definition:
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
Datagroup:
pH value
Keywords:
pH
Values:
4.18
4.09
4.19
4.2
4.17
Contributors:
No information available

Dataset column

Name:
pH_KCl
Definition:
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
Datagroup:
pH value
Keywords:
pH
Values:
3.42
3.41
3.45
3.36
3.37
Contributors:
No information available

Dataset column

Name:
N_t
Definition:
total organic nitrogen content; Datagroup description: Nitrogen; Instrumentation: Elemental Analyzer (derived from datagroup); Instrumentation: Elemental Analyzer (derived from datagroup)
Unit:
Mass-%
Datagroup:
Nitrogen
Keywords:
SON, nitrogen
Values:
0.03523886948823929
0.04447492957115173
0.044117990881204605
0.02791588567197323
0.039155829697847366
Contributors:
No information available

Dataset column

Name:
C_t
Definition:
total soil organic carbon content; Datagroup description: Carbon content
Unit:
Mass-%
Datagroup:
Carbon
Keywords:
SOC, carbon
Values:
0.22639042139053345
0.24770383536815643
0.26881352066993713
0.12686970829963684
0.2597426176071167
Contributors:
No information available

Dataset column

Name:
S_t
Definition:
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-%
Datagroup:
Sulphur
Keywords:
S
Values:
0.05122085288167
0.050158750265836716
0.05051339045166969
0.05011679604649544
< 0.05
Contributors:
No information available

Dataset column

Name:
C_N
Definition:
ratio organic carbon/organic nitrogen
Unit:
ratio
Datagroup:
Carbon Nitrogen ratio
Keywords:
C/N ratio
Values:
10.011511003002337
10.015844882086306
10.010453196999599
10.004068699069965
10.000896421769447
Contributors:
No information available

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Peter
Kühn

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