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

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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:

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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:

B36/C36
B38/C38
B34
C31
B35

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:

p102381
p102361
p103310
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-B34-5
EXPA-S-B34-4
EXPA-S-B34-2
EXPA-S-B34-1
EXPA-S-B34-3

Contributors:

Geißler, C., Goebes, P.

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:

4862
4859
4860
4861
4858

Contributors:

Flaiz, S.

Dataset column

Name:

depth_lb

Definition:

depth (lower boundary) of the sample; Datagroup description: Soil depth

Unit:

Datagroup:

Soil depth

Keywords:

soil, soil depth

Values:

20
40
30
10
5

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:

Datagroup:

pH value

Keywords:

Values:

4.2
4.17
4.18
4.19
4.09

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:

Datagroup:

pH value

Keywords:

Values:

3.42
3.37
3.36
3.45
3.41

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:

0.044117990881204605
0.04447492957115173
0.039155829697847366
0.03523886948823929
0.02791588567197323

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:

0.2597426176071167
0.26881352066993713
0.22639042139053345
0.12686970829963684
0.24770383536815643

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:

Values: