Citation:

PANGAEA.885439

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Abstract:

This data set contains measurements of soil bulk density in different depth layers. Data presented here is from the Main Experiment plots of a large grassland biodiversity experiment (the Jena Experiment; see further details below). In the main experiment, 82 grassland plots of 20 x 20 m were established from a pool of 60 species belonging to four functional groups (grasses, legumes, tall and small herbs). In May 2002, varying numbers of plant species from this species pool were sown into the plots to create a gradient of plant species richness (1, 2, 4, 8, 16 and 60 species) and functional richness (1, 2, 3, 4 functional groups). Plots were maintained in general by bi-annual weeding and mowing. Since 2010, plot size was reduced to 5 x 6 m and plots were weeded three times per year.

Soil bulk density was determined in spring from undisturbed soil samples to a depth of 100 cm. Soil cores were taken with a metal bulk density ring of ten cm height and partly pooled to obtain depth increments with a resolution of ten cm from ground level to 40 cm depth and 20 cm from 40 cm to 100 cm depth. The bulk material was passed through a sieve with 2 mm mesh size, dried to constant weight at 105 °C and subsequently weighed to calculate the density.

In 2002, bulk density was measured at 27 locations before plot establishment. Two of them are now reference plots and thus not included in this data set. The chosen plots represented a spatial gradient across the field site and resulted in average soil bulk density estimations at the beginning of the experiment.

Related to:

Fischer, Christine; Tischer, Jana; Roscher, Christiane; Eisenhauer, Nico; Ravenek, Janneke; Gleixner, Gerd; Attinger, Sabine; Jensen, Britta; de Kroon, Hans; Mommer, Liesje; Scheu, Stefan; Hildebrandt, Anke (2014): Plant species diversity affects infiltration capacity in an experimental grassland through changes in soil properties. Plant and Soil, 397(1-2), 1-16, https://doi.org/10.1007/s11104-014-2373-5

Steinbeiss, Sibylle; Bessler, Holger; Engels, Christof; Temperton, Vicky; Buchmann, Nina; Roscher, Christiane; Kreutziger, Yvonne; Baade, Jussi; Habekost, Maike; Gleixner, Gerd (2008): Plant diversity positively affects short-term soil carbon storage in experimental grasslands. Global Change Biology, 14, 2937-2949, https://doi.org/10.1111/j.1365-2486.2008.01697.x

Further details:

Plot information of the Jena Main Experiment

Treatment description

Project(s):

The Jena Experiment (JenExp)

Coverage:

Latitude: 50.946100 * Longitude: 11.611300

Date/Time Start: 2002-01-01T00:00:00 * Date/Time End: 2002-12-31T00:00:00

Minimum DEPTH, soil: 0.05 m * Maximum DEPTH, soil: 0.90 m

Event(s):

JenExp_2002 (Jena Experiment 2002) * Latitude: 50.946100 * Longitude: 11.611300 * Date/Time Start: 2002-01-01T00:00:00 * Date/Time End: 2002-12-31T00:00:00 * Location: Thuringia, Germany * Method/Device: Experiment (EXP)

Comment:

The main experiment on the field site of the Jena Experiment comprises a split-plot design in which additional treatments (e.g. no weeding allowing for invasion of other species, or application of fertilizer) have been applied to subplots along the outer margin of the plots (see Treatment description in the section "further details"). While in this dataset only data from the core area (mown and weeding of all none-sown species twice a year, no additional treatments) is reported, all potential treatments are listed as the first parameters in the data file to guarantee compatibility with other datasets that include different treatments.

There are two types of missing values contained in the dataset. Empty cells represent missing values that result from the design of the experiment when the respective value does not occur and could thus not be measured. For example, in the columns of species-specific biomass cells are left blank, when the species was not sown into the respective plot. Missing values that resulted from methodological problems, sampling errors, or lost samples/data are marked with "-9999".

This dataset is part of a collection of measurements of physical and chemical soil properties in the Jena Experiment. Similar data from other experiments (e.g. Main Experiment, Dominance Experiment; see details above), other years, or other methods quantifying related data might be available (https://doi.pangaea.de/10.1594/PANGAEA.885439).

Parameter(s):

#	Name	Short Name	Unit	Method/Device	Comment
1	Experimental plot	Experimental plot			Detailed explanations of plots and the plant diversity gradient are provided in the section "further details".
2	Density, dry bulk	DBD	g/cm³	Physical analysis method (DIN 19683, sheet 12)	Measured on plot level
3	Depth, soil, minimum	Depth soil min	m
4	Depth, soil, maximum	Depth soil max	m
5	DEPTH, soil	Depth soil	m		Geocode
6	Date/time start	Date/time start			of sampling campaign
7	Date/time end	Date/time end			of sampling campaign
8	Treatment: mowing	T:mow			Detailed explanations of treatments are provided in the section "further details".
9	Treatment: weeding	T:weed			Detailed explanations of treatments are provided in the section "further details".
10	Treatment: weeding history	T:weed hist			Detailed explanations of treatments are provided in the section "further details".
11	Treatment: seed addition	T:seed add			Detailed explanations of treatments are provided in the section "further details".
12	Treatment: fertilizing	T:fert			Detailed explanations of treatments are provided in the section "further details".
13	Treatment: drought	T:drought			Detailed explanations of treatments are provided in the section "further details".
14	Treatment: aboveground: pesticide	T:abovegr pest			Detailed explanations of treatments are provided in the section "further details".
15	Treatment: below pesticide	T:below pest			Detailed explanations of treatments are provided in the section "further details".
16	Treatment: molluscide	T:mollus			Detailed explanations of treatments are provided in the section "further details".
17	Treatment: nematicide	T:nema			Detailed explanations of treatments are provided in the section "further details".
18	Treatment: eartworm exclosure	T:eartworm excl			Detailed explanations of treatments are provided in the section "further details".
19	Treatment: phytometers	T:phyto			Detailed explanations of treatments are provided in the section "further details".
20	Treatment: special	T:special			Detailed explanations of treatments are provided in the section "further details".

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

10507 data points

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