Citation:

PANGAEA.854372

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Abstract:

As an estimate of plant‐available N, this data set contains measurements of inorganic nitrogen (NO3‐N and NH4‐N, the sum of which is termed mineral N or Nmin) determined by extraction with 1 M KCl solution of soil samples 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 by bi-annual weeding and mowing.

Soil sampling and analysis: Five soil cores (diameter 0.01 m) were taken at a depth of 0 to 0.15 m of the mineral soil from each of the experimental plots in March 2006. In October 2006 also the plots of the management experiment, that altered mowing frequency and fertilized subplots (see further details below) were sampled. Measurements from the management experiment are separated into 0 to 0.08 m and 0.08 to 0.15 m. Samples of the soil cores per plot (subplots in case of the management experiment) were pooled during each sampling campaign. NO3‐N and NH4‐N concentrations were determined by extraction of soil samples with 1 M KCl solution and were measured in the soil extract with a Continuous Flow Analyzer (CFA, AutoAnalyzer, Seal, Burgess Hill, United Kingdom).

Related to:

Oelmann, Yvonne; Buchmann, Nina; Gleixner, Gerd; Habekost, Maike; Roscher, Christiane; Rosenkranz, Stephan; Schulze, Ernst-Detlef; Steinbeiss, Sibylle; Temperton, Vicky; Weigelt, Alexandra; Weisser, Wolfgang W; Wilcke, Wolfgang (2011): Plant diversity effects on aboveground and belowground N pools in temperate grassland ecosystems: Development in the first 5 years after establishment. Global Biogeochemical Cycles, 25(2), n/a-n/a, https://doi.org/10.1029/2010GB003869

Oelmann, Yvonne; Wilcke, Wolfgang; Temperton, Vicky; Buchmann, Nina; Roscher, Christiane; Schumacher, Jens; Schulze, Ernst-Detlef; Weisser, Wolfgang W (2007): Soil and Plant Nitrogen Pools as Related to Plant Diversity in an Experimental Grassland. Soil Science Society of America Journal, 71(3), 720, https://doi.org/10.2136/sssaj2006.0205

Further details:

Plot information of the Jena Main Experiment

Treatment description

Roscher, Christiane; Schumacher, Jens; Baade, Jussi; Wilcken, Sara; Gleixner, Gerd; Weisser, Wolfgang W; Schmid, Bernhard; Schulze, Ernst-Detlef (2004): The role of biodiversity for element cycling and trophic interactions: an experimental approach in a grassland community. Basic and Applied Ecology, 5(2), 107-121, https://doi.org/10.1078/1439-1791-00216

Project(s):

The Jena Experiment (JenExp)

Coverage:

Latitude: 50.946100 * Longitude: 11.611300

Date/Time Start: 2006-01-01T00:00:00 * Date/Time End: 2006-12-31T00:00:00

Minimum DEPTH, soil: 0.040 m * Maximum DEPTH, soil: 0.115 m

Event(s):

JenExp_2006 (Jena Experiment 2006) * Latitude: 50.946100 * Longitude: 11.611300 * Date/Time Start: 2006-01-01T00:00:00 * Date/Time End: 2006-12-31T00:00:00 * Location: Thuringia, Germany * Method/Device: Experiment (EXP)

Comment:

In addition to measurements of mineral nitrogen from KCl-extractions of soil samples, measurements of total nitrogen determined from dried soil samples and measurements of dissolved nitrogen in soil solution are available.

This datasets is part of a time series of soil nitrogen measurements in the Main Experiment since 2002 (doi:10.1594/PANGAEA.854372).

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	Depth, soil, minimum	Depth soil min	m
3	Depth, soil, maximum	Depth soil max	m
4	DEPTH, soil	Depth soil	m		Geocode
5	Date/time start	Date/time start			of sampling campaign
6	Date/time end	Date/time end			of sampling campaign
7	Treatment: mowing	T:mow			Detailed explanations of treatments are provided in the section "further details".
8	Treatment: weeding	T:weed			Detailed explanations of treatments are provided in the section "further details".
9	Treatment: weeding history	T:weed hist			Detailed explanations of treatments are provided in the section "further details".
10	Treatment: seed addition	T:seed add			Detailed explanations of treatments are provided in the section "further details".
11	Treatment: fertilizing	T:fert			Detailed explanations of treatments are provided in the section "further details".
12	Treatment: drought	T:drought			Detailed explanations of treatments are provided in the section "further details".
13	Treatment: aboveground: pesticide	T:abovegr pest			Detailed explanations of treatments are provided in the section "further details".
14	Treatment: below pesticide	T:below pest			Detailed explanations of treatments are provided in the section "further details".
15	Treatment: molluscide	T:mollus			Detailed explanations of treatments are provided in the section "further details".
16	Treatment: nematicide	T:nema			Detailed explanations of treatments are provided in the section "further details".
17	Treatment: eartworm exclosure	T:eartworm excl			Detailed explanations of treatments are provided in the section "further details".
18	Treatment: phytometers	T:phyto			Detailed explanations of treatments are provided in the section "further details".
19	Treatment: special	T:special			Detailed explanations of treatments are provided in the section "further details".
20	Ammonium per unit sediment mass	NH4/sed	µg/g	KCl-extraction
21	Nitrate per unit sediment mass	NO3/sed	µg/g	KCl-extraction

License:

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

Size:

18040 data points

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