Total nitrogen from solid phase in the Jena Experiment (Main Experiment up to 30cm depth, year 2008)

DOI

This data set contains measurements of total nitrogen 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: Stratified soil sampling was performed in April 2008 to a depth of 30 cm. Three independent samples per plot were taken using a split tube sampler with an inner diameter of 4.8 cm (Eijkelkamp Agrisearch Equipment, Giesbeek, the Netherlands). Soil samples were segmented to a depth resolution of 5 cm in the field, giving six depth subsamples per core, and made into composite samples per depth. Sampling locations were less than 30 cm apart from sampling locations in other years. Samples were dried at 40°C. All soil samples were passed through a sieve with a mesh size of 2 mm. Because of much higher proportions of roots in the soil, the samples were further sieved to 1 mm according to common root removal methods. No additional mineral particles were removed by this procedure. Total nitrogen concentration was analyzed on ball-milled subsamples (time 4 min, frequency 30 s-1) by an elemental analyzer at 1150°C (Elementaranalysator vario Max CN; Elementar Analysensysteme GmbH, Hanau, Germany).

In 2002 and 2007, measurements of total nitrogen in a depth of up to 1m (depth resolution of 5 cm giving 20 depth subsamples per core) are available. In addition to measurements of total nitrogen determined from dried soil samples, measurement of dissolved nitrogen in soil solution and measurements of mineral nitrogen from KCl-extractions of soil samples 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).

Identifier
DOI https://doi.org/10.1594/PANGAEA.854362
Related Identifier https://doi.org/10.1594/PANGAEA.854372
Related Identifier https://store.pangaea.de/Publications/Jena_Experiment/PlotInformationMainExperiment.txt
Related Identifier https://doi.org/10.1111/j.1365-2486.2008.01697.x
Related Identifier https://store.pangaea.de/Publications/Jena_Experiment/TreatmentDefinitionsJuly2012.pdf
Related Identifier https://doi.org/10.1078/1439-1791-00216
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.854362
Provenance
Creator Habekost, Maike; Lange, Markus ORCID logo; Gleixner, Gerd ORCID logo
Publisher PANGAEA
Publication Year 2015
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Resource Type Dataset
Format text/tab-separated-values
Size 9348 data points
Discipline History; Humanities
Spatial Coverage (11.611 LON, 50.946 LAT); Thuringia, Germany
Temporal Coverage Begin 2008-01-01T00:00:00Z
Temporal Coverage End 2008-12-31T00:00:00Z