Element analysis of phosphorous (P), calcium (Ca), potassium (K), sodium (Na) and magnesium (Mg) in plants (Main Experiment, year 2007)

DOI

This data set contains measurements of P, Ca, K, Na and Mg concentrations in aboveground plant biomass. 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.Aboveground plant biomass was harvested twice in May and August at estimated peak standing biomass before mowing. Plants were clipped at 3 cm above ground level in four (three in May) rectangles of 20 x 50 cm size per plot. All material was sorted to species, weeds and rest (dead). Samples were dried at 70 °C for at least 48 h and weeds and rest were thrown away. All other material was pooled per plot and harvest, shredded and milled for chemical analyses. Each sample was digested with HNO3 at 200 °C and at about 600-700 MPa using the microwave-assisted high pressure digestion unit (Mars 5 Express, CEM, Lintfort, Germany). Phosphorus concentrations were determined in a Continuous Flow Analyzer, AA3-system (Bran and Lübbe, Hamburg-Norderstedt, Germany). For Ca, K, Na and Mg measurement, atom absorption spectroscopy (AAS, AS240FS Fast Sequential AAS, Varian, Palo Alto, USA) was used.

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 element concentrations in plants 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 (DOI XXX)

Identifier
DOI https://doi.org/10.1594/PANGAEA.887345
Related Identifier References https://doi.org/10.1371/journal.pone.0058179
Related Identifier References https://doi.org/10.1016/j.baae.2014.02.001
Related Identifier References https://doi.org/10.1007/s00442-012-2589-0
Related Identifier References https://doi.org/10.1002/ecs2.1619
Related Identifier References https://doi.org/10.2134/jeq2006.0217
Related Identifier References https://doi.org/10.1016/j.geoderma.2011.09.012
Related Identifier References https://doi.org/10.1007/s00442-016-3647-9
Related Identifier IsDocumentedBy https://store.pangaea.de/Publications/Jena_Experiment/PlotInformationMainExperiment.txt
Related Identifier IsDocumentedBy https://store.pangaea.de/Publications/Jena_Experiment/TreatmentDefinitionsJuly2012.pdf
Related Identifier IsDocumentedBy https://doi.org/10.1078/1439-1791-00216
Related Identifier IsDocumentedBy https://doi.org/10.1016/j.baae.2017.06.002
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.887345
Provenance
Creator Oelmann, Yvonne ORCID logo; Wilcke, Wolfgang ORCID logo
Publisher PANGAEA
Publication Year 2018
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 3772 data points
Discipline History; Humanities
Spatial Coverage (11.611 LON, 50.946 LAT); Thuringia, Germany
Temporal Coverage Begin 2007-01-01T00:00:00Z
Temporal Coverage End 2007-12-31T00:00:00Z