Oelmann, Yvonne; Rosenkranz, Stephan; Wilcke, Wolfgang (2015): Dissolved phosphorus in soil solution of the Jena Experiment (Main Experiment, year 2002) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.854457, In: Oelmann, Yvonne; Wilcke, Wolfgang; Rosenkranz, Stephan; Luo, Guangjuan; Guderle, Marcus; Meyer, Sebastian Tobias (2015): Collection of data on particulate and dissolved soil phosphorus in the Jena Experiment (Main Experiment, time series since 2002) [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.854466
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Abstract:
This data set contains measurements of dissolved phosphorus (total dissolved nitrogen: TDP, dissolved inorganic phosphorus: PO4P and dissolved organic phosphorus: DOP) in samples of soil water collected in 2002 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.
Glass suction plates with a diameter of 12 cm, 1 cm thickness and a pore size of 1–1.6 µm (UMS GmbH, Munich, Germany) were installed in April 2002 in depths of 10, 20, 30 and 60 cm to collect soil solution. Manual soil matric potential measurements were used to regulate the vacuum system. The sampling bottles were continuously evacuated to a negative pressure between 50 and 350 mbar, such that the suction pressure was about 50 mbar above the actual soil water tension. Thus, only the soil leachate was collected. Cumulative soil solution was sampled bi-weekly, in 2002 at the 23.10.2002; 05.11.2002; 20.11.2002; 05.12.2002; and 28.12.2002, and analyzed for dissolved inorganic P (PO4P) and total dissolved phosphorus (TDP).
Inorganic phosphorus concentrations in the soil solution were measured photometrically with a continuous flow analyzer (CFA SAN++, Skalar [Breda, The Netherlands]). Ammonium molybdate catalyzed by antimony tartrate reacts in an acidic medium with phosphate and forms a phospho-molybdic acid complex. Ascorbic acid reduces this complex to an intensely blue-colored complex. Total dissolved P in soil solution was analyzed by irradiation with UV and oxidation with K2S2O8 followed by reaction with ammonium molybdate (Skalar catnr. 503-553w/r). As the molybdic complex forms under strongly acidic conditions, we could not exclude the hydrolysis of labile organic P compounds in our samples. Furthermore, the molybdate reaction is not sensitive for condensed phosphates. The detection limits of both TDP and PO4P were 0.02 mg P l-1 (CFA, Skalar). Dissolved organic P (DOP) in soil solution was calculated as the difference between TDP and PO4P. In a low number of samples, TDP was equal to or smaller than PO4P; in these cases, DOP was assumed to be zero.
Related to:
Oelmann, Yvonne; Kreutziger, Yvonne; Temperton, Vicky; Buchmann, Nina; Roscher, Christiane; Schumacher, Jens; Schulze, Ernst-Detlef; Weisser, Wolfgang W; Wilcke, Wolfgang (2007): Nitrogen and Phosphorus Budgets in Experimental Grasslands of Variable Diversity. Journal of Environmental Quality, 36(2), 396, https://doi.org/10.2134/jeq2006.0217
Oelmann, Yvonne; Richter, Anika K; Roscher, Christiane; Rosenkranz, Stephan; Temperton, Vicky; Weisser, Wolfgang W; Wilcke, Wolfgang (2011): Does plant diversity influence phosphorus cycling in experimental grasslands? Geoderma, 167-168, 178-187, https://doi.org/10.1016/j.geoderma.2011.09.012
Further details:
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: 2002-01-01T00:00:00 * Date/Time End: 2002-12-31T00:00:00
Minimum DEPTH, soil: 0.1 m * Maximum DEPTH, soil: 0.6 m
Event(s):
Comment:
During summer months, soil frequently dries out so that no soil pore water can be collected. Consequently, no data can be provided during such periods.
In 2002, only in block 2 suction plates were installed in all four depth layers. In block 1 and 3, suction plates were installed only in 30 centimeter depth. In 2005, additional suctions plates were installed in 20 centimeter depth in block 1, and 3. In block 4, no samples are available because no plates were installed.
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 case 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".
In addition to measurements of dissolved phosphorus (organic, inorganic, and total) determined from bi-weekly soil solution samples, measurement of dissolved inorganic phosphorus in soil solution aggregated to seasonal values, phosphorus fractions in soil, and total phosphorus from soil samples are available.
This datasets is part of a collection of soil phosphorus measurements in the Main Experiment since 2002 (doi:10.1594/PANGAEA.854466).
Parameter(s):
# | Name | Short Name | Unit | Principal Investigator | 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 | Phosphorus, organic, dissolved | DOP | mg/l | Measured on plot level | ||
21 | Phosphorus, inorganic, dissolved | DIP | mg/l | Measured on plot level | ||
22 | Phosphorus, total dissolved | TDP | mg/l | Measured on plot level |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
29274 data points
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