Oelmann, Yvonne; Wilcke, Wolfgang (2015): Seasonally aggregated values of dissolved inorganic phosphorus in soil solution of the Jena Experiment (Main Experiment, year 2004) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.854463, 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 inorganic phosphorus in samples of soil solution collected in 2004 from the main experiment plots of a large grassland biodiversity experiment (the Jena Experiment; see further details below) that have been aggregated to seasonal values. 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. 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 biweekly and analyzed for dissolved inorganic P (PO4P). Here volume-weighted mean values are provided as aggregated seasonal values (spring = March to May, summer = June to August, fall = September to November, winter = December to February) for 2004 in spring, fall, and winter. To calculate these values, the sampled volume of soil solution is used as weight for P concentrations of the respective sampling date.
Inorganic phosphorus concentrations in the soil solution were measured photometrically with a continuous flow analyzer (for samples collected until spring 2004: CFA SAN++, Skalar [Breda, The Netherlands]; for samples collected later: CFA Autoanalyzer [Bran&Luebbe, Norderstedt, Germany]). 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. 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) and 0.04 mg P l-1 (Autoanalyzer, Bran&Luebbe).
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: 2004-01-01T00:00:00 * Date/Time End: 2004-12-31T00:00:00
Minimum DEPTH, soil: 0.1 m * Maximum DEPTH, soil: 0.3 m
Event(s):
Comment:
During summer month soil frequently dries out so that no soil pore water can be collected. Consequently, in these periods the volume-weighted mean values are calculated without these data.
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.
In addition to measurement of dissolved inorganic phosphorus in soil aggregated to seasonal values, measurements of dissolved phosphorus (organic, inorganic, and total) determined from bi-weekly soil solution samples and phosphorus fractions in soil determined as well as 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, inorganic, dissolved | DIP | mg/l | Measured on plot level |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
68580 data points
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