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FOR891_sp12e phosporus
Name:
SP12e The effect of tree species diversity on phosphorus availability and cycling
Description:
The maintenance of soil fertility through species diverse forests might be an important ecosystem service in tropical regions with their large areas of forest plantations. Preliminary investigations at the Comparative Study Plots of BEF China have shown, that soil P concentrations are very low, a large proportion of available P is in organic from, and that many of the species show of leaf and litter P concentrations that are indicative P limitation. However, the high variation of P tissue concentrations points to a variety of species-specific mechanisms to adopt to limited P supply. Given the large range of biologically available soil P compounds, and the variety of mechanisms by which plants can access P, we assume that co-existing plant species partition soil organic P to reduce competition. Based on this we hypothesize that (a) the proportion of soil P in available fractions increases with increasing tree species diversity of plots, (b) neighbourhood tree species diversity affects soil P fractions and nutrition of individual trees, and (c) effects of tree species diversity on productivity decline (complementarity reduction) with decreasing diversity of soil organic P sources. In addition, we will explore whether the different soil P fractions can be distinguished on the basis of their spectral properties, which would greatly reduce analytical efforts.
Created at:
2011-04-01
Updated at:
2019-12-17

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5 scherer lorenzen medium

Michael
Scherer-Lorenzen

Roles:
2nd Principle investigator

Owner of:
39 Datasets

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3 Projects

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13 bauhus medium

Jürgen
Bauhus

Roles:
Principle investigator

Owner of:
11 Datasets

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5 Projects

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80 todt medium

Björn
Flockau (ehem. Todt)

Roles:
Former PhD student

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8 Datasets

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1 Projects

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Avatar missing medium

Daniel
Schweizer

Roles:
Former Student

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2 Datasets

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1 Projects

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CSPs: P concentrations in leaves and roots

Abstract:
Phosphorous concentrations in leaves and roots.

Id: 313
Users: 2
Projects: 1
Datafiles: 0
Attachments: 0
Created at: 2013-02-21
Updated at: 2016-03-03

CSPs: Phosphorus fractions of soils: depth increments of 27 Comparative Study Plots

Abstract:
Soil chemical laboratory analyses of all 27 comparative study plots. Anaylsis done with the Hedley fractionation method (Modification by Tiessen & Moir, 1993) for the top three (0-5, 5-10, 10-20cm) of the six depth increments of each CSP

Id: 315
Users: 2
Projects: 1
Datafiles: 1
Attachments: 0
Created at: 2013-02-21
Updated at: 2016-03-03

CSPs: Soil phosphorus neighborhood effects - location of observed tree groups CSP 13, 14, 27

Abstract:
Geospatial coordinates of the tree groups.

Id: 223
Users: 3
Projects: 1
Datafiles: 0
Attachments: 0
Created at: 2012-07-02
Updated at: 2016-03-03

CSPs: Soil phosphorus neighbourhood effects: P concentration in leaves and litter in CSP 13, 14, 27

Abstract:
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Id: 316
Users: 2
Projects: 1
Datafiles: 0
Attachments: 0
Created at: 2013-02-21
Updated at: 2016-03-03

CSPs: Soil phosphorus neighbourhood effects: soil P fraction, pH, C/N in CSP 13, 14, 27

Abstract:
Soil phosphorous and pH in three-tree groups in the Comparative Study sites. 29°08'-29°17'N 118°02'-118°11'E

Id: 222
Users: 3
Projects: 1
Datafiles: 3
Attachments: 0
Created at: 2012-07-02
Updated at: 2016-03-03

Main Experiment: Carbon, Nitrogen, Phosphorus in leaves (Site A)

Abstract:
Leaves of eight species (see 'taxonomic extent') were sampled from 71 plots on site A of the BEF China Main Experiment at Xingangshan, Dexing County, PR of China. Per plot 1 to 16 individuals were sampled and samples were analyzed for P, C and N ...

Id: 560
Users: 2
Projects: 1
Datafiles: 2
Attachments: 0
Created at: 2017-01-09
Updated at: 2017-01-10

Main Experiment: Phosphorus fractions of soils (Site A)

Abstract:
Soil chemical laboratory analyses of 30 plots of site A of experimental study plots at Xingangshan. Samples were taken and provided from Thomas Scholten and Peter Kühn (Tübingen University). Analysis was done at Freiburg University with the Hedley...

Id: 561
Users: 2
Projects: 1
Datafiles: 2
Attachments: 0
Created at: 2017-01-09
Updated at: 2017-01-10
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