Title:
Main Experiment: Soil P fractions (Hedley), soil pH, soil C and N content (Site A, Ext. A, B and E plots)
Access rights:
Private
Usage rights:
Usage rights for SP5e members. Acknoledged are: Thomas Scholten, Steffen Seitz, Zhengshan Song for taking soil samples in the field
Published:
No information available
Abstract:
Soil sampling was carried out on a subset of 100 plots of two overlapping extinction scenarios on Site A (Extinction scenario A and B). The samples were collected from young forest communities composed of 1 - 24 species (see general plot information concerning community compositions of the BEF-China experiment: http://china.befdata.biow.uni-leipzig.de/datasets/71; Species nomenclature following the Flora of China). The species composition covers two overlapping species pools and also includes two commercially relevant tree species monocultures (Extinction scenario E, Pinus massoniana and Cunninghamia lanceolata). Moreover, we also sampled plots without trees.
Sampling was carried out in October 2014 by SP6 (Ext. A) and July 2015 by SP5 (Ext. B and E) .
Design:
Within the plots, we collected soil samples from 12 random positions which followed a frame around the central 8 x 8 trees of every plot. Soil cores with a diameter of 13 mm were taken from the first ten centimeters of the top layer. These subsamples were pooled plotwise, freshly sieved in 2 mm fraction, homogenized and stored in the fridge for analyses.
Spatial extent:
Plots of Exctinction scenario A and B (http://china.befdata.biow.uni-leipzig.de/datasets/71). 100 plots were sampled, including non-tree community plots and monocultures of Pinus massoniana and Cunninghammi lanceolata (Extinction Scenario E).
Temporal extent:
Sampling was carried out throughout July 2015.
Taxonomic extent:
No tree species were included in the analyses. However, soil cores were taken from communities comprising the following species (and their mixtures according to (http://china.befdata.biow.uni-leipzig.de/datasets/71):
Nyssa sinensis
Castanea henryi
Quercus fabri
Lithocarpus glaber
Quercus serrata
Koelreuteria bipinnata
Choerospondias axillaris
Castanopsis sclerophylla
Triadica sebifera
Liquidambar formosana
Sapindus saponaria
Schima superba
Castanopsis eyrei
Cyclobalanopsis myrsinifolia
Rhus chinensis
Cyclobalanopsis glauca
Castanopsis carlesii
Melia azedarach
Triadica cochinchinensis
Diospyros japonica
Acer davidii
Cinnamomum camphora
Daphniphyllum oldhamii
Quercus acutissima
Pinus massoniana
Cunninghamia lanceolata
Measurement cirumstances:
hot and wet
Data analysis:
Phosphorus fractions in soils were analyzed by the sequential extraction method according to Hedley (Hedley et al. 1982a). The whole fractionation process used for this data is described in detail by Tiessen and Moir (2008).
Filter:
Dataset column
Name:
Plot
Definition:
Plot within the experimental site
Unit:
No information available
Datagroup:
Plot name Main experiment
Keywords:
No information available
Values:
| E22 |
| C32 |
| E23 |
| E24 |
| BC36 |
Contributors:
No information available
Dataset column
Name:
site
Definition:
site
Unit:
No information available
Datagroup:
Site Main Experiment
Keywords:
No information available
Values:
| A |
Contributors:
No information available
Dataset column
Name:
increment
Definition:
increment
Unit:
No information available
Datagroup:
Soil depth
Keywords:
No information available
Values:
Sample values are not displayed because this column hasn't been approved yet.
Contributors:
No information available
Dataset column
Name:
pi_resin
Definition:
Inorganic P extracted with Resin bags in 20ml H20 for 16hrs, measured in 0.5M HCL
Unit:
µg/g
Datagroup:
Phosphorous
Keywords:
No information available
Values:
| 10.806 |
| 10.545 |
| 10.464 |
| 10.83 |
| 10.442 |
Contributors:
Barbara Weisbrod
Dataset column
Name:
pi_nahco3
Definition:
Inorganic P measured in Extract which was shaken in 25ml NaHCO3 for 16hrs
Unit:
µg/g
Datagroup:
Phosphorous
Keywords:
No information available
Values:
| 1.458 |
| 1.498 |
| 1.476 |
| 1.017 |
| 0.832 |
Contributors:
Barbara Weisbrod
Dataset column
Name:
po_nahco3
Definition:
Organic P measured in Extract which was shaken in 25ml NaHCO3 for 16hrs
Unit:
µg/g
Datagroup:
Phosphorous
Keywords:
No information available
Values:
| 10.165 |
| 12.26 |
| 13.111 |
| 12.291 |
| 12.101 |
Contributors:
Barbara Weisbrod
Dataset column
Name:
pi_naoh
Definition:
Inorganic P measured in Extract which was shaken in 25ml NaOH for 16hrs
Unit:
µg/g
Datagroup:
Phosphorous
Keywords:
No information available
Values:
| 10.575 |
| 10.411 |
| 11.557 |
| 12.442 |
| 12.038 |
Contributors:
Barbara Weisbrod
Dataset column
Name:
po_naoh
Definition:
Organic P measured in Extract which was shaken in 25ml NaOH for 16hrs
Unit:
µg/g
Datagroup:
Phosphorous
Keywords:
No information available
Values:
| 107.611 |
| 109.401 |
| 106.754 |
| 106.901 |
| 101.096 |
Contributors:
Barbara Weisbrod
Dataset column
Name:
pi_1mhcl
Definition:
Inorganic P extracted with 20ml 1m HCL for 16hrs
Unit:
µg/g
Datagroup:
Phosphorous
Keywords:
No information available
Values:
| 0.117 |
| 0.124 |
| 0.142 |
| 0 |
| 0.063 |
Contributors:
Barbara Weisbrod
Dataset column
Name:
pi_hcl_conc
Definition:
Inorganic P measured in Extract which was cooked with 10ml concentrated HCL at 85°C for 20min, after that added an extra 5ml concentrated HCL
Unit:
µg/g
Datagroup:
Phosphorous
Keywords:
No information available
Values:
| 109.465 |
| 128.516 |
| 127.84 |
| 131.496 |
| 107.089 |
Contributors:
Barbara Weisbrod
Dataset column
Name:
tp_residual
Definition:
Total residual P extracted with HNO3-Pressure-Extraction method
Unit:
µg/g
Datagroup:
Phosphorous
Keywords:
No information available
Values:
| 117.337 |
| 109.635 |
| 106.138 |
| 105.922 |
| 114.368 |
Contributors:
Barbara Weisbrod
Dataset column
Name:
tp_initial
Definition:
Total P after digestion with concentrated nitric acid; 400 mg +3 ml HNO3, 8h 190°C under pressure
Unit:
µg/g
Datagroup:
Phosphorous
Keywords:
No information available
Values:
| 253.862 |
| 224.385 |
| 198.943 |
| 274.396 |
| 201.846 |
Contributors:
Barbara Weisbrod
Dataset column
Name:
pH_H2O
Definition:
pH value, measured in water.; Datagroup description: pH value
Unit:
No information available
Datagroup:
pH value
Keywords:
No information available
Values:
| 4.03 |
| 3.97 |
| 4.09 |
| 4.15 |
| 4.13 |
Contributors:
No information available
Dataset column
Name:
ph_CaCl
Definition:
pH value, measured in 0.01 M CaCl2; Datagroup description: pH value
Unit:
No information available
Datagroup:
pH value
Keywords:
No information available
Values:
| 3.73 |
| 3.69 |
| 3.64 |
| 3.7 |
| 3.74 |
Contributors:
No information available
Dataset column
Name:
N
Definition:
Nitrogen concentration of the soil sample.; Datagroup description: Nitrogen
Unit:
perCent
Datagroup:
Nitrogen
Keywords:
No information available
Values:
| 0.155 |
| 0.151 |
| 0.142 |
| 0.148 |
| 0.158 |
Contributors:
No information available
Dataset column
Name:
C
Definition:
Carbon concentration of the soil sample.; Datagroup description: Carbon
Unit:
perCent
Datagroup:
Carbon
Keywords:
No information available
Values:
| 2.097 |
| 1.973 |
| 1.887 |
| 2.074 |
| 1.575 |
Contributors:
No information available
Dataset column
Name:
C_N
Definition:
ratio organic carbon/organic nitrogen
Unit:
ratio
Datagroup:
Carbon Nitrogen ratio
Keywords:
No information available
Values:
| 10.951 |
| 10.892 |
| 10.642 |
| 10.841 |
| 10.793 |
Contributors:
No information available
No information available
No information available
No information avialable
Filter:
No information available
Filter:
No information available
No information available
No information available
No information available
No information available
Download history
Schuldt
2019-01-25 13:53
Bauhus
2018-09-18 07:17
Bauhus
2018-09-18 07:17
Liu
2018-04-01 09:52
Liu
2017-04-18 04:44