BEF-China | NILEx tracer (wood): wood samples N measurements via mass spectrometry

Show: NILEx tracer (wood): wood samples N measurements via mass spectrometry

Title:

NILEx tracer (wood): wood samples N measurements via mass spectrometry

Access rights:

Private

Usage rights:

Published:

Abstract:

These data were complied related to the question: Is there evidence for lateral N-transport from leaf litter to dead wood? Wood slices of different species (Pinus massonina, Schima superba, Quercus serrata) placed at different divers 15N labeled leaf litter mixture layers (of tree differenzt species: Schima superba, Quercus acutissima, Sapindus mukorossi). Two different decomposition periods were observed. Afterwards the decomposed wood slices were analysed via mass spectrometry regarding to their total N content and their 15N content.

Design:

The 15N transport from leaf litter to dead wood of three different wood species were analysed. It was tested if there were differences in N transport related to decomposition period, wood species, diversity level of leaf mixtures and to the combination of wood species and leaf species.

Spatial extent:

Subtropical China, near site A, Xingangshan, Jiangxi

Temporal extent:

Wood slices were placed at 16./17.04.2012 in the field and were harvested at 16.07.2012 (after 3 months) and 07.10.2012 (after 6 months). The analysis of wood samples via mass spectrometer took place from March to June 2016.

Taxonomic extent:

Wood species: Pinus massoniana, Quercus serrata, Schima superba

Measurement cirumstances:

Are there circumstances that explain the precision of your measurements? Could it be that a sandstorm destroyed part of the plots in a given year?

Data analysis:

Parameters of interest were total N content (%) and 15N content (Δ vs. air) of wood samples. Both were analysed by mass spectrometry (Delta V Advantage, 0.7 mg sample in tin capsules 9x15mm)

Filter:

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Dataset column

Name:

sample-ID

Definition:

sample-ID to identify a respective sample (e.g. for further use of the physical sample in a lab analysis). The first five digits show the laboratory number, the letter show the wood species (Pinus massonina (P), Quercus serrata (Q), Schima superba (S)) and the last digit shows the tree number.

Unit:

No information available

Datagroup:

Identifier

Keywords:

No information available

Values:

00006 P5
00004 P5
00010 P6
00008 P6
00002 P5

Contributors:

No information available

Dataset column

Name:

species

Definition:

species anes according to the Flora of China

Unit:

No information available

Datagroup:

Scientific plant species name

Keywords:

No information available

Values:

Schima superba
Quercus serrata
Pinus massoniana

Contributors:

wood species from which the sample has arisen category

Dataset column

Name:

tree

Definition:

Tree individual of which the sample has arisen (tree number 1-4 for Schima superba, tree number 5-6 for Pinus massoniana and tree number 7-10 for Quercus serrata).

Unit:

No information available

Datagroup:

Helper

Keywords:

No information available

Values:

Ind_2
Ind_3
Ind_4
Ind_10
Ind_1

Contributors:

tree individual of which the sample has originated (tree number 1-10) category

Dataset column

Name:

harvest

Definition:

t0: samples of wood slices which have never been exposed in the field (undecomposed samples) t1: samples which have been collected at the first sampling period (see respective date). t2: samples which have been collected at the first sampling period (see respective date).

Unit:

No information available

Datagroup:

time of decomposition

Keywords:

No information available

Values:

t0
t2
t1

Contributors:

point of time when the sample was taken out of testing field (t0, t1, t2) category

Dataset column

Name:

mesh

Definition:

c:samples of wood slices which were packed into coarse meshed bags (7mm mesh size) f:samples of wood slices which were packed into fine meshed bags (0.25 mm mesh size)

Unit:

No information available

Datagroup:

Treatment

Keywords:

No information available

Values:

c
f

Contributors:

gaze treatment - slices were packed in fine (025mm) or coarse (7mm) meshed gaze (f or c) category

Dataset column

Name:

block-plot

Definition:

Information on the position of the respective sample within the randomized design of the TracerNILEx. First digit indicates Blick, second digit indicates plot within the respective block

Unit:

No information available

Datagroup:

Tracer NILEx Plot

Keywords:

No information available

Values:

1-15
1-14
1-2
1-11
1-20

Contributors:

No information available

Dataset column

Name:

diversity

Definition:

1.0, leaf litter mixture containing one leaf species (monoculture) 2.0, leaf litter mixture containing two leaf species 3.0, leaf litter mixture containing three leaf species

Unit:

No information available

Datagroup:

Tracer NILEx Diversity

Keywords:

No information available

Values: