Pilot experiment: sapling biomass of 4 tree species in 2009-2010

Usage Rights

This data is Private.

Dataset Abstract

In order to develop species-specific allometric equations , the biomass of four species (species pool 1) used by SP5 were measured in parallel with our 15N labelling campaigns (summer and autum 2009, winter and spring 2010). The allometric equations will be used to link 15N uptake to indivual tree biomass. 20 individuals per species were harvested in each season and dry weight of leaves, aboveground woody parts (stem and twigs) and roots were measured.

Dataset Design

Tree saplings of four species (Castanea henryi, Quercus serrata, Schima suberba and Elaeocarpus decipiens) were harvested in the Pilot Experiment on plots used by SP5. Harvesting was performed at the end of each 15N labelling campaing in four seasons: Summer 2009 (beginning of September), autum 2009 ( mid November), winter 2010 (beginning of March) and spring 2010 (mid May). In every season, 20 indivuals per species were harvested and stem diameter (at about 2 cm), height (uppermost leaf bud) and rooting depth were recorded. Roots, aboveground woody parts (stem and twigs) and leaves were cut, dried to constant mass and weighed. 10 of the 20 tree samplings per species were harvested in the monocultures and the other 10 in the four species mixtures. Sampling was distributed more or less equally among the four blocks of the experiment and plots were selected randomly. Only one indivual per monoculture was selected whereas in mixtures up to four sapling of different species were sampled in one plot. Exceptions from the random sampling have been done when mortality rate in the plot was high or the selected tree sapling was heavily damaged by herbivores or pathogens. In the mixtures, the central plant individuals were already harvested for 15N samples so that for biomass determination only marginal plants were available.
Whereas in monocultures, plants were selected randomly from the centre and the edges. In spring 2010, young leaves (from 2010) and old leaves (from 2009 or older) were collected separately for the evergreen species.

Spatial Extent

Pilot Experiment, Xingangshan, China
29°06'29''N
117°55'28''

Temporal Extent

Four seasons: Summer 2009 (beginning of September), autum 2009 ( mid November), winter 2010 (beginning of March) and spring 2010 (mid May)

Taxonomic Extent

Castanea henryi, Quercus serrata, Schima suberba and Elaeocarpus decipiens

Data Analysis

species-specific allometric equations

Data columns available in the raw data part of this dataset

Block
Block number in the Pilot ExperimentBlock code in the pilot experiment
Data group: Block code in the pilot experiment
Keywords: Pilot experiment, block, location
Values
B2
B4
B3
B1
Div
Diversity level; Taxonomic biodiversity;
Data group: Taxonomic biodiversity
Keywords: biodiversity
Values
Mix Pilot
Mono Pilot
Plot_old
Plot number in the Pilot ExperimentWithin Block community code of the Pilot experiment
Data group: Helper
Keywords: Pilot experiment, location
Values
AA11
AA3
AA1
AA2
AA4
plot_id
The community code combines the block number (numbers with _), plot tree community (as numbers) and the plot allocation to a subgroup (as letters)
Data group: BEF research plot name
Keywords: Pilot experiment, location
Values
pilot1AB03
pilot1AA11
pilot1AB04
pilot1AB11
pilot1AA01
Species
sampled Species; Scientific plant species name;
Data group: Scientific plant species name
Keywords: species, sapling
Values
Elaeocarpus decipiens
Schima superba
Quercus serrata
Castanea henryi
Season
Season in which the harvest was conducted
Data group: Season
Keywords: season, harvest
Values
autumn
winter
spring
summer
Year
Year in which harvest was conducted
Data group: Date time information
Keywords: season, harvest
Values
2010
2009
Season_x_Year
Combined information on season and year
Data group: Season
Keywords: season, harvest
Values
Sum09
Win10
Spr10
Aut09
BM_L
Leaf biomass; Above-ground biomass measurement
Unit: g
Data group: Above and below ground biomass measurement
Keywords: biomass, leaf, biomass allocation
Values
10.1
10.2
10
10.4
10.6
BM_LO
Biomass of old leaves in evergreen species (Schima and Elaeocarpus); Above-ground biomass measurement
Unit: g
Data group: Above and below ground biomass measurement
Keywords: biomass, leaf
Values
10.7
10.9
11.6
11.4
10.6
BM_S
Woody aboveground biomass (stem and twigs)Above-ground biomass measurement
Unit: g
Data group: Above and below ground biomass measurement
Keywords: biomass, twig, stem, biomass allocation
Values
10.08
10.1
10.3
10.2
10
BM_R
Root biomass
Unit: g
Data group: Above and below ground biomass measurement
Keywords: biomass allocation, root, belowground biomass
Values
10.25
10.1
10.6
10.66
10.21
BM_total
Sum of sampled biomass components
Unit: g
Data group: Above and below ground biomass measurement
Keywords: biomass, tree, sapling
Values
105.2
105.25
101.4
104.2
102.9
Dia
stem diameter (at about 2 cm)Basal diameter
Unit: cm
Data group: Basal diameter
Keywords: tree, basal diameter, size
Values
0.5
0.55
0.35
0.4
0.45
Height
Height; Plant height;
Unit: cm
Data group: Plant height
Keywords: height, tree, size
Values
100
105
102
104
103
Root_depth
Rooting Depth
Unit: cm
Data group: Rooting depth
Keywords: rooting depth, root
Values
10
14
13
12
11