Poplar Stem Biomass (Direct Measurement and Allometry) — Main Cropping System Experiment (MCSE)
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Poplar (T5) biomass based on direct measurements (M) from destructive tree sampling and biomass estimates (E) via allometry using measurements of stem (trunk) diameter (at 15 cm above ground) and the following equations: biomass_g = 10^ (-1.195 + 2.505 * log(diameter)) (before 2008 for the Populus nigra x P. deltoids hybrid) and biomass_g = 10^(-0.713 _ 2.367 * log(diameter)) (after 2008 for the Populus. nigra x Populs maximowiczii variety). Direct biomass measurements are reported on an individual stem (main vertical axes) basis for each tree destructively sampled. Note that coppiced regrowth has multiple stems per destructively sampled tree.
This datatable is part of the Primary Production of the Poplar Treatment of the Main Cropping System Experiment dataset.
This dataset contains allometric and areal biomass data for the Poplar treatment (T5) of the Main Cropping System Experiment (MCSE) at the LTER Main Site. The Poplar treatment is managed as a short-rotation woody biomass system on an approximate 10-year rotation cycle with replanting or coppicing after harvest. Rotations are as follows:
- First: planted in April 1989 with stem cuttings of Populus nigra x P. deltoids hybrid at a stocking density of 1 tree per 2 square meter, harvested in February 1999.
- Second: trees allowed to coppice after 1999 harvest, coppicing produced multiple stems per tree, coppiced regrowth harvested in January 2008.
- Third: planted in May 2009, after a fallow year, with stem cuttings of Populus nigra x P. maximowiczii at a density of 1 tree per 3.6 square meter, harvested in February 2018.
- Fourth: planted in June 2019, after a fallow year, with stem cuttings of Populus nigra x P. maximowiczii at a density of 1 tree per 3.6 square meter.
For further information on poplar management, search the KBS Aglog.
Note
| Experiment: | Main Cropping System Experiment (MCSE) |
| Data available from: | January 1989 to January 2019 |
| Dataset: | KBS094 |
| Datatable ID: | KBS019-025.86 |
| Core Areas | Primary Production,Populations,Disturbance |
| Repository link: | http://doi.org/10.6073/pasta/11813b609a26b343cced93805b25a98b |
| Related Tables: | |
| Personnel: |
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| Last Updated | 2024-03-18 |
| Variate | Description | Units |
|---|---|---|
| year | sample year | |
| campaign | sampling campaign | |
| date | sample date | |
| treatment | treatment that was sampled | |
| replicate | replicate plot that was sampled | |
| tree id | id of the tree sampled | |
| stem id | id of the stem sampled | |
| diameter | diameter of the stem | mm |
| biomass g | dry mass of the stem | |
| flag | a flag to indicate if the mass is estimated using an allometric equation 'E' or measured 'M' |
| Protocols |
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Data Excerpt
| year | campaign | date | treatment | replicate | tree_id | stem_id | diameter | biomass_g | flag |
|---|---|---|---|---|---|---|---|---|---|
| 2019 | Poplar Measurement | 2019-11-21 | T5 | R1 | 32, 38 | 1 | 9.75 | 42.45940709432278 | E |
| 2019 | Poplar Measurement | 2019-11-21 | T5 | R1 | 17, 25 | 1 | 7.38 | 21.96288605533211 | E |
| 2019 | Poplar Measurement | 2019-11-21 | T5 | R1 | 28, 22 | 1 | 6.19 | 14.485442489969312 | E |
| 2019 | Poplar Measurement | 2019-11-21 | T5 | R1 | 19, 44 | 1 | 7.74 | 24.583847540833307 | E |
| 2019 | Poplar Measurement | 2019-11-21 | T5 | R1 | 21, 43 | 1 | 6.57 | 16.679277326031194 | E |