Poplar Biomass per Stem via Allometry — Main Cropping System Experiment (MCSE)
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The measured and estimated biomass and poplar diameters per stem. After the first rotation the poplars were allowed to coppice and had several stems per tree. The different stems are indicated by the stem id. The following equations were used to convert diameters at 15 cm to tree weight. 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).
This datatable is part of the Poplar Biomass by Allometric Equations dataset. Poplars are grown as cellulose crop at the Main Cropping System Experiment. The first rotation was planted at a stocking density of 1 tree per 2 square meter. After the first harvest the trees were allowed to coppice. After the second harvest the trees were replanted. The third rotation was planted at 1 tree per 3.6 square meter. For the first two rotations the species planted was Populus nigra x P. deltoids hybrid for the third rotation it is Populus nigra x P. maximowiczii.
Note
| Experiment: | Main Cropping System Experiment (MCSE) |
| Data available from: | January 1989 to January 2019 |
| Dataset: | KBS094 |
| Datatable ID: | KBS019-025.48 |
| Core Areas | Primary Production,Populations,Disturbance |
| Repository link: | http://doi.org/10.6073/pasta/11813b609a26b343cced93805b25a98b |
| Related Tables: | |
| Personnel: |
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| Last Updated | 2020-07-10 |
| 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 | millimeter |
| biomass g | dry mass of the stem | gram |
| flag | a flag to indicate if the mass is estimated using an allometric equation 'E' or measured 'M' |
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 |