Poplar Biomass Areal via Allometry — Main Cropping System Experiment (MCSE)
Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use
Poplars are destructively sampled to estimate biomass. In between the diameter of the poplars is used to estimate the biomass. 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 Populus. nigra x Populs maximowiczii.).
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: | KBS019-009.48 |
| Core Areas | Primary Production,Populations,Disturbance |
| Repository link: | http://doi.org/10.6073/pasta/11813b609a26b343cced93805b25a98b |
| Related Tables: | |
| Personnel: |
|
| Last Updated | 2020-07-10 |
| Variate | Description | Units |
|---|---|---|
| year | year of the growing season relevant for the sample | |
| campaign | a major multi-year research activity with a discreet purpose | |
| date | date on which sampling occured | |
| treatment | main experimental treatment | |
| replicate | replicate block, nested within treatment | |
| tree id | a designation unique to a particular tree | |
| variety | poplar hybird | |
| square meter per tree | how many square meter of ground does one tree occupy | squaremeter |
| biomass g | dry weight of the tree | gram |
| biomass g m2 | dry mass of the tree per square meter | g/m2 |
| flag | indicates whether the biomass was measured 'M' or estimated 'E' with the allometric equations |
Data Excerpt
| year | campaign | date | treatment | replicate | tree_id | variety | square_meter_per_tree | biomass_g | biomass_g_m2 | flag |
|---|---|---|---|---|---|---|---|---|---|---|
| 2019 | Poplar Measurement | 2019-11-21 | T5 | R1 | 6, 38 | Populus nigra x P. maximowiczii. | 3.6 | 6.0 | 2.0 | E |
| 2019 | Poplar Measurement | 2019-11-21 | T5 | R1 | 26, 7 | Populus nigra x P. maximowiczii. | 3.6 | 6.0 | 2.0 | E |
| 2019 | Poplar Measurement | 2019-11-21 | T5 | R1 | 19, 44 | Populus nigra x P. maximowiczii. | 3.6 | 25.0 | 7.0 | E |
| 2019 | Poplar Measurement | 2019-11-21 | T5 | R1 | 21, 4 | Populus nigra x P. maximowiczii. | 3.6 | 16.0 | 4.0 | E |
| 2019 | Poplar Measurement | 2019-11-21 | T5 | R1 | 28, 22 | Populus nigra x P. maximowiczii. | 3.6 | 14.0 | 4.0 | E |