Poplar Biomass per Stem via Allometry

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)
Dataset: KBS094
Datatable ID: KBS019-025.26
Core Areas Primary Production,Populations,Disturbance
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Last Updated 2017-10-24
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
2016 Poplar Measurement 2016-12-08 T5 R1 19, 52 1 169 36341.9168026874 E
2016 Poplar Measurement 2016-12-08 T5 R1 24, 14 1 138 22495.4040180364 E
2016 Poplar Measurement 2016-12-08 T5 R1 33, 18 1 130 19530.0751721475 E
2016 Poplar Measurement 2016-12-08 T5 R1 22, 5 1 160 31926.5505855157 E
2016 Poplar Measurement 2016-12-08 T5 R1 30, 12 1 88 7755.15504691224 E
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