Root Biomass of Perennial Crops by Depth — GLBRC Biofuel Cropping System Experiment
Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use
Root (live plus dead) biomass of BCSE perennial treatments (G5-G10) sampled at the end of the growing season by deep cores (1 meter) taken along a gradient from center of the dominant plant species, adjacent to plant, to interstitial between plants and sectioned into four depth intervals or by excavation of a 1 meter deep pit removed at two depth intervals. Note that root biomass of deep cores is not scaled to plant density and should not be used as a direct measure of standing root biomass.
This datatable is part of the Roots of the Biofuel Cropping System Experiment dataset.
Different sampling methods are used to measure root production in the diverse cropping systems of the GLBRC Biofuel Cropping System Experiment (BCSE). For annual crop treatments (G1-G4), root biomass is sampled by excavating a single plant (KBS) or a known soil area (Arlington). For perennial crop treatments (G5-G10), root biomass is sampled from ~1 m deep cores and fine root production is estimated from ingrowth cores buried at the beginning of the growing season. In general, root sampling occurs around three sampling stations (S1-S3) in each replicate block (R1-R5) and at peak biomass, which means physiological maturity for annuals and pre-senescence for perennials. Roots may be analyzed for total carbon and nitrogen content.
Note
| Experiment: | GLBRC Biofuel Cropping System Experiment |
| Data available from: | January 2008 to December 2017 |
| Dataset: | GLBRC089 |
| Datatable ID: | GLBRC089-003.79 |
| Core Areas | Primary Production |
| Repository link: | |
| Related Tables: |
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| Personnel: |
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| Last Updated | 2023-10-24 |
| Variate | Description | Units |
|---|---|---|
| year | year of the growing season | |
| sample date | date the roots were collected | |
| site | experiment location | |
| treatment | experimental treatment | |
| replicate | replicate nested within treatment | |
| transect position | location along plant density gradients moving out from the center of a bunchgrass into the interstitial space | |
| species | dominant plant species at center | |
| depth top | top depth of the root core | |
| depth bottom | bottom depth of the root core | |
| biomass g m2 | Root biomass given as area. Note that depths vary. | g/m2 |
| root weight | dry root weight in the core section | |
| area sampled | area of the core or the pit | |
| comments | data notes | |
| wi plot id | plot identifier used only by Arlington Wisconsin site |
| Protocols |
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| Below Ground Net Primary Production- GLBRC Intensive Sites |
| Belowground Net Primary Production – Biofuel Cropping System Experiment |
GLBRC data is not yet publicly available.
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| year | sample_date | site | treatment | replicate | transect_position | species | depth_top | depth_bottom | biomass_g_m2 | root_weight_g | area_sampled_cm2 | comments | wi_plot_id |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2009.0 | 2009-12-02 | Arlington GLBRC Intensive Site | G9 | R5 | adjacent to plant | Polygonum pensylvanicum L. | 25.0 | 50.0 | 26.2 | 22.9 | 511 | ||
| 2013.0 | 2013-11-18 | Arlington GLBRC Intensive Site | G10 | R5 | adjacent to plant | Panicum virgatum L. | 0.0 | 10.0 | 643.21 | 22.9 | 503 | ||
| 2009.0 | 2009-12-02 | Arlington GLBRC Intensive Site | G7 | R3 | interstitial space | Elymus canadensis | 10.0 | 25.0 | 78.6 | 22.9 | 308 | ||
| 2009.0 | 2009-11-12 | KBS GLBRC Intensive Site | G10 | R1 | adjacent to plant | Elymus canadensis | 50.0 | 100.0 | 10.22 | 0.0289 | 28.27 | ||
| 2010.0 | 2010-11-12 | Arlington GLBRC Intensive Site | G9 | R5 | interstitial space | Lactuca serriola L. | 0.0 | 10.0 | 177.89 | 22.9 | 511 |