GLBRC Sustainability Data Catalog

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Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use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.


Experiment: GLBRC Biofuel Cropping System Experiment
Data available from: January 2008 to December 2017
Dataset: GLBRC089
Datatable ID: GLBRC089-003.71
Core Areas Primary Production
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Last Updated 2023-05-01
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 centimeter
depth bottom bottom depth of the root core centimeter
biomass g m2 Root biomass given as area. Note that depths vary. g/m2
root weight dry root weight in the core section gram
area sampled area of the core or the pit squarecentimeters
comments data notes
wi plot id plot identifier used only by Arlington Wisconsin site

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Data Excerpt

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
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