GLBRC Sustainability Data Catalog

Root Biomass of Annual Crops — 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Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use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 biomass of BCSE annual crops (G1-G4) at physiological maturity as as estimate of belowground net primary production (BNPP). At KBS, the roots of a single plant are collected at each sampling station (S1-S3); at Arlington, all roots within one square meter are collected. These root samples were also analyzed for total carbon and nitrogen; data are at http://data.sustainability.glbrc.org/datatables/449.

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 2014
Dataset: GLBRC089
Datatable ID: GLBRC089-007.79
Core Areas Primary Production
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Last Updated 2023-10-24
Variate Description Units
year year of the growing season
sample date sample date
site location of biomass collection
treatment experimental treatment
replicate replicate nested in treatment
station sampling location
wi plot id Arlington Wisconsin plot code
species crop where roots were collected
root weight dry root weight per core area
bnpp g m2 Below ground root biomass. KBS root biomass is averaged by station. Arlington is given by station. g/m2
plant population m2 plant populations per meter square number/m^2
comments sample notes
campaign sample campaign

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Data Excerpt

year sample_date site treatment replicate station wi_plot_id species root_weight_grams bnpp_g_m2 plant_population_m2 campaign comments
2008 2008-08-25 Arlington GLBRC Intensive Site G4 R3 S2 Brassica napus L. 23.79
2008 2008-08-25 Arlington GLBRC Intensive Site G4 R2 S3 Brassica napus L. 31.39
2008 2008-08-25 Arlington GLBRC Intensive Site G4 R1 S3 Brassica napus L. 31.65
2008 2008-08-25 Arlington GLBRC Intensive Site G4 R2 S1 Brassica napus L. 40.73
2008 2008-08-25 Arlington GLBRC Intensive Site G4 R1 S1 Brassica napus L. 48.95
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