Root Biomass of Annual Crops — GLBRC Biofuel Cropping System Experiment
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.
|Experiment:||GLBRC Biofuel Cropping System Experiment|
|Data available from:||January 2008 to December 2014|
|Core Areas||Primary Production|
|year||year of the growing season|
|sample date||sample date|
|site||location of biomass collection|
|replicate||replicate nested in treatment|
|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|
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|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|