Root Biomass of Cover Crops — GLBRC Biofuel Cropping System Experiment
Root biomass of cover crops in BCSE annual treatments with cover crop rotations (G2-G4) sampled at the time of cover crop harvest at KBS in 2013. The roots from individual cover crop plants (ex. rye) were excavated and the plant density was used to determine the belowground net primary production (BNPP) of cover crops in grams/meter2.
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 2013|
|year||year of harvest|
|sample date||collection date|
|site||location of biomass collection|
|replicate||replicate nested within treatment|
|bnpp g m2||cover crop root biomass. Sampled as an individual plant and adjusted to area using plant density.||g/m2|
|root weight g||root weight from 1 cover crop plant|
|plant population m2||Number of plants of given species per meter squared.|
|wi plot id||field code used at Arlington Wisconsin Intensive site|
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|2013||2013-06-03||KBS GLBRC Intensive Site||G2||R1||S1||Secale cereale M.Bieb.||0.5838||0.0417||14|
|2013||2013-06-03||KBS GLBRC Intensive Site||G2||R1||S2||Secale cereale M.Bieb.||2.024||0.1265||16|
|2013||2013-06-03||KBS GLBRC Intensive Site||G2||R1||S3||Secale cereale M.Bieb.||2.016||0.096||21|
|2013||2013-06-03||KBS GLBRC Intensive Site||G2||R2||S1||Secale cereale M.Bieb.||1.2255||0.0645||19|
|2013||2013-06-03||KBS GLBRC Intensive Site||G2||R2||S2||Secale cereale M.Bieb.||3.4692||0.1239||28|