SPRUCE Plant-Available Nutrients Assessed with Ion-Exchange Resins in Experimental Plots, Beginning in 2013
Description
These data report observations of plant-available nutrients assessed in ten SPRUCE experimental enclosures and several ambient plots using ion-exchange resin capsules beginning in 2013. Data streams include monthly NH4-N, NO3-N, and PO4 from 2013 (published in Iversen et al. 2018, Plant and Soil), as well as monthly and annual resin-available NH4-N and PO4-P from 2014 – 2018 (published in Iversen et al. 2023).
These data report observations of plant-available nutrients assessed in ten SPRUCE experimental enclosures and several ambient plots using ion-exchange resin capsules beginning in 2013 (2013-06-25 to 2021-12-08). There are three files in comma-separated (*.CSV) format: The first contains monthly resin-available NH4-N, PO4-P, and NO3-N from 2013, which were published in Iversen et al. (2018). The second contains monthly resin-available NH4-N from 2014 - 2021 and PO4-P from 2014 - 2018. It also includes associated peat temperature and distance to water table curated from Hanson et al. (2016 and 2020). These data are published in Iversen et al. (2023) and Petro et al. (2023). The third contains cumulative, annual resin-available NH4-N and PO4-P from 2014 - 2021. These data are published in Iversen et al. (2023) and Petro et al. (2023).
PVC resin-access tubes (allowing repeated, and undisturbed access to the same soil location over time) were installed across hummock and hollow microtopography in the SPRUCE experimental enclosures and ambient plots. Resin capsules were placed into contact with the soil at the base of resin-access tubes and incubated in situ for approximately 28 days before collection and replacement with a new resin capsule. The removed capsules were cleaned, air-dried, and extracted with 2 M potassium chloride. The extractant was analyzed for concentrations of NH4-N, NO3-N, and PO4-P. Nutrient adsorption was standardized per unit of resin capsule surface area and per time interval.
User note: In 2013, data were collected at approximately monthly intervals from four depths in hummock microtopography and two depths in hollow microtopography. In 2014-2018, data include both highly-resolved collections at 28-day timesteps as well as annually summed data at three depths in hummock microtopography and two depths in hollow microtopography. Data will be periodically added to this data set until the conclusion of the SPRUCE experiment.
Citation
Iversen CM, Latimer J, Burnham A, Brice DJ, Childs J, Vander Stel HM, Schwaner GW, Weber SE. 2017. SPRUCE Plant-Available Nutrients Assessed with Ion-Exchange Resins in Experimental Plots, Beginning in 2013. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. http://dx.doi.org/10.3334/CDIAC/spruce.036.
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Posted
Monday, March 6, 2017
SPRUCE ID: spruce.036
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