Root Biomass in Deep Cores — Switchgrass Nitrogen Rate 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Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use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 in deep cores (0-1 m) collected from the Switchgrass Nitrogen Rate Experiment in 2013 for Leilei Ruan. Cores were taken from each treatment plot and sectioned into 0-10, 10-25, 25-50, and 50-100 depth intervals.
This datatable is part of the Switchgrass Nitrogen Rate Experiment dataset.
This dataset contains data from the Switchgrass Nitrogen Rate Experiment (formerly Nitrogen/Harvest) at the KBS GLBRC Intensive Field Site. Switchgrass is grown under 8 rates of nitrogen fertilization (F1-F8; 0-196 kg N/ha) with each treatment plot replicated in four blocks (R1-R4). From 2010–2012, the experiment also included split plots with two harvest strategies (H1, H2; 1 vs 2 harvests/yr) for each nitrogen treatment; from 2013 onward all split plots are harvested only once in the fall, with yields measured separately 2013-2022 and combined starting in 2023.
Note
| Experiment: | Switchgrass Nitrogen Rate Experiment |
| Data available from: | May 2013 |
| Dataset: | GLBRC132 |
| Datatable ID: | GLBRC130-005.126 |
| Core Areas | Primary Production |
| Repository link: | |
| Related Tables: |
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| Personnel: |
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| Last Updated | 2023-10-24 |
| Variate | Description | Units |
|---|---|---|
| sample date | the sample date | |
| site | ||
| experiment | the experiment | |
| treatment | treatment of switchgrass nitrogen application | |
| plot | switchgrass experimental plot | |
| species | crop species | |
| harvest scheme | switchgrass harvest scheme (H1: one harvest per growing season; H2: two harvests per growing season) | |
| depth top cm | top sampling depth | |
| bottom depth cm | bottom sampling depth | |
| root weight | root weight in the sample | |
| core area | area of sampling core | |
| campaign | sampling campaign | |
| actual top depth cm | ||
| actual bottom depth cm |
| Protocols |
|---|
| Belowground Net Primary Production – Biofuel Cropping System Experiment |
| GLBRC Switchgrass Nitrogen Rate Experiment – Sampling |
GLBRC data is not yet publicly available.
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| sample_date | site | experiment | treatment | plot_id | species | harvest_scheme | top_depth_cm | bottom_depth_cm | raw_weight_g | core_area | campaign | actual_top_depth_cm | actual_bottom_depth_cm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2013-05-14 | KBS GLBRC Intensive Site | Switchgrass Nitrogen Rate Experiment | SWF6 | 403 | Panicum virgatum L. | H1 | 10.0 | 25.0 | 1.8 | 45.36 | deep core sampling | 10 | 25 |
| 2013-05-14 | KBS GLBRC Intensive Site | Switchgrass Nitrogen Rate Experiment | SWF3 | 406 | Panicum virgatum L. | H1 | 25.0 | 50.0 | 1.16 | 45.36 | deep core sampling | 25 | 50 |
| 2013-05-14 | KBS GLBRC Intensive Site | Switchgrass Nitrogen Rate Experiment | SWF3 | 406 | Panicum virgatum L. | H1 | 50.0 | 100.0 | 3.08 | 45.36 | deep core sampling | 50 | 95 |
| 2013-05-14 | KBS GLBRC Intensive Site | Switchgrass Nitrogen Rate Experiment | SWF2 | 407 | Panicum virgatum L. | H1 | 0.0 | 10.0 | 1.52 | 45.36 | deep core sampling | 0 | 10 |
| 2013-05-14 | KBS GLBRC Intensive Site | Switchgrass Nitrogen Rate Experiment | SWF2 | 407 | Panicum virgatum L. | H1 | 10.0 | 25.0 | 1.67 | 45.36 | deep core sampling | 10 | 25 |