Peak Biomass — GLBRC Marginal Land 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Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use
Peak plant biomass is measured annually in the fall at each site in the Marginal Land Experiment and serves as an estimate of Annual Net Primary Production (ANPP).
This datatable is part of the Cropping Systems – Marginal Land Experiment dataset. This dataset contains data on the biofuel cropping systems of the GLBRC Marginal Land Experiment (MLE) originally established in 2013 at north, central and south sites in Wisconsin and Michigan. The experiment consists of six different biofuel cropping systems (a.k.a. treatments; G5-G10; including switchgrass, miscanthus, native grasses, hybrid poplar, early successional, and restored prairie) plus an historical vegetation control (G11), replicated in each of 4 blocks (R1-R4) at each site. Split-plot treatments were initiated in 2014-2016 to examine the effect of nitrogen fertilization [plus_n (+N) vs control (0N)] on all cropping systems.
Seasonal deployment of rainfall exclusion (rainout) shelters in the fertilized split plot of the switchgrass (G5) treatment began in 2018 to examine the effects of drought on plant growth. See the Marginal Land Rainfall Exclusion Experiment for these data.
Note that Block 1 at the Wisconsin Central – Hancock site was retired in 2015 and the entire Wisconsin South – Oregon site was retired after 2018 growing season when the maintenance, harvest, sampling and analysis of the remaining Wisconsin sites was transferred from UW staff to MSU staff.
Note
| Experiment: | GLBRC Marginal Land Experiment |
| Data available from: | January 2014 to January 2022 |
| Dataset: | GLBRC126 |
| Datatable ID: | GLBRC126-001.108 |
| Core Areas | Primary Production |
| Repository link: | |
| Related Tables: | |
| Personnel: |
|
| Last Updated | 2023-01-20 |
| Variate | Description | Units |
|---|---|---|
| year | year of sampling date | |
| site | site of marginal land experiment | |
| sample date | ||
| campaign | experimental campaign | |
| treatment | treatment in MLE site | |
| replicate | nested replicates of treatment | |
| field section | field section within replicate | |
| station | ||
| n treatment | nitrogen adding or control | |
| area sampled | sampling area | squaremeter |
| wet weight | wet weight of plant sample | kilogram |
| dry weight | dry weight of plant sample | kilogram |
| biomass | crop biomass | g/m2 |
| moisture | percent moisture | % |
| comment |
Data Excerpt
| year | site | sample_date | campaign | treatment | replicate | field_section | station | n_treatment | area_sampled | wet_weight | dry_weight | biomass | moisture | comment |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | Michigan Central - Lake City Exp. Station | 2021-09-02 | peak biomass | G10 | R1 | north | east | plus_n | 1.0 | 1.203 | 1203.0 | no subsample weights taken; all materials went to oven | ||
| 2020 | Michigan Central - Lake City Exp. Station | 2020-09-01 | peak biomass | G10 | R1 | north | east | plus_n | 1.0 | 1.335 | 0.751413 | 751.413 | 56.285618 | |
| 2019 | Michigan Central - Lake City Exp. Station | 2019-09-24 | peak biomass | G10 | R1 | north | east | plus_n | 1.0 | 2.855 | 1.2667214 | 1266.7214 | 55.631474 | |
| 2018 | Michigan Central - Lake City Exp. Station | 2018-08-28 | peak biomass | G10 | R1 | north | east | plus_n | 1.0 | 0.587 | 0.3022092 | 302.2092 | 48.51632 | |
| 2022 | Michigan Central - Lake City Exp. Station | 2022-08-24 | peak biomass | G10 | R1 | north | east | plus_n | 1.0 | 0.5312 | 531.2 |