Leaf Area Index (LAI) — GLBRC Biofuel Cropping System 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Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use
Leaf Area Index data from the KBS GLBRC Intensive Site (BCSE) was collected from 2009 to 2017. From 2009 to 2013 the data were collected with a Licor LAI-2000 instrument. Since 2013 the data have been collected with an LP-80 Ceptometer.
This datatable is part of the KBS GLBRC Annual Net Primary Productivity dataset. This dataset contains the aboveground annual net primary production (ANPP) data on the KBS Great Lakes Bioenergy Research Center (GLBRC) intensive sites and GLBRC scale-up fields. This dataset contains the aboveground annual net primary production (ANPP) data. ANPP is measured at peak biomass for a given treatment. Additional ANPP measurements are made where appropriate such as occasional destructive harvests for poplar. See the ANPP protocols for descriptions of the sampling and measurement methods for each of the treatments. Below ground net primary production (BNPP) are available for these same sites.
Note
Experiment: | GLBRC Biofuel Cropping System Experiment |
Data available from: | June 2009 to October 2017 |
Dataset: | KBS063 |
Datatable ID: | kbs063-008.86 |
Core Areas | Primary Production,Disturbance |
Repository link: | |
Related Tables: |
|
Personnel: |
|
Last Updated | 2022-06-06 |
Variate | Description | Units |
---|---|---|
sample date | measurement date | |
local time | the local time in the eastern time zone. includes eastern standard time and daylight saving time depending on the date. | |
treatment | experimental treatment | |
replicate | replicate nested within treatment | |
direction | plant direction and number | |
lai | leaf area index | m^2/m^2 |
sel | standard error of lai | m^2/m^2 |
difn | fraction of sky visible | number |
mta | mean tilt angle | degree |
sem | standard error of MTA | degree |
smp | number of sample pairs used | number |
comments | notes on data row | |
instrument | The instrument used ot measure the LAI | |
mean above par | mean PAR above the canopy (in micromoles/(m^2 s)?) | |
mean below par | Mean PAR below the canopy (in micromoles/(m^2 s)?) | |
tau | ratio of below-canopy PAR measurements | dimensionless |
chi | (leaf distribution parameter) ratio of the projected area of an average canopy element (a leaf, for example) on a horizontal plane to its projection on a vertical plane; the default value for χ is 1.0, which assumes the canopy angle distribution to be spherical | dimensionless |
fb | (fractional beam radiation): ratio of direct beam radiation coming from the sun to radiation gathered from all ambient sources, like the atmosphere, or reflected from other surfaces. | |
zenith angle | angle between the point in the sky directly overhead vertical, called the zenith (0°), and the position of the sun. | degree |
Protocols |
---|
LAI 2000 Plant Canopy Analyzer |
GLBRC data is not yet publicly available.
Sign in to request the dataData Excerpt
sample_date | local_time | treatment | replicate | direction | lai | sel | difn | mta | sem | smp | comments | instrument | mean_above_par | mean_below_par | tau | chi | fb | zenith_angle |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2017-10-27 12:52:00 +0000 | 2017-10-27 08:52:00 UTC | G8 | R1 | EP3 | 0.39 | LAI AccuPAR LP-80 Ceptometer | 11.2 | 8.1 | 0.719 | 1.0 | 0.02 | 83.0 | ||||||
2017-10-27 12:51:00 +0000 | 2017-10-27 08:51:00 UTC | G8 | R1 | EP1 | 0.67 | LAI AccuPAR LP-80 Ceptometer | 10.9 | 6.1 | 0.56 | 1.0 | 0.02 | 83.0 | ||||||
2017-10-27 12:51:00 +0000 | 2017-10-27 08:51:00 UTC | G8 | R1 | EP2 | 0.72 | LAI AccuPAR LP-80 Ceptometer | 11.0 | 6.0 | 0.542 | 1.0 | 0.02 | 83.0 | ||||||
2017-10-27 12:50:00 +0000 | 2017-10-27 08:50:00 UTC | G8 | R1 | WP3 | 0.79 | LAI AccuPAR LP-80 Ceptometer | 11.3 | 5.7 | 0.505 | 1.0 | 0.02 | 83.0 | ||||||
2017-10-27 12:48:00 +0000 | 2017-10-27 08:48:00 UTC | G8 | R1 | WP2 | 0.79 | LAI AccuPAR LP-80 Ceptometer | 12.1 | 6.2 | 0.51 | 1.0 | 0.02 | 84.0 |