RFC: Rubber Flux Chachoengsao
General site details
| Site name | Rubber Flux Chachoengsao |
|---|---|
| AsiaFlux site code | RFC |
| Location | Chachoengsao Rubber Research Center (CRRC, Department Of Agriculture), Sanam Chaiket., Thailand |
| Position | 13°39' 56"N , 101°26' 29"E |
| Elevation | 69 m |
| Slope | Negligeable |
| Terrain type | Flat |
| Area | 6 ha plot in a 200 ha plantation |
| Fetch | - |
| Climate | Tropical monsoon climate |
| Mean annual air temperature | 28ºC |
| Mean annual precipitation | 1276 mm |
| Vegetation type | Mono-specific rubber tree (Hevea brasiliensis) plantation |
| Dominant Species (Overstory) | Hevea brasiliensis |
| Dominant Species (Understory) | Scarce shrubs and remains of previous intercrop (rattan, bamboo...) |
| Canopy height | 20 m |
| Age | 13 years old in 2009 |
| LAI | 3.2 |
| Soil type | Sandy-clay-loam (Kabin Buri series) characterized by a compact lateritic layer with ferralitic concretions at ca 1 m deep |
Observation
Eddy Covariance method (CO2)
| System | Open-path system (LI-7500, LI-COR) |
|---|---|
| Wind speed | Three-dimensional sonic anemometer-thermometer (Young 8100V) |
| Air temperature | Three-dimensional sonic anemometer-thermometer (Young 8100V) |
| Water vapor | Open-path CO2/H2O analyzer (LI-7500, LI-COR) |
| CO2 | Open-path CO2/H2O analyzer (LI-7500, LI-COR) |
| Measurement height | 27 m |
| Sampling frequency | 10 Hz |
| Averaging time | 30 min |
| Data logger | PC |
| Data storage | PC |
| Original data | Raw data |
Meteorology
| Observation items | Levels/Depth | Instrument |
|---|---|---|
| Global solar radiation(incoming) | 26.5 m | Huksflux pyranometer LP02 |
| Global solar radiation (outgoing | - | |
| Long-wave radiation(outgoing) | - | |
| Long-wave radiation(outgoing) | - | |
| Net radiation | 26 m | Non-ventilated NR-Lite radiometer |
| PPFD (incoming) | - | Delta T BF3 (total, direct, diffuse) |
| Air temperature | - | Campbell 10CRT, non-ventilated thermocouples (hand made) |
| Humidity | - | Vaisala HMP35 |
| Soil temperature | -0.2 to -1.0 m | Thermocouple |
| Soil heat flux | - | |
| Soil water content | 0 to -1.2 m | TDR probes |
| Wind speed | 27 m | R.M. Young 05103 |
| Wind direction | 27 m | R.M. Young 05103 |
| Barometric pressure | - | |
| Precipitation | 26.5 m | Campbell ARG 100 |
| CO2 concentration | - | Li 7500, Li-Cor Inc., Lincoln, NE, USA |
| H2O concentration | - | Li 7500, Li-Cor Inc., Lincoln, NE, USA |
Other
| Soil respiration | Continuous (not operating yet) |
| Photosynthesis | Jarvis-Farquhar modeling under development, canopy modeling |
| Ecological investigation | Tree height, diameter, root growth and turnover, phenology, LAI and canopy structure, litter dynamics, sap flow velocity, water potential in tree and soil, soil water content |
Observation Period and Data Availability
| Measurement Period | from October 2006 to present |
|---|---|
| Measurement Frequency | Continuous |
| Data Availability | N/A |
Contact
Frederic Gay (frederic.gay [at] cirad.fr) Cirad Office, Hevea research Platform, Kasetsart University, 10900 Bangkok, Thailand
Poonpipope Kasemsap (agrppk [at] ku.ac.th) Department of Horticulture, Faculty of Agriculture, Kasetsart University, 10900 Bangkok, Thailand
Other [General] Olivier Roupsard, Cirad, France (olivier.roupsard [at] cirad.fr) [Flux and micrometeorology] Jean-Marc Bonnefond, INRA, Bordeaux, France (bonnefon [at] bordeaux.inra.fr) [Water and soil] Kumut Sangkhasila, Kasetsart University, Bangkok, Thailand (agrkms [at] ku.ac.th) [Ecophysiology] Philippe Thaler, Cirad, France (philippe.thaler [at] cirad.fr) [Ecophysiology] Arak Chantuma RRIT, Thailand (arakchantuma [at] yahoo.com)
Infrastructure
Tower, 25 m, climbable. Electrical power : AC Facilities for communication : telephone at an adjoining laboratory Accommodation : possible at CRRC
Research Fund
Cirad Kasetsart University Franco-Thai Cooperation Program in Higher Education and Research Year 2005, ‘Improving Rubber Tree Productivity’ project.