RFB: Rubber Flux Bueng Kan
General site details
| Site name | Rubber Flux Bueng Kan |
|---|---|
| AsiaFlux site code | RFB |
| Location | Pak Khat district, BuengKan province, Thailand |
| Position | 18°13'22.77"N , 103°18'59.46"E |
| Elevation | 186 m |
| Slope | 1-3 degree |
| Terrain type | Flat |
| Area | 16 ha |
| Fetch | - |
| Climate | Tropical monsoon climate |
| Mean annual air temperature | 27ºC |
| Mean annual precipitation | 1816 mm |
| Vegetation type | Mono-specific rubber tree (Hevea brasiliensis) plantation |
| Dominant Species (Overstory) | Rubber tree (Hevea brasiliensis Müll. Arg.) |
| Dominant Species (Understory) | Tropic ageratum (Ageratum conyzoides L.) |
| Canopy height | 8-9 m |
| Age | 4 years old |
| LAI | 1.5 |
| Soil type | Sandy clay loam at 0-1 m and Clay loam at 0.1-0.3 m (Phon Phisai series: Pp) |
Observation
Eddy Covariance method (CO2)
| System | Open-path system (LI-7500, LI-COR) |
|---|---|
| Wind speed | Three-dimensional sonic anemometer-thermometer (Campbell CSAT3) |
| Air temperature | Three-dimensional sonic anemometer-thermometer (Campbell CSAT3) |
| Water vapor | Open-path CO2/H2O analyzer (LI-7500, LI-COR) |
| CO2 | Open-path CO2/H2O analyzer (LI-7500, LI-COR) |
| Measurement height | 11.5 m |
| Sampling frequency | 20 Hz |
| Averaging time | 30 min |
| Data logger | CR5000, (Campbell Sci., USA) |
| Data storage | CF |
| Original data | Raw data |
Meteorology
| Observation items | Levels/Depth | Instrument |
|---|---|---|
| Global solar radiation(incoming) | 15 m | Net radiometer (CNR-1, Campbell) |
| Global solar radiation (outgoing) | 15 m | Net radiometer (CNR-1, Campbell) |
| Long-wave radiation(outgoing) | 15 m | Net radiometer (CNR-1, Campbell) |
| Long-wave radiation(outgoing) | 15 m | Net radiometer (CNR-1, Campbell) |
| Net radiation | 15 m | Net radiometer (CNR-1, Campbell) |
| PPFD (incoming) | 15 m | LI-190,Li-Cor Inc., Lincoln, NE, USA |
| PPFD (outgoing) | - | |
| Direct / diffuse radiation | 15 m | LI-COR Silicon Pyranometer (LI-200SA, Li-COR) |
| Direct / diffuse PPFD | - | |
| Air temperature | 15.5 m | Temperature and Relative Humidity Probe (Vaisala HMP50) |
| Humidity | 15.5 m | Temperature and Relative Humidity Probe (Vaisala HMP50) |
| Soil temperature | 0.2 m and 0.4,0.6,0.16,0.32,0.64, 1 m (three points) | Averaging Soil Thermocouple, TCAV Sensors , Campbell) and Thermocouple Type E |
| Soil heat flux | 8 cm ( two points) | Soil Heat Flux Plate (HFP01-L, Campbell) |
| Soil water content | 0.6,0.10,0.30,0.50,0.70, 1,1.50 m (three points) | TDR sensor (CS616, Campbell) |
| Wind speed | 16 m | Campbell 03002 R.M. Young Wind Sentry Set |
| Wind direction | 16 m | Campbell 03002 R.M. Young Wind Sentry Set |
| Barometric pressure | - | |
| Precipitation | 15 m | Tipping-bucket rainguage |
| CO2 concentration | 11.5 m | Open-path CO2/H2O analyzer (Li 7500, Li-Cor Inc., Lincoln, NE, USA) |
| H2O concentration | 11.5 m | Open-path CO2/H2O analyzer (Li 7500, Li-Cor Inc., Lincoln, NE, USA) |
Other
| Soil respiration | LI8100A-automated soil respiration (every 2 week) |
| Photosynthesis | - |
| Ecological investigation | Tree height, diameter, root growth and turnover, phenology, LAI and canopy structure, litter dynamics, sap flow velocity, water potential in tree |
Observation Period and Data Availability
| Measurement Period | from October 2012 to present |
|---|---|
| Measurement Frequency | Continuous |
| Data Availability | N/A |
Contact
Jessada Phattaralerphong (csnjdp [at] ku.ac.th) Faculty of Natural Resources and Agro-Industry, Kasetsart University Chalermphrakiat Sakonnakhon Province Campus59 Moo1 Sakonnakhon-Nakhonphranom Rd. Moung District, Sakonnakhon Province, 47000, Thailand Tel. +66 (0)42-731233, (0)42-731251 Ext. 2200 Fax. +66 (0)42-731250
Poonpipope Kasemsap (agrppk [at] ku.ac.th) Department of Horticulture, Faculty of Agriculture, Kasetsart University, 10900 Bangkok, 50 Paholyothin Road, Chatuchak, Bangkok. 10900. Thailand
Frederic Gay (frederic.gay [at] cirad.fr) Cirad Office, Hevea research Platform, Kasetsart University, 10900 Bangkok, Thailand Tel : +66-84-701-3037
[Micrometerorology] Jate Sathornkich (psdjate [at] ku.ac.th) [Sapflow] Tiwa Pakoktom (agrtwp [at] kua.ac.th) [Soil respiration] Chompunut Chayawat [Data processing] Duangrat Satakhun
Infrastructure
15m TIwer, Electric Power: DC, telephone
Research Fund
The Thailand Research Fund (TRF)