NFT: National Institute of Fruit Tree Science
![NFT site photos]()
General site details
| Site name | National Institute of Fruit Tree Science |
|---|---|
| AsiaFlux site code | NFT |
| Location | Fujimoto, Tsukuba, Ibaraki, Japan |
| Position | 36° 33´ N, 140° 8´ E |
| Elevation | 40 m above sea level |
| Slope | 0 degree |
| Terrain type | - |
| Area | 400 m2 |
| Fetch | 50-90 m |
| Climate | - |
| Mean annual air temperature | - |
| Mean annual precipitation | - |
| Vegetation type | Fruit farm |
| Dominant Species (Overstory) | Japanese pear |
| Dominant Species (Understory) | Poor vegetation of annual weeds (mowed several times a year) |
| Canopy height | 2.2-3.5 m (seasonally change) |
| Age | 22 years (2001) |
| LAI | 0 to 4 |
| Soil type | - |
Observation
Eddy Covariance method (CO2)
| System | open-path system |
|---|---|
| Wind speed | Gill research |
| Air temperature | - |
| Water vapor | Advanet E009b |
| CO2 | Advanet E009b |
| Measurement height | 3.5 m |
| Sampling frequency | 10 Hz |
| Averaging time | 20 min |
| Data logger | Not used |
| Data storage | Directly to PC (Dell) |
| Original data | - |
Meteorology
| Observation items | Levels/Depth | Instrument |
|---|---|---|
| Global solar radiation(incoming | - | Thermocouple type pyranometer (MS-61, EKO) |
| Global solar radiation (outgoing) | - | - |
| Long-wave radiation(outgoing) | - | - |
| Long-wave radiation(outgoing) | - | - |
| Net radiation | 5 m | Ventilated radiometer(CN11, EKO) |
| PPFD (incoming) | - | |
| PPFD (outgoing) | - | |
| Direct / diffuse radiation | - | |
| Direct / diffuse PPFD | - | |
| Air temperature | Just above canopy surface and above 0.8 m | Ventilated thermocouple psychrometer (handmade) |
| Humidity | Just above canopy surface and above 0.8 m | Dew point hygrometer (handmade) |
| Soil temperature | 0.05 m | Thermocouple |
| Soil water content | 0.1, 0.2 m | DIK-1600 |
| Wind speed | - | |
| Wind direction | - | |
| Barometric pressure | - | |
| Precipitation | - | |
| CO2 concentration | - | IRGA (Yokokawa electric ) |
Other
| Soil respiration | - |
| Photosynthesis | - |
| Ecological investigation | LAI, Fruit yield |
Observation Period and Data Availability
| Measurement Period | Apr. 1997 to Oct. 2000 (Apr. 2000 to Oct. 2000 for Eddy Covarience Method) |
|---|---|
| Measurement Frequency | From 0600 to 1800 every day from April to October |
| Data Availability | - |
Contact
Daiyu ITO (daiyu [at] cc.hirosaki-u.ac.jp) Toshihiko SUGIURA Haruyuki KURODA Teaching and Research Center for Bio-coexistence, Faculty of Agriculture and Life Science, Hirosaki University7-1, Shimobukuro, Fujisaki, Fujisaki, Aomori, 038-3802, JAPAN
Infrastructure
Electrical power (AC 100V)