Maintenance Services Successfully Completed for Fujian Tingjiangyuan National Nature Reserve Administration

In late March 2024, commissioned by the Fujian Tingjiangyuan National Nature Reserve Administration (hereinafter referred to as the "Administration"), DianJiang Group conducted scheduled troubleshooting, equipment overhaul, and instrument maintenance at the reserve's comprehensive experimental station. With the active cooperation of the Administration, DianJiang Group successfully completed all on-site maintenance tasks, effectively enhancing instrument performance and extending equipment service life.

In partnership with Fujian Agriculture and Forestry University, the Administration procured a suite of advanced monitoring equipment through Point-Tech—including soil lysimeters, sap flow meters, water quality monitoring systems, and both standard and gradient meteorological stations. These tools are utilized for field environmental monitoring, providing reliable data for critical ecological research.

Core Monitoring Systems and Technologies

Sap Flow Monitoring System

This system utilizes the Thermal Dissipation Probe (TDP) method to measure stem flow and determine plant water consumption. Since the heating process typically raises temperatures by only 1°C to 5°C, it is harmless to the plants. This method is scientifically proven effective for the vast majority of crops and tree species. The probes require no calibration and directly measure sap flux through energy balance and the thermal convection rate of plant fluid flow.

Lysimeter Measurement System

Designed and manufactured by DianJiang Group, this system serves as a sophisticated tool for evaluating soil water utilization. It is essential for studying water balance, matter balance, and soil solute transport. A key feature is its ability to quantify actual evapotranspiration (ET) for both bare soil and vegetated land.

Water Quality Monitoring System

Designed for continuous, automated monitoring of observation wells, rivers, and lakes, this system is capable of long-term, uninterrupted field operation. It measures a wide array of parameters, including:

• Water level, temperature, and turbidity (TSS).

• Conductivity (TDS, salinity, density).

• Dissolved oxygen (DO), pH, and Oxidation-Reduction Potential (ORP).

• Ion concentrations (Nitrate, Fluoride, Chloride, Potassium, Ammonium, Sodium, Calcium, etc.).

Gradient Meteorological Station

This high-precision system is designed to measure the vertical spatial distribution of meteorological elements. It directly monitors average atmospheric characteristics and turbulence, enabling research into boundary layer energy, radiation, matter exchange, and atmospheric disturbances across different underlying surfaces. It features WMO-certified sensors and a modular design for easy installation and maintenance.

Automatic Meteorological Station

This station provides 24/7 monitoring of ten key elements: wind direction, wind speed, rainfall, air temperature, relative humidity, barometric pressure, solar radiation, photosynthetically active radiation (PAR), and soil temperature/moisture. Custom sensors for evaporation, sunshine duration, and net radiation can also be integrated. Measurement heights typically range from 2 to 6 meters, adjustable based on vegetation height.

About Fujian Tingjiangyuan National Nature Reserve

Formerly known as the Guilongshan Provincial Nature Reserve (established in June 2001), the reserve was expanded from the original Zhonghuang Black Chinquapin Forest Reserve. It now incorporates significant populations of Taxus wallichiana var. mairei (Chinese Yew) from Guilongshan and Cupressus funebris (Chinese Weeping Cypress) from Dabeishan.

Since its inception, under the guidance of the Changting County Party Committee and Government, the Administration has focused on building a technologically advanced demonstration site for ecological civilization. By prioritizing infrastructure, strengthening protection protocols, and focusing on strategic planning, the reserve has achieved significant milestones in conservation and research.