Method for measuring soil CO2 flux tidal flat wetland during early and later intertidal periods
A flux and wetland technology, which is applied in the field of soil CO2 flux measurement in the morning and evening intertidal periods of tidal flat wetlands, can solve the problems of the influence of soil properties at the measurement point, the narrow space below, and the difficulty of walking, so as to avoid insufficient power supply for long-term measurement, Avoid instrument damage and reduce workload
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Embodiment 1
[0023]The implementation site is located in the Quanzhou Bay Mangrove Nature Reserve in Fujian Province, and it was carried out on September 8, 2013.
[0024] (1) CO 2 CO in the flux model 2 Concentration is obtained. In the middle and high tide area of Luoyang Village in the upper reaches of the Luoyang River, the candela community was selected as the standard sample point. Choose to use the portable soil carbon dioxide analyzer LI-840 (LI-COR company production, USA) for CO 2 concentration determination. After the value of the instrument is stable, measure for 10 minutes every time period, and the data recording frequency is 10s.
[0025] (2) CO 2 Instantaneous CO at each time period in the flux model 2 Flux acquisition. After the measurement is completed, export the data and create a CO 2 The relationship between concentration and time, in the sigmaplot software, using the rectangular hyperbolic equation (where dependent variable y is CO 2 Concentration value,...
Embodiment 2
[0038] The implementation site is located in Quanzhou Bay Mangrove Nature Reserve, Fujian Province.
[0039] (1) CO 2 CO in the flux model 2 Concentration is obtained. In the mid-high tide area at Yutou Village in the middle reaches of the Luoyang River, the tung flower tree community was selected as the standard sample point. Select the 1h, 2h, 3h, 4h, 5h, and 6h when the tide recedes in the morning of September 9, record the moment when the tide recedes as 0h, and use a portable soil carbon dioxide analyzer LI-840 (LI-COR Company production, USA) for CO 2 concentration determination. After the value of the instrument is stable, measure for 10 minutes every time period, and the data recording frequency is 10s.
[0040] (2) CO 2 Instantaneous CO at each time period in the flux model 2 Flux acquisition. After the measurement is completed, export the data and create a CO 2 The relationship between concentration and time, in the sigmaplot software, using the rectangular ...
Embodiment 3
[0049] The implementation site of this example is located in the lower reaches of Luoyang River in Quanzhou Bay Mangrove Nature Reserve, Fujian Province. The purpose of this example is to use the model obtained in Example 1 to directly measure soil CO in low tide areas. 2 flux.
[0050] (1) Three soil CO2 values were obtained quickly from three candela colonies in the downstream low tide area with a portable soil carbon dioxide analyzer LI-840 one hour after the morning tide receded on June 19, 2013. 2 concentration value.
[0051] (2) The CO in (1) 2 Concentrations brought into the soil flux under the candela colonies obtained—instantaneous CO 2 concentration formula The corresponding soil CO can be obtained 2 The flux is the predicted value, and the results are shown in Table 3.
[0052] Table 3. Soil CO in three sampling points in the low tide area 2 flux prediction
[0053]
[0054] Put three different CO in Table 3 2 Concentration corresponding to CO 2 Flux...
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