Device suitable for coastal wetland soil respiration measurement

Abstract

The utility model belongs to the field of determination of wetland soil parameters, and particularly relates to a device suitable for coastal wetland soil respiration measurement, in particular to in-situ measurement equipment, which can be used for measuring the respiration of the coastal wetland soil without hindering the release effect of tidal water fluctuation on carbon dioxide in the coastal wetland soil. The interference of accumulated water in the breathing ring on a soil breathing measurement result after ebb tide is prevented. The device comprises a sealing device, a permeable ring, an indication cover and a fixing ring, the sealing device is composed of a stainless steel ring column with a built-in thread and an external hand lifting ring, and the hand lifting ring is fixedly connected with the stainless steel ring column in a welding mode. The permeable ring is composed of an external threaded stainless steel ring column with a hole, and is screwed with the sealer through threads; the indicating cover is composed of a stainless steel disc, and the indicating cover and the water permeable ring are fixedly connected in a welding mode. The fixing ring is composed of a stainless steel ring, and the fixing ring can be directly and completely inserted into soil to be detected.

Description

Technical Field

[0001] The utility model belongs to the field of wetland soil parameter measurement, and specifically relates to an in-situ measurement device for soil respiration in coastal wetlands after low tide. The device can ensure the influence of tide on carbon dioxide (CO2) emission in coastal wetland soil, and can also avoid water accumulation in the breathing ring after low tide affecting soil respiration measurement. Background Art

[0002] Coastal wetlands are important global carbon sinks, and their soil respiration is a key component of the carbon cycle. Soil respiration refers to the release of carbon dioxide through metabolic activities by microorganisms, plant roots, and animals in the soil. This process is influenced by multiple factors, including soil moisture, temperature, salinity, and vegetation type. Studies have shown that soil respiration in coastal wetlands exhibits significant monthly variability, with higher values ​​in summer and lower values ​​in winter, and significant differences between different vegetation types. Measuring wetland soil respiration is crucial for understanding and assessing the global carbon cycle and its impact on climate change. Soil respiration involves the metabolic activities of both microorganisms (heterotrophic respiration) and plant roots (autotrophic respiration), and is a key component of the carbon cycle. Measuring this process allows assessment of wetland carbon sources and sinks, which is crucial for understanding and predicting global climate change. Carbon dioxide (CO2) released during wetland soil respiration is a significant greenhouse gas. Accurately measuring its emissions is crucial for assessing the impact of human activities on the climate system. However, terrestrial soil respiration measurement equipment cannot withstand the influence of tidal fluctuations in coastal wetlands, affecting experimental results and hindering subsequent research. The device can measure the soil respiration rate in situ while ensuring the most realistic state of the soil, providing a scientific basis for soil gas exchange research. Utility Model Content

[0003] The utility model provides a simple soil respiration rate in-situ measurement and detection device suitable for coastal wetlands, which overcomes current problems by adopting an easy-to-operate solution.

[0004] To achieve the above purpose, the technical solution of the present utility model is implemented as follows:

[0005] This utility model provides a device suitable for measuring soil respiration in coastal wetlands. The device comprises a sealer, a permeable ring, an indicator cap, and a fixing ring. The sealer comprises a stainless steel ring column with internal threads and an external handle ring, which is fixedly connected to the stainless steel ring column by welding. The permeable ring comprises a stainless steel ring column with holes and external threads, which is connected to the sealer by threads. The indicator cap comprises a stainless steel disc, which is fixedly connected between the permeable ring and the fixing ring by welding. The fixing ring comprises a stainless steel ring. (The fixing ring can be directly and fully inserted into the soil to be measured.)

[0006] Preferably, the sealer, water permeable ring, indicator cover and fixing ring are all made of stainless steel, and the surface of the stainless steel is preferably coated with one or more layers of corrosion-resistant material, preferably seawater corrosion-resistant material.

[0007] Preferably, the entire device can be portable and moved by means of a carrying loop on the sealer.

[0008] Preferably, the holes on the permeable ring can maintain the original state of the soil to the greatest extent possible so that the soil inside the ring is still affected by the tidal effect like the surrounding soil. Water flows out through the pores in a timely manner to avoid the situation where other soil respiration measuring devices are damaged by water accumulation due to rain.

[0009] Preferably, the lower end fixing ring can be conveniently inserted into the target depth through the indicator cover to ensure the accuracy of the measurement. In addition, because the indicator cover has sufficient width and counterweight, it can be firmly installed in the soil to avoid the device from tipping over due to tides.

[0010] Preferably, the length of the fixing ring can be selected according to the purpose of use, and the total respiration rate and heterotrophic respiration rate can be measured separately by whether the plant roots are cut off, and the autotrophic respiration rate = total respiration rate - heterotrophic respiration rate, so as to achieve the purpose of distinguishing different components of soil respiration.

[0011] Compared with the existing technology, the utility model has the following advantages:

[0012] This device is convenient to carry and its materials are easily accessible. Because all components are made of corrosion- and salt-resistant materials, it is well-suited to the high-salt, highly corrosive environments found in coastal wetland systems. A carrying loop on the sealer also facilitates portability. At the end of the experiment, the device can be easily removed and stored using the loop after threading the device together. Because coastal wetland systems are often disturbed by tidal fluctuations, traditional soil respiration devices fail to accurately reflect the soil's true state. This device incorporates a permeable ring, allowing seawater to pass through unimpeded, resulting in a more natural representation of the soil and avoiding experimental variations due to human interference. This design also eliminates issues such as rain accumulation during installation and use in natural conditions. The addition of an indicator cap allows for easy insertion to a fixed depth, and the addition of a counterweight stabilizes the device, preventing problems such as tipping over due to tidal fluctuations, making it more adaptable to coastal environments. The retaining ring acts as a barrier and base, isolating the soil within the ring from the surrounding soil to achieve the desired experimental results. Adjusting the length of the retaining ring also allows for different experimental results. When the device is in use, the upper sealer is connected to the water-permeable ring through a thread, so that the lower part of the entire device becomes a sealing device, and the upper part is connected to the carbon dioxide detector for measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view of the present utility model.

[0014] Figure 2 It is a front view of the sealer of the present utility model.

[0015] Figure 3 This is a front view of the water permeable ring of the utility model.

[0016] Figure 4 It is a front view of the indicator cover of the utility model.

[0017] Figure 5 It is a front view of the fixing ring of the utility model.

[0018] In the figure, a or 1 is a sealer, b or 4 is a water-permeable ring, c or 6 is an indicator cover, d or 7 is a fixing ring, 2 is a hand ring, 3 is an internal thread, and 5 is an external thread. DETAILED DESCRIPTION

[0019] To better and more clearly explain the technical content of this utility model, I will provide specific examples and drawings to further illustrate this utility model. The examples described in this embodiment are only part of the embodiments of this utility model. Examples obtained by other technicians without creative work are all within the scope of protection of this utility model.

[0020] Reference Figures 1 to 5This utility model provides a device suitable for measuring soil respiration in coastal wetlands, comprising a sealer, a permeable ring, an indicator cap, and a retaining ring. The sealer has two external handles for easy portability, and internal threads connect to external threads on the permeable ring, allowing for easy removal after the experiment.

[0021] This soil respiration measurement device has been further optimized with a permeable ring. Coastal wetlands are often strongly affected by tides. This permeable ring adapts to this dynamic environment, allowing seawater to flow in and out freely during the measurement process, simulating the natural exchange of soil moisture and salt. This not only reduces tidal interference with soil respiration measurements but also helps maintain the soil's natural state, making the measurement results more accurate and reliable.

[0022] Further optimization, the device's indicator cap provides an intuitive reference, making it easier for operators to insert the device at a specific height, ensuring consistency in experiments. The added counterweight ensures the device remains stable during tidal periods, preventing displacement or tipping due to the impact of tidal water, while also protecting the surrounding environment and minimizing interference with experiments.

[0023] Further optimization has been made. The fixing ring at the bottom of the device not only isolates the soil inside the device from the surrounding soil, but also serves as a base. By adjusting the length of the fixing ring, the depth of the device can be adjusted according to different experimental requirements and soil types, thus adapting to various soil conditions and research objectives. The sealer at the top of the device is connected to the permeable ring via threads, ensuring the sealing of the bottom part of the device, preventing interference from external moisture, while also protecting the internal soil from the external environment. The top part is connected to a carbon dioxide detector, allowing the device to accurately measure soil respiration.

[0024] The method of using the utility model comprises the following steps:

[0025] Installation: Adjust the length of the fixing ring d according to the experimental purpose and insert it directly into the soil to be tested until it reaches the indicator cap c. After the soil to be tested in the device is in a stable state, perform subsequent measurements.

[0026] Measurement: Before measurement, tighten the sealer a and the permeable ring b to seal the hole in the permeable ring b, and then connect the upper opening to the soil respiration detection device for subsequent measurement.

[0027] Recycling: After the experiment is completed, pull out the device through the handle ring on the sealer for recycling.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device suitable for measuring soil respiration in coastal wetlands, characterized in that: It includes a sealer, a water-permeable ring, an indicator cover, and a fixed ring; the sealer is composed of a stainless steel ring column with a built-in thread and an external hand ring, and the hand ring and the stainless steel ring column are fixedly connected by welding; the water-permeable ring is composed of a stainless steel ring column with an external thread and a hole, and is screwed to the sealer through a thread; the indicator cover is composed of a stainless steel disc, and is fixedly connected between the water-permeable ring and the fixed ring by welding; the fixed ring is composed of a stainless steel ring.

2. The device according to claim 1, characterized in that The sealer, water permeable ring, indicator cover and fixing ring in the device are all made of stainless steel.

3. The device according to claim 2, characterized in that The surface of the stainless steel material is coated with one or more layers of corrosion-resistant material.

4. The device according to claim 3, characterized in that The corrosion-resistant material is selected from seawater corrosion-resistant materials.

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