Device for simulating seawater immersion of coastal wetland soil greenhouse gas release response

Abstract

The invention relates to a device for simulating seawater immersion of coastal wetland soil greenhouse gas release response, and relates to an environment ecological simulation experiment device. The device comprises a cultivating tank, a water supplying bottle, a guide pipe, a water control valve, a filter net, filter sand and a bracket, wherein the cultivating tank consists of a hollow pipe and a pipe cover; the lower end of the cultivating tank is plugged by using the pipe cover, a guide pipe is arranged at the center of the pipe cover, and the water control valve is arranged on the guide pipe; one end, which is connected with the bottom of the cultivating tank, of the guide pipe is sequentially covered by the filter net and a filter sand layer, and the other end of the guide pipe is connected with the bottom of the water supplying bottle by means of a rubber plug; a water injecting hole is formed in the top of the water supplying bottle; the cultivating tank and the water supplying bottle are supported by the brackets with different heights, wherein the bracket of the water supplying bottle is higher than the top end of the cultivating tank. The device is capable of enabling soil moisture and salt dynamics in the cultivating tank to achieve the purpose of being close to an actual environment, so that the defect of material loss in the cultivating tank is overcome, and the water level in the tank can be simultaneously controlled.

Description

technical field [0001] The invention relates to an environmental ecological simulation experiment device, in particular to a device for simulating coastal wetland soil greenhouse gas release response to seawater immersion. Background technique [0002] Due to its unique hydrological conditions, huge productivity and organic matter reserves, coastal wetlands have become an important type of terrestrial ecosystem. The release of greenhouse gases from coastal wetlands is considered to be an important factor affecting global change, and has been widely concerned by the environmental and ecological circles. As an extremely important ecological factor in the land-sea interaction zone, salinity has a significant impact on key biogeochemical processes of soil carbon and nitrogen in coastal wetlands. Under the background of climate change, the range of seawater intrusion caused by sea level rise expands, leading to the rise of groundwater level, and the salt is carried to the soil s...

AI Technical Summary

Problems solved by technology

The seawater surface flow method adds different concentrations of seawater from the soil surface through a conduit. This method is not easy to control the water level in the culture tube. At the same time, the gravity flow generated by adding seawater from the soil surface is inconsistent with the actual situation. There are indoor cultivation conditions and field real conditions. The limitations of the large difference in environmental conditions

The seawater immersion method immerses the culture tank into a container filled with seawater of a certain concentration, so that the soil column in the tank is in the expected water-salt environment. Although the water-salt dynamics of the soil column in this method conforms to the actual law, there are The defect that the material loses to the external sea water

Images