In-situ automatic measurement method of CO2 of root system

Abstract

The utility model relates to an in-situ automatic measurement method of CO2 of a root system. Gas sampling tubes are buried layer by layer at desired depths in the soil, a surface soil respiration chamber is mounted on the surface of the soil at the upper part, a solenoid pilot valve and a suction pump are controlled by a single chip microcomputer, and the gases extracted in all the layers are delivered to a CO2 analyzer for measurement respectively, so as to achieve the purpose of automatically measuring and recording the respiration at different measurement points by use of one infrared CO2analyzer. Eleven measuring pipes for sample collection can be connected into the method at the same time and an auxiliary environmental sensor can also be connected into the method at the same time, so as to enable the researcher to analyze the correlation of data. The single chip microcomputer stores the collected data in a chip of a memory unit, so as to provide convenience to the researcher during the multi-stage data analysis. The gas samples are divided into two groups, so as to achieve the purpose of long-term automatic comparative test in the two groups. Therefore, the method is widelyused for dynamically monitoring the respiration of the root system of a wild plant, and has the advantages of good uniformity of data and low investment in equipment.

Description

technical field [0001] The present invention relates to a kind of root system CO 2 In-situ automatic measurement method, using this method can realize in-situ automatic measurement of soil respiration and plant root respiration, and can calculate root CO 2 conversion rate, soil CO 2 Respiration rate, for soil CO 2 A study of apparent and potential. Background technique [0002] At present, soil carbon is recognized as the "black hole" of global carbon loss. Land use change has an impact on the soil respiration process, and any slight change in land use will affect soil CO2. 2 Flux has a huge impact, soil CO 2 Flux determination and soil respiration mechanism research are worldwide problems and hotspots. The early traditional respiration measurement method is to bury the soil into the exhaust pipe, manually extract the gas, put it into the sampling bag, and bring it back to the laboratory for analysis with a spectrometer. This method has a long experimental cycle, many c...

AI Technical Summary

Problems solved by technology

[0003] Many soil CO 2 Flux in-situ measurement technology and devices can only reflect the flux at the interface between the soil and the atmosphere, and cannot refine the component of soil respiration, resulting in the inability to study the mechanism of soil respiration in depth, and requires a complete CO 2 With the cooperation of the analyzer, it is impossible to realize the repeated comparative observation of multiple experimental areas

Due to the need for manual operation, it is inconvenient to use and exposes many shortcomings and drawbacks

Experiments have shown that soil CO 2 The measurement takes a long time to balance after the soil layer structure is disturbed, so it is not suitable for field portable measurement

Images