Cultivation device and measurement method for measuring soil organic carbon mineralization capacity

Abstract

The invention discloses a culture device with a function of measuring a soil organic carbon mineralization capacity and a measuring method. The culture device comprises a culture box and a nitrogen supply device. A soil sample culture tube and a triangular bottle are arranged in the culture box. Before culture, nitrogen gas is fed into the soil sample culture tube so that CO2 in the soil sample culture tube is completely discharged, soil in the soil sample culture tube is cultured, released CO2 gas is collected by the triangular bottle and a mineralization rate is measured. The culture device and the soil organic carbon mineralization capacity measuring method realize continuous, accurate and effective measurement of a soil organic carbon mineralization capacity and realize a low cost.

Description

technical field [0001] The invention belongs to the technical field of soil sample cultivation, and in particular relates to a cultivation device for measuring the mineralization capacity of soil organic carbon and a method for measuring the mineralization capacity of soil organic carbon by using the device. Background technique [0002] Soil organic carbon mineralization is a key process in the dynamic change of soil organic carbon, which refers to the metabolism of soil through animals, plants and microorganisms, and the release of CO 2 the process of. This process is directly related to the release and supply of soil nutrients, as well as the formation and emission of greenhouse gases. Control the factors affecting organic carbon mineralization (such as substrate, temperature, humidity, etc.) to cultivate the soil, and measure the mineralization rate of soil organic carbon at different types and depths under corresponding conditions. Vegetarian balance is of great signi...

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Problems solved by technology

First, the method cannot exclude the CO contained in the jar itself 2 The impact on the experiment, secondly, during the experiment, it is necessary to open the jar several times to take out and replace the NaOH solution, and it is impossible to continuously collect the CO released during the soil cultivation process. 2 , the experimental operation is cumbersome, and every time the jar is opened, it will cause certain errors in the experiment

In addition, most other soil organic carbon mineralization culture methods ignore the CO contained in the culture container itself. 2 The effect on the experimental results

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