Soil microbe fumigating device

Abstract

The invention discloses a soil microbe fumigating device, which includes an accommodating cavity body and a cover body, wherein a gas pipeline is arranged at the top of the cover body, a valve is arranged on the gas pipeline, and a plurality of through holes a are formed at the bottom of the cover body; a baffle plate is arranged in the middle of the accommodating cavity body, a plurality of through holes b are arranged on the baffle plate, and the through holes b correspond to the through holes a in both position and size; the fumigating device also includes a cup body, the bottom part of the cup body is a mesh screen, and the cup body is matched with the through holes a and the through holes b; and a container is arranged in a base of the accommodating cavity body and communicated with an upper part cavity body of the accommodating cavity body through a multiport valve. The fumigating device adopts the active fumigating technology, so that chloroform vapor can only reach the air outlet through the soil sample along with the suction force, and is discharged to the outside through the gas pipeline; and compared with the conventional method and equipment, the contact area between the soil and the chloroform is enlarged, the vapor flux is increased, and then the fumigating efficiency is improved and the fumigating time is shortened.

Description

Technical field [0001] The invention relates to a soil microbial fumigation device, which is suitable for the determination of microbial carbon and nitrogen content in the soil. Background technique [0002] Existing dryers are mostly made of glass. There is a perforated ceramic plate in the middle of the base, which can be taken out. The cover is covered with a valve to control the opening of the container. When using it, put the soil in a small beaker and put it in the dryer. Apply petroleum jelly to the upper and lower joints of the dryer, and open the upper valve to connect the vacuum pump to pump the air. After the chloroform boils for 1 minute, close the valve and the vacuum pump; the existing equipment has the following shortcomings: poor air tightness, easy damage to the glass material, and chloroform vapor during pumping Without passing through the soil, it just fills the container, and the fumigation is not thorough. Summary of the invention [0003] The purpose of the ...

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Problems solved by technology

[0002] The existing desiccators are mostly made of glass, and there is a ceramic plate with a hole in the middle of the base, which can be taken out. There is a valve on the top cover to control the opening of the container. When in use, put the soil into a small beaker and put it into the desiccator. Apply vaseline to the upper and lower joints of the dryer to seal the container, open the upper valve to connect the vacuum pump to pump air, and close the valve and vacuum pump after 1 minute of chloroform boiling; the shortcomings of the existing equipment are: poor air tightness, glass material is easily damaged, and chloroform vapor when pumping air Does not pass through the soil, just fills the container, and the fumigation is not thorough

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