Soil culture device with small air collector

Abstract

The invention relates to a soil culture device with a small air collector. The soil culture device comprises a culture dish, a pored cover and an air collector, wherein the pored cover is arranged on the upper part of the culture dish, and the pored cover is connected with the air collector; the culture dish is arranged as a hollow container with a sealed bottom, and an external thread is arranged on an outer wall of the upper part of the culture dish; the pored cover is arranged as a hollow container with a sealed top, and an internal thread which is in thread fit with the external thread of the culture dish is arranged on an inner wall of the lower part of the pored cover; an air hole is formed in the outer wall or top of the pored cover, and an exhaust pipe with a switching valve is hermetically arranged in the air hole; the air collector is arranged as a hollow container with a sealed bottom, an air rubber plug is arranged at the top of the air collector, and an air collecting hole is formed in the side wall of the air collector; and an air guide pipe with a switching valve is hermetically arranged in the air collecting hole. The soil culture device can reduce measurement errors and lower test cost.

Description

technical field [0001] The invention relates to the technical field of agricultural soil cultivation, in particular to a soil cultivation device with a small gas collector. Background technique [0002] Soil and air are important factors to ensure the growth and development of crops. Through the exchange process of soil and gas, the crop production system can obtain various minerals and water needed for growth, and at the same time, discharge gases into the atmosphere. Among them, the emission of soil gas is an important manifestation of soil processes and an important factor affecting soil properties. Therefore, the study of soil gas emission is an important part of agricultural environmental science research, which is beneficial to improving crop yield and quality. [0003] At present, the research on soil gas emission mainly adopts field test observation (mainly placing a dark box in the field, covering the crops, extracting gas for measurement, and the test results are a...

AI Technical Summary

Problems solved by technology

Among them, the culture absorption method is mainly to put a small bottle containing 0.1mol / L sodium hydroxide (NaOH) solution in the culture vessel, absorb the carbon dioxide released by the soil culture device during the culture, and use the indicator or precipitation to measure the sodium hydroxide solution. The amount of carbon dioxide absorbed, this method is simple and easy, but the accuracy of the measurement results is poor

Gas chromatography mainly uses negative pressure to extract the gas released from the soil culture device during the cultivation period to the gas storage cylinder, and then uses the chromatograph to measure the gas. lead to large errors in measurement results

The airtight static culture method, ventilation culture method and carbon dioxide sensor are mainly measured by some instruments, such as the LI-4900 breathing chamber for measurement, but the carbon dioxide sensor is too expensive to be used normally, and can only measure carbon dioxide, which restricts In-depth advancement of scientific research work in related fields

Therefore, the current method for measuring soil respiration gas emissions has technical problems such as difficult gas collection, large measurement errors, and high testing costs in simulation tests. device is important

Images