Field in-situ intelligent airtight vegetable growth chamber

Abstract

A field in-situ intelligent airtight vegetable growth chamber is provided with a chamber body, a temperature automatic control system, a carbon dioxide automatic control system, and a weeding, pesticide spraying and watering system; the chamber body is provided with an upper part chamber body and a lower part chamber body, the upper part chamber body is a transparent body with a cover and without bottom, the lower part chamber body has no cover or bottom, the upper border of the lower part chamber body is provided with a water tank, the lower border of the upper part chamber body is placed in the water tank and sealed by water, the lower part chamber body is buried in soil, and vegetables are cultured in the soil in the chamber body; the temperature automatic control system is provided with two temperature and moisture sensors which are respectively arranged inside and outside the chamber body, the collected data are sent to a data collecting controller and a computer to be compared, when the temperature inside the chamber body is higher than the set value of temperature outside the chamber body, a relay starts a secondary refrigerating system to work; the carbon dioxide automatic control system pumps the gas in the chamber to a carbon dioxide gas detector for detection, the detection result is compared with the set concentration, if the detection result is higher than the set concentration, the normal closed outlet of an electromagnetic valve is opened, carbon dioxide gas enters into the chamber body after being subject to sodium hydroxide absorption, if the detection result is lower than the set concentration, the electromagnetic valve is opened to supplement high-purity carbon dioxide, and if the concentration of gaseous carbon dioxide is within normal range, the gas is directly returned to the chamber body.

Description

technical field [0001] The invention relates to the research of biological nitrogen fixation ability, especially a field in-situ intelligent airtight plant growth box, which can be used for research on isotope labeling, carbon and nitrogen cycles, sources of organic pollutants and volatile inorganic and organic compounds emitted by plants, and belongs to soil Science, ecology, microbiology, pollution biology, plant nutrition, plant physiology and other technical fields. Background technique [0002] The production and use of nitrogen fertilizers has increased crop yields and basically solved the contradiction between global population growth and food supply, but it has also exacerbated global environmental changes and caused pollution to the atmosphere, soil and water. Biological nitrogen fixation is the use of atmospheric N by microorganisms 2 As raw material, synthesize the nitrogen source needed for biological growth. Using natural biological nitrogen fixation can reduc...

AI Technical Summary

Problems solved by technology

This method has the following deficiencies: first, the soil conditions have changed a lot when the soil is brought back to the laboratory from the field; second, the conversion coefficients of acetylene reduction into biological nitrogen fixation are not uniform, resulting in deviations in the estimation of nitrogen fixation capacity in paddy fields; third, The acetylene method is an instant value, and it is impossible to carry out long-term experiments. Using the instant value instead of the rice growth period will cause huge errors

Conventional refrigerators such as air conditioners are used to cool our field plant growth chambers. Due to frequent temperature changes in the growth chambers, the refrigerators start very frequently, resulting in self-protection of the compressor or burning the compressor and making the system unable to operate normally.

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