Device and method for reducing rice field greenhouse gas emission by controlling irrigation through aeration

Abstract

The invention discloses a device and method for reducing rice field greenhouse gas emission by controlling irrigation through aeration. The device comprises an irrigation device, an aeration device, an air pump, a single-chip microcomputer and a lysimeter; the irrigation device comprises a water inlet, a casing pipe and a water outlet, the water outlet is communicated with the interior of the lysimeter through a pipeline, the interior of the lysimeter is filled with soil, an FDR probe is embedded in the soil, the single-chip microcomputer is connected with the FDR probe and the air pump through wires, the air pump is communicated with an air inlet of the aeration device through a guide pipe, and an outlet of the aeration device is communicated with the casing pipe. Accordingly, the moisture content of the soil in a rice field is monitored in real time through the single-chip microcomputer and controlled, when the FDR probe detects that the field moisture content of the rice field is lower than the lower limit of the soil moisture content in all growth periods of rice, irrigation is conducted, and aeration is conducted on the water. Accordingly, the structure is simple, the farmlandgreenhouse effect can be effectively lowered, the manufacturing cost is low, the efficiency is high, and the device and method can be applied and popularized in the fields of agriculture, scientificresearch and the environment.

Description

technical field

[0001] The invention belongs to the field of agricultural irrigation, and in particular relates to a device and a method for reducing greenhouse gas emission in paddy fields by using air-entrainment to control irrigation. Background technique

[0002] The greenhouse effect is an environmental problem that people have to pay attention to at present. The most important greenhouse gas is CO 2 、CH 4 and N 2 O three kinds, and CH 4 As an example, the irrigated paddy field is atmospheric CH 4 One of the most important anthropogenic sources of emissions, because the submerged anaerobic environment and lower Eh (oxidation-reduction potential) are favorable for CH 4 production, in addition, rice paddies produced N 2 O and CO 2 It is also not to be underestimated. In response to the current situation of water shortage in my country, water-saving irrigation technology has been paid attention to and developed. Controlled irrigation is one of the widely proven wate...

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