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

A technology of greenhouse gas and aeration device, which is applied to watering devices, gardening methods, botanical equipment and methods, etc., can solve the problems of difficulty in adjusting the frequency and time of irrigation, and achieves the improvement of absorption of water and nutrients, reduction of CH4 The effect of low emission and low installation cost

Inactive Publication Date: 2019-11-26
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the invention: The purpose of the present invention is to provide a device and method for reducing greenhouse gas emissions in paddy fields by using aerated controlled irrigation to solve the problem that it is difficult to adjust irrigation frequency and irrigation time when aerated irrigation is coupled with controlled irrigation

Method used

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

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Embodiment 1

[0033] like figure 1 and figure 2 As shown, the present invention is a device for reducing greenhouse gas emission in paddy fields by controlling irrigation with aeration, comprising an irrigation device 1, an aeration device 2, an air pump 4, a single-chip microcomputer 5 and a lysimeter 11, and the irrigation device 1 includes a water inlet 101, a sleeve The pipe 104 and the water outlet 106, the casing 104 is also provided with a deflector 102, an injector 103, a spoiler 107 and a diffuser 105 in sequence along the water flow direction,

[0034] After the irrigation water enters the casing 104 from the water inlet 101, the air enters the casing 104 through the aeration device 2, and in the casing 104, flows through the deflector 102, sprays from the injector 103, disturbs the flow from the spoiler 107 and the diffuser 105 After dispersion, the water and air are highly dispersed to produce micro- and nano-scale micro-bubbles, and the water containing micro-bubbles enters t...

Embodiment 2

[0048] On the basis of Embodiment 1, the device of the present invention manually keeps the air pump 4 in the closed state, and maintains the controlled irrigation state.

[0049] The measured rice yield and greenhouse gas emissions are shown in the table below:

[0050] Table 2 Composition of rice yield and greenhouse gas emissions in paddy fields under controlled irrigation

[0051] Number of spikes per hole Effective spike number seed setting rate Thousand Kernel Weight Sample output CH 4 flux

Embodiment 3

[0053] On the basis of Embodiment 2, the device of the present invention opens the solenoid valve 12, closes the single-chip microcomputer 5, and maintains a conventional irrigation state.

[0054] The measured rice yield and greenhouse gas emissions are shown in the table below:

[0055] Table 3 Rice yield composition and greenhouse gas emissions in paddy fields under conventional irrigation

[0056] Number of spikes per hole Effective spike number seed setting rate Thousand Kernel Weight Sample output CH 4 flux

[0057] It can be seen that the greenhouse gas emission of controlled irrigation is smaller than that of conventional irrigation, and the yield is not much different, while the controlled irrigation of aerated water significantly reduces the greenhouse gas emissions of rice fields, especially CH 4 emissions, and the output has also increased to a certain extent.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G25/16A01G25/06A01G7/06
CPCA01G7/06A01G25/06A01G25/167
Inventor 江赜伟杨士红庞晴晴
Owner HOHAI UNIV
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