CN114020080B - Micro-nano air entrainment-based automatic rice field irrigation and drainage system and method - Google Patents

Abstract

The invention discloses an automatic irrigation and drainage system for paddy fields based on micro-nano aeration, comprising a water pump and a micro-nano bubble generator. It is connected with the water inlet of the micro-nano bubble generator, and the water outlet of the micro-nano bubble generator is connected to the paddy field to be irrigated through a third pipeline; the third pipeline is provided with a dissolved oxygen sensor, and the third pipeline is provided with a first electromagnetic The valve, the dissolved oxygen sensor and the first solenoid valve are respectively connected with the first programmable controller. An automatic irrigation and drainage method for paddy fields based on micro-nano aeration. The water pump and the micro-nano bubble generator are turned on, the water in the irrigation water source is pumped into the micro-nano bubble generator, and the water pumped into the micro-nano bubble generator is injected into the micro-nano bubble generator. , the water flowing out of the micro-nano bubble generator is injected into the paddy field to be irrigated. The invention can avoid the occurrence of water quality deterioration in rice fields after the wheat straws are returned to the fields in the rice-wheat rotation area.

Description

A kind of paddy field automatic irrigation and drainage system and method based on micro-nano aeration

technical field

The invention relates to the technical field of irrigation equipment, in particular to a paddy field automatic irrigation and drainage system and method based on micro-nano aeration.

Background technique

Straw returning is an agronomic measure that has been widely used in recent years, and is of great significance for cultivating soil fertility and improving crop quality and yield. However, under the rice-wheat rotation farming method in the rice-growing areas of southern my country, the return of wheat straw to the field brings new problems in rice irrigation management. Quantity) increased, and the water quality of the field surface deteriorated. This is because, during the flooding of paddy fields in the rice-wheat rotation area, the wheat straw is naturally decomposed in the water environment, and will emit nitrogen, phosphorus, organic matter and other substances, thus forming an important part of agricultural non-point source pollution. The ammonium nitrogen is volatilized, and malodorous gases such as ammonia are generated. In addition, during the flooding process, the straw is in an anaerobic environment, and the material in the soil mainly undergoes a reduction reaction.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a kind of paddy field automatic irrigation and drainage system and method based on micro-nano aeration, in order to solve the above-mentioned problems in the prior art, to avoid the deterioration of the water quality of the paddy field after the wheat straw is returned to the field in the rice-wheat rotation area, and to cause damage to the growth of rice. occurrence of injury.

For achieving the above object, the present invention provides the following scheme:

The invention provides an automatic irrigation and drainage system for paddy fields based on micro-nano aeration, including a water pump and a micro-nano bubble generator. The water inlet of the water pump is connected to the irrigation water source through a first pipeline, and the water outlet of the water pump is The second pipeline is communicated with the water inlet of the micro-nano bubble generator, and the water outlet of the micro-nano bubble generator is connected to the paddy field to be irrigated through a third pipeline; the third pipeline is provided with a dissolved oxygen sensor , the third pipeline is provided with a first solenoid valve; the third pipeline is communicated with the irrigation water source through a sixth pipeline, a fourth solenoid valve is provided on the sixth pipeline, and the sixth pipeline is The connection port of the pipeline and the third pipeline is located between the water outlet of the micro-nano bubble generator and the first solenoid valve, the dissolved oxygen sensor, the first solenoid valve and the fourth solenoid valve The valves are respectively connected to the first programmable controllers.

Preferably, an ecological drainage ditch is also included; the paddy field to be irrigated is communicated with the water inlet of the ecological drainage ditch through a fourth pipeline.

Preferably, the rice field to be irrigated is provided with a first water quality monitoring sensor and a first water level sensor, the first water quality monitoring sensor is connected to a second programmable controller, the first water level sensor, the water pump and the The micro-nano bubble generator is respectively connected with the third programmable controller; the fourth pipeline is provided with a second solenoid valve, and the second programmable controller and the third programmable controller are respectively connected with the The second solenoid valve is connected, and the second programmable controller and the third programmable controller are respectively connected with the first solenoid valve.

Preferably, it also includes a digestion tank, the water outlet of the ecological drainage ditch, the water inlet of the irrigation water source and the water inlet of the digestion tank are connected with a three-way solenoid valve through pipelines, and the digestion tank is provided with a three-way solenoid valve. adsorbed substances.

Preferably, a second water quality monitoring sensor and a second water level sensor are provided in the ecological drainage ditch, the second water quality monitoring sensor is connected to a fourth programmable controller, and the second water level sensor is connected to a fifth programmable controller The fourth programmable controller and the fifth programmable controller are respectively connected with the three-way solenoid valve.

Preferably, the clean water outlet of the digestion tank is also communicated with the irrigation water source through a fifth pipeline, a third water quality monitoring sensor is arranged in the digestion tank, and a third solenoid valve is arranged on the fifth pipeline , the third solenoid valve and the third water quality monitoring sensor are respectively connected with the sixth programmable controller.

Preferably, the adsorbent is zeolite.

Preferably, the air inlet of the micro-nano bubble generator is provided with an air intake quantity control valve connected to the first programmable controller.

The present invention also provides an automatic irrigation and drainage method for paddy fields based on micro-nano aeration, comprising the following steps:

(1) when the water level detected by the first water level sensor is lower than the set value, the third programmable controller turns on the water pump and the micro-nano bubble generator, and the water in the irrigation water source is pumped into the micro-nano bubble generator, The water pumped into the micro-nano bubble generator is injected into the micro-nano bubble, and the water flowing out of the micro-nano bubble generator is injected into the paddy field to be irrigated;

(2) when the water level in the described paddy field to be irrigated reaches the water storage upper limit or the water quality in the described paddy field to be irrigated does not reach the standard, stop irrigation, and simultaneously discharge the water in the described paddy field to be irrigated into the ecological drainage ditch;

(3) When the water quality in the ecological drainage ditch reaches the standard, the water in the ecological drainage ditch is discharged into the irrigation water source, and when the water quality in the ecological drainage ditch is not up to the standard, the water in the ecological drainage ditch is discharged into the irrigation water source. The water is discharged into the digestion tank; the water that reaches the standard after being digested in the digestion tank is discharged into the irrigation water source.

Preferably, when the dissolved oxygen concentration in the water flowing out of the micro-nano bubble generator does not meet the standard, firstly close the pipeline between the micro-nano bubble generator and the paddy field to be irrigated, and adjust the flow into the micro-nano bubble generator by adjusting The water flow rate of the bubble generator and the air intake of the micro-nano bubble generator are used to adjust the dissolved oxygen concentration in the water flowing out of the micro-nano bubble generator. When the oxygen concentration meets the standard, open the pipeline between the micro-nano bubble generator and the rice field to be irrigated.

The present invention has achieved the following technical effects with respect to the prior art:

The automatic irrigation and drainage system and method for paddy fields based on micro-nano aeration of the present invention can avoid the occurrence of the phenomenon that the water quality of the paddy field deteriorates and the rice growth is damaged after the wheat straw is returned to the field in the rice-wheat rotation area. The present invention is based on the micro-nano aerated rice automatic irrigation and drainage system and method. By means of micro-nano aerated irrigation, the purpose of weakening the water quality deterioration of the flooded rice field caused by returning straw to the field in the rice-wheat rotation area can be achieved, It solves the problem of non-point source pollution caused by flooded paddy fields in non-rice-wheat rotation areas. At the same time, the automatic irrigation and drainage system proposed by the present invention can realize automatic irrigation and drainage of flooded paddy fields by relying on the identification of the water level and water quality of the paddy field and the automatic control of gate valve control.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the structural representation of the paddy field automatic irrigation and drainage system based on micro-nano aeration of the present invention;

Fig. 2 is the flow chart of the paddy field automatic irrigation and drainage method based on micro-nano aeration of the present invention;

Among them: 1. Flow valve; 2. Water pump; 3. Irrigation water source; 4. Micro-nano bubble generator; 5. Air intake control valve; 6. Dissolved oxygen sensor; 7. The first programmable controller; 8. The first 1. Solenoid valve; 9. Rice fields to be irrigated; 10. First water quality monitoring sensor; 11. First water level sensor; 12. Second programmable controller; 13. Third programmable controller; 14. Second solenoid valve; 15. Ecological drainage ditch; 16. Second water quality monitoring sensor; 17. Second water level sensor; 18. Fourth programmable controller; 19. Fifth programmable controller; 20. Three-way solenoid valve; 21. Digestion tank 22, the third water quality monitoring sensor; 23, the sixth programmable controller; 24, the third solenoid valve; 25, the fourth solenoid valve.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The purpose of the present invention is to provide a kind of paddy field automatic irrigation and drainage system and method based on micro-nano aeration, in order to solve the above-mentioned problems in the prior art, to avoid the deterioration of the water quality of the paddy field after the wheat straw is returned to the field in the rice-wheat rotation area, and to cause damage to the growth of rice. occurrence of injury.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in FIGS. 1 to 2 , this embodiment provides an automatic irrigation and drainage system for paddy fields based on micro-nano aeration, including a water pump 2 , a micro-nano bubble generator 4 , an ecological drainage ditch 15 and a digestion tank 21 .

Wherein, the water inlet of the water pump 2 is communicated with the irrigation water source 3 through the first pipeline, the water outlet of the water pump 2 is communicated with the water inlet of the micro-nano bubble generator 4 through the second pipeline, and the water outlet of the micro-nano bubble generator 4 passes through The third pipeline is connected to the paddy field 9 to be irrigated; the paddy field 9 to be irrigated is connected to the water inlet of the ecological drainage ditch 15 through the fourth pipeline; the third pipeline is connected to the irrigation water source 3 through the sixth pipeline, and the sixth pipeline is provided with There is a fourth solenoid valve 25 . The water outlet of the ecological drainage ditch 15, the water inlet of the irrigation water source 3 and the water inlet of the digestion tank 21 are communicated with a three-way solenoid valve 20 through pipelines, and the digestion tank 21 is provided with adsorbents such as zeolite, which are used to digest the ecological drainage ditch. 15 of the water whose water quality exceeds the standard can achieve the purpose of reuse of farmland irrigation water.

The second pipeline is provided with a flow valve 1, the third pipeline is provided with a dissolved oxygen sensor 6, the third pipeline is provided with a first solenoid valve 8, and the connection port between the sixth pipeline and the third pipeline is located in the micro-nano bubble Between the water outlet of the generator and the first solenoid valve 8 , the dissolved oxygen sensor 6 , the first solenoid valve 8 and the fourth solenoid valve 25 are respectively connected to the first programmable controller 7 . The air inlet of the micro-nano bubble generator 4 is provided with an air intake volume control valve 5 connected to the first programmable controller 7, and the first programmable controller 7 can determine the dissolved oxygen concentration value fed back by the dissolved oxygen sensor 6. The intake air volume control valve 5 is controlled and adjusted to realize the adjustment of the intake air volume of the micro-nano bubble generator 4 .

A first water quality monitoring sensor 10 and a first water level sensor 11 are arranged in the paddy field 9 to be irrigated, the first water quality monitoring sensor 10 is connected with the second programmable controller 12, the first water level sensor 11, the water pump 2 and the micro-nano bubble generator 4 are respectively connected to the third programmable controller 13; the fourth pipeline is provided with a second solenoid valve 14, the second programmable controller 12 and the third programmable controller 13 are respectively connected to the second solenoid valve 14, and the The second programmable controller 12 and the third programmable controller 13 are respectively connected to the first solenoid valve 8 .

The ecological drainage ditch 15 is provided with a second water quality monitoring sensor 16 and a second water level sensor 17, the second water quality monitoring sensor 16 is connected to the fourth programmable controller 18, and the second water level sensor 17 is connected to the fifth programmable controller 19 , the fourth programmable controller 18 and the fifth programmable controller 19 are respectively connected with the three-way solenoid valve 20 . The second water quality monitoring sensor 16 is used to detect water quality indicators such as COD of the water in the farmland drainage ditch.

The clean water outlet of the digestion tank 21 is also communicated with the irrigation water source 3 through the fifth pipeline. The digestion tank 21 is provided with a third water quality monitoring sensor 22, and the fifth pipeline is provided with a third solenoid valve. The three water quality monitoring sensors 22 are respectively connected to the sixth programmable controller 23 .

The present embodiment also provides a method for automatic irrigation and drainage of paddy fields based on micro-nano aeration, comprising the following steps:

(1) When the water level detected by the first water level sensor 11 is lower than the set value, the third programmable controller 13 turns on the water pump 2 and the micro-nano bubble generator 4, and pumps the water in the irrigation water source 3 into the micro-nano bubble generator 4, the water pumped into the micro-nano bubble generator 4 is injected into the micro-nano bubble, and the water flowing out of the micro-nano bubble generator 4 is injected into the paddy field 9 to be irrigated; the flow valve 1 can be adjusted manually to adjust the size of the water volume; When the sensor 6 detects that the dissolved oxygen concentration in the water flowing out of the micro-nano bubble generator 4 does not meet the standard, the first programmable controller 7 will close the first solenoid valve 8 and open the fourth solenoid valve 25, so that the dissolved oxygen concentration does not meet the standard. The water flows back to the irrigation water source 3, and the first programmable controller 7 controls and adjusts the intake air volume control valve 5 according to the dissolved oxygen concentration value fed back by the dissolved oxygen sensor 6, so as to realize the intake air to the micro-nano bubble generator 4. Adjustment of the amount, so that the dissolved oxygen concentration of the water discharged from the micro-nano bubble generator 4 is adjusted to meet the standard, and when the dissolved oxygen concentration of the water flowing out of the micro-nano bubble generator 4 detected by the dissolved oxygen sensor 6 meets the standard, The first programmable controller 7 will open the first solenoid valve 8 and close the fourth solenoid valve 25 , and inject water with a dissolved oxygen concentration that meets the standard into the paddy field 9 to be irrigated.

(2) when the water level in the paddy field 9 to be irrigated reaches the water storage upper limit or the water quality in the paddy field 9 to be irrigated does not reach the standard, stop irrigation, and simultaneously the water in the paddy field 9 to be irrigated is discharged into the ecological drainage ditch 15; Concrete, If the first water quality monitoring sensor 10 detects that the water quality in the paddy field 9 to be irrigated exceeds the standard, the second programmable controller 12 will control to close the first solenoid valve 8 and open the second solenoid valve 14, so that the excess water quality in the paddy field 9 to be irrigated exceeds the standard. The water flows into the ecological drainage ditch 15; when the water level measured by the first water level sensor 11 is 0, the third programmable controller 13 will work to close the second solenoid valve 14 to stop the drainage, and at the same time the third programmable controller 13 is turned on The first solenoid valve 8 supplies water to the paddy field. When the water quality measured by the first water quality monitoring sensor 10 meets the standard, the second programmable controller 12 does not work. When the second programmable controller 12 does not work, the working standard of the third programmable controller 13 is: if the water level in the paddy field 9 to be irrigated is less than the minimum depth of the flooded water layer, the third programmable controller 13 controls to start the first programmable controller 13. A solenoid valve 8 supplies water to the paddy field 9 to be irrigated, and when the first water level sensor 11 determines that the water level is the upper limit of the paddy field flooded water layer, the third programmable controller 13 controls to close the first solenoid valve 8 to stop watering; if the paddy field 9 is to be irrigated When the water level is greater than the maximum water storage depth, that is, when the water level reaches the upper limit of water storage, the third programmable controller 13 controls to close the first solenoid valve 8 and activate the second solenoid valve 14, so that the excess water in the paddy field 9 to be irrigated is discharged. In the ecological drainage ditch 15, when the first water level sensor 11 determines that the water level is the upper limit of the paddy field flooded water layer, the third programmable controller 13 controls to close the second solenoid valve 14 to stop the drainage;

(3) When the water quality in the ecological drainage ditch 15 reaches the standard, the water in the ecological drainage ditch 15 is discharged into the irrigation water source 3, and when the water quality in the ecological drainage ditch 15 does not meet the standard, the water in the ecological drainage ditch 15 is discharged into the digestion Specifically, when the water level measured by the second water level sensor 17 does not reach the upper limit of the water level, the fifth programmable controller 19 brakes the work of the fourth programmable controller 18 (when the water level does not reach a certain water level, first Let the farmland drain into the ecological drainage ditch 15 ), when the water level measured by the second water level sensor 17 reaches the preset water level, the fifth programmable controller 19 closes the brake on the fourth programmable controller 18 . At this time, if the water quality measured by the second water quality monitoring sensor 16 exceeds the standard, the fourth programmable controller 18 controls the three-way solenoid valve 20 to open the valve connected to the digestion tank 21, so that the water in the drainage ditch flows into the digestion tank 21 for deep penetration Water purification; if the water quality in the paddy field is qualified, the fourth programmable controller 18 controls the three-way solenoid valve 20 to open the valve connected to the irrigation water source 3, so that the water that meets the standard flows into the irrigation water collection area.

(4) The water that reaches the standard after being digested in the digestion tank 21 is discharged into the irrigation water source 3; specifically, if the water quality in the digestion tank 21 measured by the third water quality monitoring sensor 22 meets the standard, the sixth programmable controller 23 controls the opening The third solenoid valve makes the water that meets the water quality requirements flow into the irrigation water source 3; if the water quality measured by the third water quality monitoring sensor 22 does not meet the standard, the sixth programmable controller 23 controls the third solenoid valve to keep the closed state until the third solenoid valve is closed. The water quality measured by the three water quality monitoring sensors 22 conforms to the standard.

The micro-nano aeration-based automatic irrigation and drainage system and method for paddy fields in this embodiment can achieve the purpose of weakening the water quality deterioration of flooded paddy fields caused by returning straw to the rice-wheat rotation area by means of micro-nano aeration irrigation, and solve the problem of The problem of non-point source pollution caused by flooded paddy fields in non-rice-wheat rotation areas. At the same time, the automatic irrigation and drainage system proposed in this embodiment can realize automatic irrigation of flooded paddy fields by relying on the identification of the water level of the paddy field and the automatic control of gate valve control. Micro-nano bubbles have the characteristics of long residence time in water, large specific surface area, strong adsorption, and good stability. They can quickly dissolve in water, increase the solubility of gases in aqueous solutions, and enrich active oxygen in water. In terms of environmental remediation Shows great potential. At present, it is mainly used in surface water purification, sewage (wastewater) treatment, soil treatment and so on. Studies have shown that micro-nano bubbles can enhance the microbial activity under anaerobic and aerobic conditions, promote the biodegradation and deposition of pollutants in water, and improve the biological purification capacity of water bodies. In addition, fine bubble aeration can treat wastewater rich in ammonia nitrogen, significantly remove COD and ammonia nitrogen in the water body, and improve water quality. At the same time, for rice fields, aerated irrigation can improve the activity of root microorganisms, optimize the oxygen environment of rice roots, promote the growth of rice roots and the absorption and utilization of nutrients, and promote its production and income.

In the description of the present invention, it should be noted that the terms "first", "second" and the like are only used for the purpose of description, and should not be construed as indicating or implying relative importance.

In this specification, specific examples are used to illustrate the principles and implementations of the present invention, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention; There will be changes in the specific implementation manner and application scope of the idea of the invention. In conclusion, the contents of this specification should not be construed as limiting the present invention.

Claims (7)

1. a paddy field automatic irrigation and drainage system based on micro-nano aeration, is characterized in that: comprise a water pump and a micro-nano bubble generator, the water inlet of the water pump is communicated with the irrigation water source by the first pipeline, and the outlet of the water pump is communicated with the irrigation water source. The water outlet is communicated with the water inlet of the micro-nano bubble generator through a second pipeline, and the water outlet of the micro-nano bubble generator is connected to the paddy field to be irrigated through a third pipeline; an oxygen sensor, the third pipeline is provided with a first solenoid valve, the dissolved oxygen sensor is closer to the micro-nano bubble generator than the first solenoid valve; the third pipeline is connected to the third pipeline through the sixth pipeline The irrigation water source is communicated with, the sixth pipeline is provided with a fourth solenoid valve, and the connection port of the sixth pipeline and the third pipeline is located at the water outlet of the micro-nano bubble generator and the first Between the solenoid valves, the dissolved oxygen sensor, the first solenoid valve and the fourth solenoid valve are respectively connected with the first programmable controller; It also includes an ecological drainage ditch; the paddy field to be irrigated is communicated with the water inlet of the ecological drainage ditch through a fourth pipeline; the paddy field to be irrigated is provided with a first water quality monitoring sensor and a first water level sensor, the first The water quality monitoring sensor is connected with the second programmable controller, the first water level sensor, the water pump and the micro-nano bubble generator are respectively connected with the third programmable controller; the fourth pipeline is provided with a second programmable controller. Solenoid valve, the second programmable controller and the third programmable controller are respectively connected with the second solenoid valve, and the second programmable controller and the third programmable controller are respectively connected with the The first solenoid valve is connected; it also includes a digestion tank, the water outlet of the ecological drainage ditch, the water inlet of the irrigation water source and the water inlet of the digestion tank are communicated with a three-way solenoid valve through pipelines, and the digestion tank is connected with a three-way solenoid valve. Adsorbent substances are arranged in the pool. 2. The paddy field automatic irrigation and drainage system based on micro-nano aeration according to claim 1, wherein the ecological drainage ditch is provided with a second water quality monitoring sensor and a second water level sensor, and the second water quality monitoring The sensor is connected with the fourth programmable controller, the second water level sensor is connected with the fifth programmable controller, and the fourth programmable controller and the fifth programmable controller are respectively connected with the three-way solenoid valve connect. 3. The paddy field automatic irrigation and drainage system based on micro-nano aeration according to claim 1 or 2, characterized in that: the clean water outlet of the digestion tank is also communicated with the irrigation water source through the fifth pipeline, so The digestion tank is provided with a third water quality monitoring sensor, the fifth pipeline is provided with a third solenoid valve, and the third solenoid valve and the third water quality monitoring sensor are respectively connected to the sixth programmable controller. 4 . The automatic irrigation and drainage system for paddy fields based on micro-nano aeration according to claim 1 , wherein the adsorbent is zeolite. 5 . 5. The paddy field automatic irrigation and drainage system based on micro-nano aeration according to claim 1, characterized in that: the air inlet of the micro-nano bubble generator is provided with an inlet connected to the first programmable controller. Air volume control valve. 6. a paddy field automatic irrigation and drainage method based on micro-nano aeration, is characterized in that, based on any one of claims 1-5 described based on the micro-nano aerated paddy field automatic irrigation and drainage system, comprising the following steps: (1) when the water level detected by the first water level sensor is lower than the set value, the third programmable controller turns on the water pump and the micro-nano bubble generator, and the water in the irrigation water source is pumped into the micro-nano bubble generator, The water pumped into the micro-nano bubble generator is injected into the micro-nano bubble, and the water flowing out of the micro-nano bubble generator is injected into the paddy field to be irrigated; (2) when the water level in the described paddy field to be irrigated reaches the water storage upper limit or the water quality in the described paddy field to be irrigated does not reach the standard, stop irrigation, and simultaneously discharge the water in the described paddy field to be irrigated into the ecological drainage ditch; (3) When the water quality in the ecological drainage ditch reaches the standard, discharge the water in the ecological drainage ditch into the irrigation water source, and when the water quality in the ecological drainage ditch does not meet the standard, drain the water in the ecological drainage ditch into the irrigation water source The water is discharged into the digestion tank; the water that reaches the standard after being digested in the digestion tank is discharged into the irrigation water source. 7. the paddy field automatic irrigation and drainage method based on micro-nano aeration according to claim 6 is characterized in that: when the dissolved oxygen concentration in the water flowing out of the micro-nano bubble generator does not meet the standard, firstly close the micro-nano bubble generator The pipeline between the bubble generator and the rice field to be irrigated is adjusted by adjusting the flow rate of the water flowing into the micro-nano bubble generator and the air intake of the micro-nano bubble generator to adjust the generation of the micro-nano bubbles flowing out When the dissolved oxygen concentration of the water flowing out of the micro-nano bubble generator meets the standard, the pipeline between the micro-nano bubble generator and the paddy field to be irrigated is opened.

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