CN106359024B - Automatic control method for narrow-row-spacing root-dividing alternative irrigation - Google Patents
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- 230000002262 irrigation Effects 0.000 title claims abstract description 52
- 238000003973 irrigation Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 153
- 239000002689 soil Substances 0.000 claims abstract description 87
- 238000009736 wetting Methods 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 4
- 230000003993 interaction Effects 0.000 abstract description 3
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- 238000002474 experimental method Methods 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 208000005156 Dehydration Diseases 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000001447 compensatory effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 244000037666 field crops Species 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000002420 orchard Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000005068 transpiration Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
- A01G25/16—Control of watering
- A01G25/167—Control by humidity of the soil itself or of devices simulating soil or of the atmosphere; Soil humidity sensors
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
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Abstract
The invention discloses an automatic control method for narrow-row-spacing root-divided alternative irrigation, wherein a group of water delivery capillary pipes with electromagnetic valves are respectively arranged at two sides of a crop row, soil moisture sensors are respectively embedded below the two groups of water delivery capillary pipes, and when any one group of water delivery capillary pipes delivers water, the soil moisture below the other group of water delivery capillary pipes is affected. According to the invention, the horizontal wetting radiuses of capillary tubes on two sides of the crop row are mutually influenced, and high-efficiency and highly-automatic root-divided alternative irrigation is realized by constructing a corresponding automatic control system according to the size and the interaction relation of the water content of soil on two sides of the crop row.
Description
Technical Field
The invention relates to the technical field of water-saving irrigation, in particular to a narrow-row-spacing root-division alternative irrigation technology.
Background
With the increasing shortage of fresh water resources and the increasing water demand, the development of water-saving agriculture becomes an important strategy for realizing sustainable development under the condition of water resource constraint in countries around the world. The average occupied amount of water resources in China is only 2300 cubic meters, which is about 1/4 in the average level of people in the world, and the water resources are discharged at the 121 th position in the world, and are one of 13 water-poor countries in the world, meanwhile, agriculture is also a large consumer, and the water consumption for agricultural irrigation accounts for about 65% of the total water supply amount in the country. However, the contradiction between insufficient water resources and serious waste and low utilization efficiency in agricultural production is prominent, and the development of water-saving agriculture is more urgent. In view of the restriction of the input level of farmland and water conservancy in China at present, the improvement of ground irrigation is the mainstream of water-saving irrigation for a long time, but in terms of water-saving potential, biological water saving is the key point and the focus of research on future water-saving agriculture, so that a comprehensive water-saving technology integrating ground improvement and biological water saving is the key research direction of water-saving agriculture in China.
In the early 60-70 s of the 20 th century, foreign researchers have tried to apply alternate-row irrigation and furrow-row irrigation techniques to crops, and systematic studies on the water utilization efficiency and evapotranspiration characteristics of the crops are carried out. In 1996, on the basis of indoor potting, plot experiments and field application experiments, the Kangshaozhong et al systematically provides a crop root system partition alternative irrigation technology for the first time, and clarifies the concept, theoretical basis and implementation mode. In 1997, Kanshozhong and the like propose four application modes suitable for the partitioned alternative irrigation of the root system of the fruit tree, namely an alternative furrow irrigation system, a movable alternative drip irrigation system, an annular automatic control type alternative drip irrigation system and an alternative infiltrating irrigation system. In combination with the actual irrigation of orchards in China, some scholars also put forward the development of alternate hole irrigation (dish irrigation) technology. In addition, for the thin planting field crops, the alternative water supply of different root intervals can be realized on the premise of integrating and applying the ridge culture and furrow irrigation technology.
The research of the controlled root-divided alternative irrigation as a brand-new water-saving new thought and new technology for the farmland is still in the initial stage at present, and although the research has proved to have the possibility of theory and implementation and huge water-saving potential, certain problems still exist in the specific implementation process. For example, the cost of facilities and equipment such as water distribution pipelines is increased beyond that of conventional irrigation, so that the economic benefit is reduced; the quantification and operable level of comprehensive alternate irrigation considering the soil moisture movement process, the root distribution condition and the like is lower; the root-dividing alternative irrigation control system is low in automation level, high in cost and complex in structure, and is not beneficial to large-area application and popularization.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an automatic control method for narrow-row-spacing root-division alternative irrigation, which enables horizontal wetting radiuses of capillary tubes on two sides of a crop row to have mutual influence, and realizes high-efficiency and highly-automatic narrow-row-spacing root-division alternative irrigation by constructing a corresponding automatic control system according to the size and the interaction relation of soil water content on two sides of the crop row.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
A narrow row spacing root-dividing alternative irrigation automatic control method is characterized in that a group of water delivery capillary pipes with electromagnetic valves are respectively arranged on two sides of a crop row, soil moisture sensors are respectively embedded below the two groups of water delivery capillary pipes, and when any one group of water delivery capillary pipes delivers water, the soil moisture below the other group of water delivery capillary pipes is affected.
As a preferred technical scheme of the invention, a group of central intelligent controllers are arranged, the soil moisture sensor is arranged at the signal input end of the central intelligent controller, and the electromagnetic valve is arranged at the signal output end of the central intelligent controller; at this time, the following two conditions are based:
firstly, the soil water contents of any two points of farmland soil at the same moment cannot be completely the same;
secondly, when any group of water delivery capillary pipes delivers water, the soil humidity below the other group of water delivery capillary pipes is affected;
two sets of water delivery capillary are realized irrigating to crop row both sides respectively in proper order through central intelligent control's control, and the B side water delivery capillary is closed when realizing A side water delivery capillary is irrigated automatically promptly, and both sides water delivery capillary all closes after reaching certain soil humidity requirement, and B side water delivery capillary is irrigated and A side water delivery capillary closes when irrigating next time, and both sides water delivery capillary all closes after reaching certain soil humidity requirement, automatic cycle.
As a preferred technical solution of the present invention, the central intelligent controller is powered by a DC24v power supply, and is provided with a power output channel, at least 2 voltage signal input channels, and at least 2 relay alarm output channels, wherein:
the power supply output channel is connected with the soil moisture sensor and provides DC12v power supply for the soil moisture sensor;
the 2-path voltage input channel is respectively in communication connection with the soil moisture sensors on the two sides of the crop row, respectively receives 2-path voltage signals sent back by the soil moisture sensors on the two sides of the crop row according to the soil humidity state, then compares the 2-path voltage signals with a preset 2-path alarm voltage value related to the soil field water holding capacity, and the central intelligent controller respectively controls the 2-path relay alarm output channel to be opened and closed according to the comparison result;
the 2-path relay alarm output channel is respectively in communication connection with electromagnetic valves on water delivery capillary pipes on two sides of the crop row;
realize two sets of water delivery capillary respectively irrigating to crop row both sides in proper order through above-mentioned setting, the B side water delivery capillary is closed when realizing the irrigation of A side water delivery capillary automatically promptly, and both sides water delivery capillary is all closed after reaching certain soil humidity requirement, and the B side water delivery capillary is irrigated and A side water delivery capillary is closed when irrigating next time, reaches both sides water delivery capillary and all closes, automatic cycle after certain soil humidity requires.
As a preferred technical scheme of the invention, the preset value of the 2-path alarm voltage value related to the field water capacity of the soil is based on the output value of the soil moisture sensor corresponding to 50-80% of the field water capacity, when the actual output value of the soil moisture sensor is lower than the preset value, the central intelligent controller controls the corresponding relay alarm output channel to be closed, and the corresponding electromagnetic valve is opened to start irrigation; otherwise the solenoid valve is closed.
As a preferred technical scheme of the present invention, the soil moisture sensor is a voltage type sensor, is buried deep in a root layer of a crop, and works under a condition of power supply of a DC12V power supply to output a 0-5V DC voltage signal according to the water content of soil, and the relationship between the voltage signal V of the water content Q of soil is as follows: q = V/5.
As a preferable technical scheme of the invention, the electromagnetic valve is a normally closed electromagnetic valve, the power supply is direct current DC12v, and the electromagnetic valve is opened when electrified and closed when power is off.
As a preferred technical scheme of the invention, the water delivery capillary is arranged on a pressure water delivery pipeline, the pressure water delivery pipeline comprises a main pipe and a plurality of branch pipes, and valves are respectively arranged on the main pipe and the branch pipes.
As a preferred technical scheme of the invention, two groups of water delivery capillary pipes at two sides of a crop row are arranged on the same branch pipe through a bypass, electromagnetic valves are respectively arranged at the heads of the water delivery capillary pipes,
as a preferred technical scheme of the invention, two groups of water delivery capillary pipes on two sides of a crop row are respectively arranged on two parallel branch pipes, and the heads of the branch pipes are provided with electromagnetic valves.
As a preferred technical scheme of the invention, the branch pipe adopts a PE pipeline with the diameter of 50mm, the water delivery capillary adopts a PE drip irrigation belt with the diameter of 20mm, the distance between drippers is 30cm, the horizontal wetting radius is 50cm, and the distance between two groups of water delivery capillary at two sides of a crop row is 60cm, so that the increase of the water content of soil at the other side can be ensured when the water delivery capillary at one side is used for irrigating water.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
according to the invention, the horizontal wetting radiuses of capillary tubes on two sides of the crop row are mutually influenced, and high-efficiency and highly-automatic root-divided alternative irrigation is realized by constructing a corresponding automatic control system according to the size and the interaction relation of the water content of soil on two sides of the crop row. Specifically, the invention sets and constructs a system through a simple and ingenious principle, and is based on the two points that the soil water content of any two points of farmland soil can not be completely the same at the same time, and that any group of water delivery capillary pipes all affect the soil humidity below the other group of water delivery capillary pipes when delivering water, and the two points are efficiently and highly automatically realized by using a plurality of simple groups of sensors, electromagnetic valves and simple controllers, so that the two groups of water delivery capillary pipes are respectively and sequentially irrigated to the two sides of a crop row, namely, the water delivery capillary pipe at the B side is closed when the water delivery capillary pipe at the A side is irrigated, the water delivery capillary pipes at the two sides are closed after a certain soil humidity requirement is met, the water delivery capillary pipes at the B side are irrigated and the water delivery capillary pipe at the A side is closed when the next irrigation is carried out, and the water delivery capillary pipes at the two sides are closed after a certain soil humidity requirement is met, and the automatic circulation is realized.
Meanwhile, the method of the invention also integrates a root-dividing water-saving irrigation technology, keeps the soil of the active layer of the crop root system dry in a certain area of the horizontal (vertical) section, simultaneously leads the root system to alternately appear in the dry area of the horizontal (vertical) section, and always keeps a part of the crop root system to grow in a dry or drier soil environment, thus the control effect has extremely high water-saving and yield-increasing effects; the reason is that firstly, the crop root system in the dry area can generate a water stress signal to be transmitted to the leaf stomata, so that the leaf stomata are effectively adjusted to be closed, transpiration is controlled, and the crop root system in the wet area absorbs water from soil to meet the requirement of minimum life of crops, so that the damage to the crops is kept within a critical limit; and secondly, the surface layer of the soil is always intermittently positioned in a drying area during root-divided alternate irrigation, so that invalid evaporation loss among plants can be reduced, the air permeability of the soil can be improved, the compensatory growth of crop roots can be promoted, the functions of the roots can be enhanced, and the utilization rate of the roots to soil moisture and nutrients can be improved.
In conclusion, the invention carries out research on the automatic control system and method for the narrow-row-spacing root-divided alternative irrigation based on the strategic demands of agricultural modernization and water resource safety and the problem of low automation level of agricultural water extensive and water-saving irrigation, integrates innovative modern sensor technology and intelligent control technology, realizes the automatic control of the narrow-row-spacing root-divided alternative irrigation, and provides a new efficient and practical technical means for the automation of the water-saving irrigation.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention, in which A, B two groups of capillaries are installed on the same branch pipe, and the solenoid valve is installed at the head of the capillary.
FIG. 2 is a schematic diagram of another embodiment of the present invention, in which A, B two groups of capillaries are respectively installed on two parallel branch pipes, and solenoid valves are installed at the heads of the branch pipes.
In the figure: the system comprises a central intelligent controller (1), branch pipes (2), a water delivery capillary pipe (3), an electromagnetic valve (4) and a soil moisture sensor (5).
Detailed Description
The following embodiments are given by the inventor, it should be noted that these embodiments are all preferable examples of the present invention, the present invention is not limited to these embodiments, and those skilled in the art can make equivalent substitutions and additions to the technical features of the present invention according to the scheme disclosed by the present invention, and all fall into the protection scope of the present invention.
Example 1 piping System
The branch pipe adopts a PE pipeline with phi 50mm, the capillary adopts a PE drip irrigation belt with phi 20mm, the distance between drippers is 30cm, the horizontal wetting radius is 50cm, and the capillary is connected with the branch pipe through a bypass. Lay a capillary respectively in the left and right sides of every row of crop, the capillary interval is 60cm, can cause the increase of opposite side soil humidity (water content) when guaranteeing one of them side capillary to water, and divide into A, B two sets according to controlling, figure 1 has given A, B two sets of capillaries and has installed the structural sketch map on same branch pipe to install the solenoid valve in the capillary prelude, the solenoid valve is the solenoid valve of normal close formula, and the power supply is direct current DC12v, and the circular telegram is opened promptly, cuts off the power supply and is closed. FIG. 2 shows A, B two groups of capillaries are respectively installed on two parallel branch pipes, and electromagnetic valves are installed at the heads of the branch pipes.
Example 2 automatic control System
A row of crops is selected, and soil moisture sensors-1 and-2 are respectively arranged on the left side and the right side of the crop row, namely near the two capillary tubes. The soil moisture sensor is a voltage type sensor, namely under the condition of power supply of a direct current DC12v power supply, a 0-5v direct current voltage signal is output according to the soil humidity (water content). The relationship of the soil moisture content (Q) voltage signal (v) is: q = V/5. The power supply is provided by a power supply output channel of the central intelligent controller, 0-5v direct current voltage signals are transmitted to the central intelligent controller through a voltage input channel and are compared with a soil humidity (water content) alarm lower limit value, and the soil humidity (water content) alarm lower limit value is set to be 65% of the field water capacity.
Example 3 automated implementation of narrow row spacing rooted alternate irrigation.
First, it is clear that the objectives of this study are: under the condition of narrow row spacing, two groups of water delivery capillary pipes are efficiently and highly automatically realized to irrigate to the two sides of a crop row in sequence respectively, namely, the water delivery capillary pipe at the B side is closed when the water delivery capillary pipe at the A side is irrigated, the water delivery capillary pipes at the two sides are closed after a certain soil humidity requirement is met, the water delivery capillary pipes at the B side are irrigated and the water delivery capillary pipes at the A side are closed when the water delivery capillary pipe at the B side is irrigated next time, and the water delivery capillary pipes at the two sides are closed and automatically circulate after a certain soil humidity requirement is met.
For this reason, we creatively propose the following two points as the basis and the starting point for realizing the functions of the system: firstly, the soil water contents of any two points of farmland soil can not be completely the same at the same time, and secondly, when any one group of water conveying capillary pipes conveys water, the soil humidity below the other group of water conveying capillary pipes is affected.
Specifically, the soil humidity (water content) of any two points of farmland soil cannot be completely the same, and more or less differences exist, so that the numerical value of one soil moisture sensor-1 is firstly reduced to the alarm lower limit value (65% of the field water capacity) of the central intelligent controller, the first alarm output channel is driven to be firstly closed, then the corresponding electromagnetic valve A is opened, the capillary tubes of the group A are filled with water, the distance between the two groups of capillary tubes A, B is close enough, the horizontal wetting radius is influenced mutually, and as a result, the numerical value of the other soil moisture sensor-2 is not reduced any more but is increased, namely the second alarm output channel is not closed any more, and the electromagnetic valve B is not opened any more until the water filling process is finished (the field water capacity). Then, because of the difference of the positions of the two soil moisture sensors-1 and-2, the soil humidity (water content) near the capillary tube without irrigation is lower, in the later stage of the farmland evapotranspiration process, the numerical value of the soil moisture sensor-2 is firstly reduced to the alarm lower limit value (65 percent of the field water capacity) of the central intelligent controller, thereby driving the second alarm output channel to be closed first, then opening the corresponding electromagnetic valve B, starting water filling of the group B capillary tubes, and also because the distance between the A, B two groups of capillary tubes is close enough, the horizontal wetting radiuses have mutual influence, as a result, the value of the other soil moisture sensor-1 is not decreased, but rises, namely the first alarm output channel is not closed any more, and the electromagnetic valve A is not opened any more until the water filling process is finished. And the automatic control process of root-dividing alternate irrigation under the condition of narrow row spacing is realized through sequential circulation.
In conclusion, the invention realizes the originally set target by simple and ingenious principle setting and system construction and by means of very simple groups of sensors, electromagnetic valves and simple controllers, and realizes that two groups of water delivery capillary pipes respectively irrigate to the two sides of the crop row in sequence with high efficiency and high automation.
The above description is only presented as an enabling solution for the present invention and should not be taken as a sole limitation on the solution itself.
Claims (3)
1. A narrow row spacing root-divided alternative irrigation automatic control method is used for narrow row spacing crop irrigation, the narrow row spacing means that two groups of water delivery capillary tubes are arranged on two sides of a plant, when any group of water delivery capillary tubes (3) delivers water, soil humidity below the other group of water delivery capillary tubes (3) is affected, wherein: a group of water delivery capillary tubes (3) with electromagnetic valves (4) are respectively arranged on two sides of a crop row, soil moisture sensors (5) are respectively embedded below the two groups of water delivery capillary tubes (3), and when any one group of water delivery capillary tubes (3) delivers water, the soil humidity below the other group of water delivery capillary tubes (3) is affected;
arranging a group of central intelligent controllers (1), arranging the soil moisture sensors (5) at the signal input ends of the central intelligent controllers (1), and arranging the electromagnetic valves (4) at the signal output ends of the central intelligent controllers (1); at this time, the following two conditions are based:
firstly, the soil water contents of any two points of farmland soil at the same time cannot be completely the same;
secondly, when any one group of water delivery capillary pipes (3) delivers water, the soil humidity below the other group of water delivery capillary pipes (3) is affected;
the two groups of water delivery capillary tubes (3) are respectively and sequentially irrigated to the two sides of a crop row through the control of the central intelligent controller (1), namely, the water delivery capillary tubes (3) on the B side are closed when the water delivery capillary tubes (3) on the A side are irrigated automatically, the water delivery capillary tubes (3) on the two sides are closed after a certain soil humidity requirement is met, the water delivery capillary tubes (3) on the B side are irrigated and the water delivery capillary tubes (3) on the A side are closed when the water delivery capillary tubes on the B side are irrigated next time, the water delivery capillary tubes (3) on the two sides are closed after a certain soil humidity requirement is met, and the water delivery capillary tubes on the two sides are automatically circulated;
the central intelligent controller is powered by a direct current DC24v power supply, and is provided with a power output channel, at least 2 voltage signal input channels and at least 2 relay alarm output channels, wherein:
the power supply output channel is connected with the soil moisture sensor (5) and provides DC12v power supply for the soil moisture sensor;
the 2-path voltage input channel is respectively in communication connection with the soil moisture sensors (5) on two sides of the crop row, respectively receives 2-path voltage signals sent back by the soil moisture sensors (5) on two sides of the crop row according to the soil humidity state, then respectively compares the 2-path voltage signals with a preset 2-path alarm voltage value related to the soil field water holding capacity, and the central intelligent controller (1) respectively controls the opening and closing of the 2-path relay alarm output channel according to the comparison result;
the 2-path relay alarm output channel is respectively in communication connection with the electromagnetic valves (4) on the water delivery capillary pipes (3) at the two sides of the crop row;
the two groups of water delivery capillary tubes (3) are respectively and sequentially irrigated to the two sides of the crop row through the arrangement, namely, the water delivery capillary tubes (3) on the B side are closed when the water delivery capillary tubes (3) on the A side are irrigated, the water delivery capillary tubes (3) on the two sides are closed after certain soil humidity requirements are met, the water delivery capillary tubes (3) on the B side are irrigated and the water delivery capillary tubes (3) on the A side are closed when the water delivery capillary tubes on the B side are irrigated next time, the water delivery capillary tubes (3) on the two sides are closed after certain soil humidity requirements are met, and the water delivery capillary tubes on the two sides are automatically circulated;
the preset value of the 2-path alarm voltage value related to the field water capacity of the soil is based on the output value of the corresponding soil moisture sensor (5) when the field water capacity is 65%, when the actual output value of the soil moisture sensor (5) is lower than the preset value, the central intelligent controller (1) controls the corresponding relay alarm output channel to be closed, and opens the corresponding electromagnetic valve (4) to start irrigation; otherwise, the electromagnetic valve (4) is closed;
the water delivery capillary (3) is arranged on a pressure water delivery pipeline, the pressure water delivery pipeline comprises a main pipe and a plurality of branch pipes (2), and valves are respectively arranged on the main pipe and the branch pipes;
the electromagnetic valve (4) is a normally closed electromagnetic valve, supplies power to DC12v, and is opened when electrified and closed when power is off;
two groups of water delivery capillary tubes (3) at two sides of the crop row are arranged on the same branch tube (2) through a bypass, and electromagnetic valves (4) are respectively arranged at the head parts of the water delivery capillary tubes (3);
the branch pipes (2) adopt PE pipelines with the diameter of 50mm, the water conveying capillary pipes (3) adopt PE drip irrigation belts with the diameter of 20mm, the distance between drippers is 30cm, the horizontal wetting radius is 50cm, the distance between two groups of water conveying capillary pipes (3) at two sides of a crop row is 60cm, and the increase of the water content of soil at the other side can be ensured when the water conveying capillary pipe (3) at one side is irrigated;
the irrigation process comprises:
when the soil on the side A falls to 65% of the field water capacity, the electromagnetic valve A is opened, the group A capillary pipes start to irrigate water until the irrigation process is finished, and the electromagnetic valve B is not opened during the period; and then, the soil on the side B firstly falls to 65% of the field capacity, the second alarm output channel is driven to be closed firstly, the corresponding electromagnetic valve B is opened immediately, the group B of capillary tubes start to irrigate until the irrigation process is finished, and the electromagnetic valve A is not opened during the period.
2. The automatic control method for narrow row spacing root-divided alternative irrigation according to claim 1, characterized in that: soil moisture sensor (5) are voltage type sensor, bury deeply in the crop root system layer, and it works under direct current DC12V power supply condition, and according to 0-5V direct current voltage signal of the big or small output of soil water content, soil water content Q voltage signal V's relation is: q = V/5.
3. The automatic control method for narrow row spacing root-divided alternative irrigation according to claim 1, characterized in that: two groups of water delivery capillary tubes (3) at two sides of the crop row are respectively arranged on two parallel branch tubes (2), and the heads of the branch tubes are provided with electromagnetic valves (4).
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| CN114902946A (en) * | 2016-09-22 | 2022-08-16 | 中国科学院遗传与发育生物学研究所农业资源研究中心 | Automatic alternate circulating irrigation control system and application thereof |
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| CN110913686B (en) * | 2017-07-20 | 2022-08-26 | 耐特菲姆有限公司 | Irrigation system and method |
| CN109076925B (en) * | 2018-09-27 | 2023-12-01 | 扬州大学 | Precise control system and method for ridge culture root-dividing alternate drip irrigation |
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| CN114902946B (en) | 2023-12-26 |
| CN114902946A (en) | 2022-08-16 |
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