CN208239445U - NO_3-- N Leaching measures system - Google Patents

Abstract

The utility model relates to a soil nitrate nitrogen leaching measurement system, which has a soil nitrate nitrogen leaching collection device. The soil nitrate nitrogen leaching collection device includes a ceramic suction cup, a solution collection bottle, a vacuum pump, a water suction pipe, an air release pipe and a vacuum pump. The suction pipe, the ceramic suction cup and the solution collection bottle have their own caps respectively, and a plug is provided at one end of the vent pipe, and the other end of the vent pipe and one end of the water suction pipe are inserted into the ceramic suction cup through the cap of the ceramic cup respectively. The inside of the cup; the other end of the water suction tube and one end of the vacuum suction tube are respectively inserted into the solution collection bottle through the cover of the solution collection bottle; the other end of the vacuum suction tube is connected to the pump gas port of the vacuum pump. The utility model can collect the soil leaching solution at a certain depth, obtain the content of nitrate nitrogen in the soil solution at this depth, and then calculate the leaching amount of nitrate nitrogen in combination with the leaching loss of soil water. The soil disturbance is small, easy to operate, convenient and quick.

Description

Soil nitrate nitrogen leaching measurement system

technical field

The utility model relates to the technical field of soil monitoring, in particular to a soil nitrate nitrogen leaching measurement system.

Background technique

At present, my country's livestock and poultry breeding industry is developing rapidly from decentralized breeding to intensive and large-scale development, resulting in an annual production of about 3.8 billion tons of breeding manure, including 13.5 million tons of nitrogen nutrients and 5.1 million tons of phosphorus nutrients, which are equivalent to Of the 27% of my country's annual output of chemical fertilizers, 40% have not been effectively used so far. These unused, especially breeding wastewater, have been discharged at will, becoming the largest non-point source of pollution, and the ecological environment has become increasingly prominent. After treatment, aquaculture wastewater can be turned into aquaculture fertilizer water, which is rich in organic matter, nitrogen, phosphorus and other nutrients. Applying it to farmland is an important way to reduce the discharge of nitrogen, phosphorus and other nutrients in fertilizer water to pollute water bodies.

The vertical movement of water is the key driving force for the leaching loss of soil nutrients. Soils distributed in dry farmland in North China are prone to nitrification; nitrogen in the soil mainly exists in the form of nitrate nitrogen, which is easily lost through leaching. , which brings great risks to groundwater; water is the carrier of nitrate nitrogen in the soil, water and nitrogen in the breeding fertilizer water are coupled together, and the nitrogen and water in it restrict each other and promote each other. Monitor the leaching loss of soil nitrogen to avoid excessive nitrate nitrogen leaching from fertilizer water into groundwater.

Nitrate-nitrogen is the most active form of nitrogen in the process of soil nitrogen migration and transformation. When rainfall and irrigation exceed the saturated water capacity of the field, nitrate-nitrogen will be leached downward with water.

At present, to study the impact of nitrate nitrogen leaching in soil on the environmental pollution load, soil leaching is generally collected by using soil column simulation, infiltration tanks, leaching trays and other devices, and then the collected soil leaching is measured for volume and concentration. The leaching amount of nitrate nitrogen is calculated by combining the amount of soil water leaching loss. However, the above-mentioned soil column simulation, infiltration tank, leaching plate and other devices have a large disturbance to the soil and require a large amount of manpower. , complex operation and other shortcomings.

Utility model content

The utility model is proposed in view of the above problems, and its purpose is to provide a soil nitrate nitrogen leaching measurement system.

The utility model can collect the soil leaching solution at a certain depth, obtain the content of nitrate nitrogen in the soil solution at this depth, and then calculate the leaching amount of nitrate nitrogen in combination with the leaching loss of soil water. The soil disturbance is small, easy to operate, convenient and quick.

Adopt following technical scheme for realizing the purpose of the utility model.

The utility model of technical scheme 1 is a soil nitrate nitrogen leaching measurement system, which has a soil nitrate nitrogen leaching collection device.

The soil nitrate nitrogen leaching collection device includes a ceramic suction cup, a solution collection bottle, a vacuum pump, a water suction pipe, an air discharge pipe and a vacuum suction pipe.

The ceramic suction cup and the solution collection bottle respectively have their own caps.

One end of the air release pipe is provided with a pipe plug, and the other end of the air release pipe and one end of the water suction pipe pass through the cover of the ceramic suction cup and are inserted into the inside of the ceramic suction cup; The other end of the tube and one end of the vacuum tube are respectively inserted into the solution collection bottle through the cover of the solution collection bottle; the other end of the vacuum tube is connected to the pump port of the vacuum pump.

In addition, in the soil nitrate nitrogen leaching measurement system of the technical scheme 2, in the soil nitrate nitrogen leaching measurement system of the technical scheme 1, the soil nitrate nitrogen leaching measurement system further includes a soil water potential detection device.

The soil water potential detection device includes a soil water potential sensor, a cable, a metal plug and a reading meter connected in sequence, the reading meter has a display screen, and the reading meter can convert the water potential data sensed by the soil water potential sensor into digital Information is displayed on the display screen.

In addition, in the soil nitrate nitrogen leaching measurement system of technical scheme 3, in the soil nitrate nitrogen leaching measurement system of technical scheme 2, the reading meter has one, and the soil water potential sensor has a first soil water potential sensor and a second soil water potential sensor. Two soil water potential sensors, the cable has a first cable and a second cable, and the metal plug has a first metal plug and a second metal plug.

The first soil water potential sensor, the first cable, and the first metal plug are sequentially connected to the reading meter; the second soil water potential sensor, the second cable, and the second metal plug After connecting sequentially, connect with the reading table.

In addition, in the soil nitrate nitrogen leaching measurement system of technical scheme 4, in the soil nitrate nitrogen leaching measurement system of technical scheme 1, two bushings are inserted on the cover of the ceramic suction cup.

The other end of the air discharge pipe is inserted into the inside of the ceramic suction cup through one of the sleeves through the cover of the ceramic suction cup; one end of the water suction pipe is passed through the other end of the sleeve The cover of the ceramic suction cup is inserted into the interior of the ceramic suction cup.

In addition, in the soil nitrate nitrogen leaching measurement system of technical scheme 5, in the soil nitrate nitrogen leaching measurement system of technical scheme 4, the casing is a stainless steel casing.

In addition, in the soil nitrate nitrogen leaching measurement system of technical scheme 6, in the soil nitrate nitrogen leaching measurement system of technical scheme 1, two casings are inserted on the cover of the solution collection bottle.

The other end of the suction pipe is inserted into the inside of the solution collection bottle through one of the sleeves through the cover of the solution collection bottle; one end of the vacuum pumping tube passes through the other sleeve The cap of the solution collection bottle is inserted into the inside of the solution collection bottle.

In addition, in the soil nitrate nitrogen leaching measurement system of the technical scheme 7, in the soil nitrate nitrogen leaching measurement system of the technical scheme 6, the casing is a stainless steel casing.

In addition, in the soil nitrate nitrogen leaching measurement system of technical scheme 8, in the soil nitrate nitrogen leaching measurement system of technical scheme 1, the closure of the ceramic suction cup and/or the closure of the solution collection bottle are made of Made of plexiglass.

In addition, in the soil nitrate nitrogen leaching measurement system of technical scheme 9, in the soil nitrate nitrogen leaching measurement system of technical scheme 1, the pipe plug is a stainless steel nail.

In addition, in the soil nitrate nitrogen leaching measurement system of technical scheme 10, in the soil nitrate nitrogen leaching measurement system of technical scheme 1, the water suction pipe, the air release pipe and the vacuum suction pipe are polyethylene soft Tube.

Compared with the prior art, the utility model can produce the following beneficial effects by adopting the above technical solution.

At present, to study the impact of nitrate nitrogen leaching in soil on the environmental pollution load, soil leaching is generally collected by using soil column simulation, infiltration tanks, leaching trays and other devices, and then the collected soil leaching is measured for volume and concentration. The leaching amount of nitrate nitrogen is calculated by combining the amount of soil water leaching loss. However, the above-mentioned soil column simulation, infiltration tank, leaching plate and other devices have a large disturbance to the soil and require a large amount of manpower. , complex operation and other shortcomings.

In contrast, according to the utility model of technical scheme 1, a soil nitrate nitrogen leaching measurement system is provided, which has a soil nitrate nitrogen leaching collection device.

The soil nitrate nitrogen leaching collection device includes a ceramic suction cup, a solution collection bottle, a vacuum pump, a water suction pipe, an air discharge pipe and a vacuum suction pipe.

Ceramic suction cups and solution collection bottles each have their own closures.

One end of the air discharge pipe is provided with a pipe plug, and the other end of the air discharge pipe and one end of the water suction pipe are respectively inserted into the ceramic suction cup through the cover of the ceramic suction cup; the other end of the water suction pipe and one end of the vacuum suction pipe are respectively inserted into the Insert the cap of the solution collection bottle into the solution collection bottle; the other end of the vacuum pumping tube is connected to the pump port of the vacuum pump.

When in use, drill a hole through the soil, bury the ceramic suction cup into the soil at a certain depth, collect the soil solution at this depth through the ceramic suction cup for soil solution sampling, and then measure the nitrate nitrogen in the collected soil solution according to the obtained sample Concentration.

Specifically, when sampling, a vacuum pump is used to pump air, and the solution collection bottle and the ceramic suction cup are pumped into a negative pressure. The pressure is between -40kPa and -80kPa. The tube enters the solution collection bottle; after the sample is taken, unplug the pipe plug on the vent tube to let the air enter the ceramic suction cup, and discharge all the solution in the ceramic suction cup into the solution collection bottle to ensure that it is the same as the next solution. Do not mix.

The utility model can collect the soil leaching solution at a certain depth, obtain the content of nitrate nitrogen in the soil solution at this depth, and then calculate the leaching amount of nitrate nitrogen in combination with the leaching loss of soil water, and the utility model only The soil needs to be drilled and drilled, and the drilled holes can accommodate ceramic suction cups. It has the characteristics of small disturbance to the soil, easy operation, and convenience.

According to the utility model of the technical scheme 2, the soil nitrate nitrogen leaching measurement system also includes a soil water potential detection device.

The soil water potential detection device includes a soil water potential sensor, a cable, a metal plug and a readout meter connected in sequence. The readout meter has a display screen, and the readout meter can convert water potential data sensed by the soil water potential sensor into digital information and display it on the display screen.

According to the above structure, the soil water potential sensor can be used to measure the water potential of the soil at 10cm above and below the buried layer of ceramic suction cups, so as to calculate the water flux of the buried layer of ceramic suction cups. According to the water leaching curve, a certain The amount of soil moisture leaching at the soil level within the time period, combined with the nitrate nitrogen content in the soil solution at the soil level calculated based on the soil solution collected by the soil nitrate nitrogen leaching collection device, the soil level leaching amount of nitrate nitrogen.

It should be noted that, in the above structure, the metal plug and the reading meter can be fixedly connected, or can be plugged and detachably connected.

According to the utility model of technical scheme 3, the reading meter has one, the soil water potential sensor has a first soil water potential sensor and a second soil water potential sensor, the cable has a first cable and a second cable, and the metal plug has a first metal plug and a second metal plug. plug.

The first soil water potential sensor, the first cable and the first metal plug are connected in sequence and then connected to the reading meter; the second soil water potential sensor, the second cable and the second metal plug are connected in sequence and then connected to the reading meter.

According to the above structure, the water potential of the upper layer and the lower layer of the ceramic suction cup buried layer can be measured simultaneously through the same reading meter, which avoids errors caused by divided measurements, and can simplify the measurement steps and save manpower.

According to the utility model of technical solution 4, two bushings are inserted on the cover of the ceramic suction cup.

The other end of the air discharge tube is inserted into the ceramic suction cup through the cover of the ceramic suction cup through one of the sleeves; one end of the suction tube is inserted into the inside of the ceramic suction cup through the cover of the ceramic suction cup through the other sleeve .

According to the above structure, therefore, it can be ensured that the parts of the air release pipe and the water suction pipe which communicate with the cover of the ceramic suction cup are not bent, thereby ensuring the smooth progress of the air release process and the water absorption process.

According to the utility model of the technical solution 5, the sleeve is a stainless steel sleeve, thereby ensuring that the sleeve has high hardness and is not easy to be damaged, and ensures that the sleeve has a long service life.

According to the utility model of technical solution 6, two sleeve tubes are inserted on the cover of the solution collection bottle.

The other end of the suction tube is inserted into the solution collection bottle through the cover of the solution collection bottle through one of the sleeves; one end of the vacuum suction tube is inserted into the solution collection bottle through the cover of the solution collection bottle through the other sleeve. internal.

According to the above structure, thus, it can be ensured that the parts of the water suction pipe and the vacuum suction pipe which communicate with the cover of the solution collection bottle are not bent, thereby ensuring the smooth progress of the water suction process and the suction process.

According to the utility model of the technical solution 7, the sleeve is a stainless steel sleeve, thereby ensuring that the sleeve has high hardness and is not easily damaged, and ensures that the sleeve has a long service life.

According to the utility model of the technical scheme 8, the cover of the ceramic suction cup and/or the cover of the solution collection bottle are made of plexiglass, thereby, the cover can be avoided from being corroded in the soil, thereby affecting the collected samples and their surroundings. The soil is polluted, which has the advantages of ensuring sample quality and being environmentally friendly.

According to the utility model of technical solution 9, the pipe plug is a stainless steel nail, so that the pipe plug can be plugged and pulled out by using the nail head of the stainless steel nail, which can not only achieve a good sealing effect, but also be easy to plug and pull, and can simplify the operation steps.

According to the utility model of technical solution 10, the water suction pipe, the air discharge pipe and the vacuum suction pipe are respectively polyethylene hoses, wherein polyethylene is non-toxic, environmentally friendly, and has low water absorption, and can be used without polluting the sample and the surrounding soil. In addition, its soft properties enable each pipeline to be bent slightly according to actual needs without damage, ensuring smooth sample collection.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the following descriptions The accompanying drawings are some implementations of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative work.

Fig. 1 is a schematic diagram showing the overall structure of a specific embodiment of the soil nitrate nitrogen leaching measurement system provided by the utility model.

Reference signs: 1-ceramic suction cup; 2-solution collection bottle; 3-vacuum pump; 4-suction pipe; Soil water potential sensor; 82-second soil water potential sensor; 91-first cable; 92-second cable; 101-first metal plug; 102-second metal plug.

Detailed ways

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "inner" and "outer" are based on the orientations or positions shown in the drawings The relationship is only for the convenience of describing the utility model and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that unless otherwise specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

The specific embodiments will be described below according to the overall structure of the soil nitrate nitrogen leaching measurement system provided by the present invention.

Fig. 1 is a schematic diagram showing the overall structure of a specific embodiment of the soil nitrate nitrogen leaching measurement system provided by the utility model.

As shown in Figure 1, the soil nitrate nitrogen leaching measurement system has a soil nitrate nitrogen leaching collection device.

Wherein, the soil nitrate nitrogen leaching collection device comprises a ceramic suction cup 1, a solution collection bottle 2, a vacuum pump 3, a water suction pipe 4, an air discharge pipe 5 and a vacuum suction pipe 6, and the ceramic suction cup 1 and the solution collection bottle 2 have respective Cover.

One end of the deflation pipe 5 is provided with a pipe plug 51, and the other end of the deflation pipe 5 and one end of the water suction pipe 4 pass through the cover of the ceramic suction cup 1 and are inserted into the inside of the ceramic suction cup 1 respectively; the other end of the water suction pipe 4 and One end of the vacuum pumping tube 6 is inserted into the solution collecting bottle 2 through the cover of the solution collecting bottle 2 ; the other end of the vacuum pumping tube 6 is connected to the pumping port of the vacuum pump 3 .

Further, the soil nitrate nitrogen leaching measurement system also includes a soil water potential detection device.

The soil water potential detection device includes a soil water potential sensor connected in sequence, a cable, a metal plug and a reading meter 7, the reading meter 7 has a display screen, and the reading meter 7 can convert the water potential data sensed by the soil water potential sensor into digital information and display it on the display screen superior.

Furthermore, the above reading meter 7 has one, the soil water potential sensor has a first soil water potential sensor 81 and a second soil water potential sensor 82, the cable has a first cable 91 and a second cable 92, and the metal plug has a first metal plug 101 and a second cable 92. The second metal plug 102 .

The first soil water potential sensor 81, the first cable 91, and the first metal plug 101 are connected in sequence with the reading meter 7; the second soil water potential sensor 82, the second cable 92, and the second metal plug 102 are connected in turn with the reading meter 7 connect.

It should be noted that, in the above structure, the metal plug and the reading meter 7 may be fixedly connected, or may be a plug-in detachable connection.

In addition, two bushings are inserted on the cover of the ceramic suction cup 1 . The other end of the air release pipe 5 is inserted into the inside of the ceramic suction cup 1 through one of the sleeves through the cover of the ceramic suction cup 1; one end of the water suction pipe 4 is inserted through the cover of the ceramic suction cup 1 into The interior of the ceramic suction cup 1.

Further, the above casing is a stainless steel casing.

In addition, two sleeves are inserted into the cover of the solution collection bottle 2 . The other end of the water suction pipe 4 is inserted into the inside of the solution collection bottle 2 through one of the sleeve tubes through the cover of the solution collection bottle 2; to the inside of the solution collection bottle 2.

Further, the above casing is a stainless steel casing.

In addition, the cover of the above-mentioned ceramic suction cup 1 and the cover of the solution collection bottle 2 are respectively made of organic glass.

In addition, the above-mentioned pipe plug 51 is a stainless steel nail.

In addition, the above-mentioned water suction pipe 4, air discharge pipe 5 and vacuum suction pipe 6 are respectively polyethylene hoses.

The structure of the present utility model has been described above, and its usage is described below.

When in use, drill a hole through the soil, bury the ceramic suction cup into the soil at a certain depth, collect the soil solution at this depth through the ceramic suction cup for soil solution sampling, and then measure the nitrate nitrogen in the collected soil solution according to the obtained sample Concentration.

Specifically, when sampling, a vacuum pump is used to pump air, and the solution collection bottle and the ceramic suction cup are pumped into a negative pressure. The pressure is between -40kPa and -80kPa. The tube enters the solution collection bottle; after the sample is taken, unplug the pipe plug on the vent tube to let the air enter the ceramic suction cup, and discharge all the solution in the ceramic suction cup into the solution collection bottle to ensure that it is the same as the next solution. Do not mix.

In addition, the soil water potential sensor is used to measure the water potential of the soil at 10cm above and below the buried layer of ceramic suction cups, so as to calculate the water flux of the buried layer of ceramic suction cups. The amount of soil water leached at the soil level, combined with the nitrate nitrogen content in the soil solution at the soil level calculated based on the soil solution collected by the soil nitrate nitrogen leaching collection device, the nitrate nitrogen at the soil level Leaching amount.

Among them, the leaching amount of soil nitrate nitrogen is calculated using the following formula:

Among them, Q is the leaching amount of soil nitrate nitrogen after applying fertilizer and water to the farmland;

C _i is the mass concentration of nitrate nitrogen in the soil solution;

ΔH is the water potential difference between the two water potential sensors;

ΔZ is the difference in the depth of the soil layer where the water potential sensor is located;

Δt _i is the i-th time period;

Ks is the saturated hydraulic conductivity;

h is the soil matrix potential;

α, n and m are the soil hydraulic parameters obtained by fitting the moisture characteristic curve.

The utility model only needs to drill and drill the soil, and the drilled holes can accommodate ceramic suction cups, and has the characteristics of little disturbance to the soil, easy operation, convenience and quickness, and the like.

In addition, in the above specific embodiment, the reading meter has one, the soil water potential sensor has a first soil water potential sensor and a second soil water potential sensor, the cable has a first cable and a second cable, and the metal plug has a first metal plug and a second Two metal plugs.

The first soil water potential sensor, the first cable and the first metal plug are connected in sequence and then connected to the reading meter; the second soil water potential sensor, the second cable and the second metal plug are connected in sequence and then connected to the reading meter.

According to the above structure, the water potential of the upper layer and the lower layer of the ceramic suction cup buried layer can be measured simultaneously through the same reading meter, which avoids errors caused by divided measurements, and can simplify the measurement steps and save manpower.

In addition, in the above specific embodiments, two sleeves are inserted on the cover of the ceramic suction cup.

The other end of the air discharge tube is inserted into the ceramic suction cup through the cover of the ceramic suction cup through one of the sleeves; one end of the suction tube is inserted into the inside of the ceramic suction cup through the cover of the ceramic suction cup through the other sleeve .

According to the above structure, therefore, it can be ensured that the parts of the air release pipe and the water suction pipe which communicate with the cover of the ceramic suction cup are not bent, thereby ensuring the smooth progress of the air release process and the water absorption process.

In addition, in the above-mentioned specific implementation manner, the sleeve is a stainless steel sleeve, thereby ensuring that the sleeve has high hardness and is not easily damaged, thereby ensuring a long service life of the sleeve.

In addition, in the above specific embodiments, two sleeves are inserted on the cover of the solution collection bottle.

The other end of the suction tube is inserted into the solution collection bottle through the cover of the solution collection bottle through one of the sleeves; one end of the vacuum suction tube is inserted into the solution collection bottle through the cover of the solution collection bottle through the other sleeve. internal.

According to the above structure, thus, it can be ensured that the parts of the water suction pipe and the vacuum suction pipe which communicate with the cover of the solution collection bottle are not bent, thereby ensuring the smooth progress of the water suction process and the suction process.

In addition, in the above-mentioned specific implementation manner, the sleeve is a stainless steel sleeve, thereby ensuring that the sleeve has high hardness and is not easily damaged, thereby ensuring a long service life of the sleeve.

In addition, in the above specific embodiment, the cover of the ceramic suction cup and the cover of the solution collection bottle are made of plexiglass respectively, so that the cover can be avoided from being corroded in the soil, thus the collected samples and their The surrounding soil causes pollution, which has the advantages of ensuring sample quality and being environmentally friendly.

In addition, in the above specific embodiment, the pipe plug is a stainless steel nail, so the pipe plug can be plugged and pulled out by using the nail head of the stainless steel nail, which can not only achieve a good sealing effect, but also be easy to plug and pull, and can simplify the operation steps.

In addition, in the above-mentioned specific embodiments, the water suction pipe, the air release pipe and the vacuum suction pipe are respectively polyethylene hoses, wherein polyethylene is non-toxic, environmentally friendly, and has low water absorption, and can be used without polluting the sample and the surrounding The sample is transported under the condition of soil; in addition, its soft characteristics enable each pipeline to be bent slightly according to actual needs without damage, ensuring the smooth progress of the sample collection process.

In addition, in the above-mentioned several specific embodiments, the specific structure of the present invention has been described, but it is not limited thereto.

For example, in the above specific implementation manner, the soil nitrate nitrogen leaching measurement system further includes a soil water potential detection device.

The soil water potential detection device includes a soil water potential sensor, a cable, a metal plug and a readout meter connected in sequence. The readout meter has a display screen, and the readout meter can convert water potential data sensed by the soil water potential sensor into digital information and display it on the display screen.

But it is not limited to this, and the above-mentioned soil water potential detection device may not be provided, but the soil water potential is detected by the drying weighing method or the psychrometer measurement method, which can also achieve the purpose of water potential detection, so as to carry out the next step. The calculation work of nitrate nitrogen leaching amount in this soil layer.

However, compared with the above-mentioned several methods, using the soil water potential detection device including the soil water potential sensor, cable, metal plug and reading meter connected in sequence in the specific embodiment for water potential detection, it only needs to put the soil water potential sensor into the soil It does not need to excavate and dry the soil, and compared with the wet and dry bulb, it can directly convert the measured water potential data into digital information and display it on the display screen, making data reading more convenient.

In addition, in the above specific embodiment, in the soil water potential detection device, the reading meter has one, the soil water potential sensor has a first soil water potential sensor and a second soil water potential sensor, the cable has a first cable and a second cable, and the metal plug It has a first metal plug and a second metal plug.

The first soil water potential sensor, the first cable and the first metal plug are connected in sequence and then connected to the reading meter; the second soil water potential sensor, the second cable and the second metal plug are connected in sequence and then connected to the reading meter.

But not limited to this, the above-mentioned cables and metal plugs can also be one respectively. During detection, the water potential of the upper and lower layers of a certain sampling layer of the soil is detected in stages, or two soil water potential detection devices are used to detect the water potential of the sampling layer. The water potential of the upper and lower layers can be detected synchronously, and the water potential detection function can also be realized. However, if it is set according to the structure in the specific embodiment, compared with the divided detection, the detected water potential data is more accurate due to the synchronization between the upper and lower layers. Compared with the detection by using two soil water potential detection devices, the specific The structure in the embodiment is more portable, and at the same time, it can avoid the problem that the measurement data is affected by the error between the two instruments, and can simplify the measurement steps and save manpower.

In addition, in the above specific embodiments, two sleeves are inserted on the cover of the ceramic suction cup. The other end of the air discharge tube is inserted into the ceramic suction cup through the cover of the ceramic suction cup through one of the sleeves; one end of the suction tube is inserted into the inside of the ceramic suction cup through the cover of the ceramic suction cup through the other sleeve .

Further, the above casing is a stainless steel casing.

But it is not limited to this, and the above-mentioned casing can also be not provided, and the other end of the air discharge pipe and one end of the water suction pipe can be directly inserted into the inside of the ceramic suction cup through the cover of the ceramic suction cup, and the same can be achieved for soil drenching. The solution collects the function, but, according to the structure in the specific embodiment, the above-mentioned sleeve pipe is set, thereby, can guarantee that the parts of the discharge pipe and the water suction pipe respectively connected with the cover of the ceramic suction cup do not bend, thereby Ensure the smooth progress of the deflation process and water absorption process.

In addition, the above-mentioned casing can also be not a stainless steel casing, but a plastic casing or a glass casing, as long as the functions of the above-mentioned casing can be realized. However, setting it as a stainless steel casing can ensure that the casing has a relatively High hardness, and not easy to damage, to ensure that the casing has a long service life.

In addition, in the above specific embodiments, two sleeves are inserted on the cover of the solution collection bottle. The other end of the suction tube is inserted into the solution collection bottle through the cover of the solution collection bottle through one of the sleeves; one end of the vacuum suction tube is inserted into the solution collection bottle through the cover of the solution collection bottle through the other sleeve. internal.

Further, the above casing is a stainless steel casing.

But it is not limited to this, and the above-mentioned sleeve pipe may not be provided, and the other end of the water suction pipe and one end of the vacuum suction pipe are respectively directly inserted into the inside of the solution collection bottle through the cover of the solution collection bottle, which can also achieve the same effect on the soil However, according to the structure in the specific embodiment, the above-mentioned casing is set, thereby, it can be ensured that the parts of the water suction pipe and the vacuum suction pipe respectively connected to the cover of the solution collection bottle do not bend , so as to ensure the smooth progress of the water absorption process and the air extraction process.

In addition, the above-mentioned casing can also be not a stainless steel casing, but a plastic casing or a glass casing, as long as the functions of the above-mentioned casing can be realized. However, setting it as a stainless steel casing can ensure that the casing has a relatively High hardness, and not easy to damage, to ensure that the casing has a long service life.

In addition, in the above specific implementation manner, the cover of the above-mentioned ceramic suction cup and the cover of the solution collection bottle are respectively made of organic glass.

But it is not limited to this, wherein, it is also possible that either one of the cover of the ceramic suction cup and the cover of the solution collection bottle is made of plexiglass, and the other is made of other materials such as plastic, or the porcelain suction cup Both the cap and the cap of the solution collection bottle are made of other materials such as plastic, as long as the cap can be achieved. However, plastic is easily corroded in wet soil. In contrast, plexiglass is used instead of The finished cover can avoid being corroded in the soil, thereby polluting the collected samples and the surrounding soil, which has the advantages of ensuring the quality of the samples and being environmentally friendly.

In addition, in the above-mentioned specific embodiment, the pipe plug is a stainless steel nail, but it is not limited thereto. The above-mentioned pipe plug can also be a rubber plug, etc., as long as it can achieve the function of isolating the inside of the air release pipe from the external environment. .

In addition, in the above-mentioned specific embodiment, the water suction pipe, the air discharge pipe and the vacuum suction pipe are respectively polyethylene hoses, but it is not limited to this, and the water suction pipe, the air discharge pipe and the vacuum suction pipe can also be set to be respectively glass pipes, etc. However, according to the structure in the specific embodiment, the water suction pipe, the air discharge pipe and the vacuum suction pipe are respectively set to be polyethylene hoses, wherein: polyethylene is non-toxic, environmentally friendly, and has less water absorption, and can be used without polluting samples and The samples are transmitted without the surrounding soil; in addition, its soft properties enable each pipeline to be bent slightly according to actual needs without damage, ensuring smooth sample collection.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the embodiments of the present utility model Scope of technical solutions.

Claims (10)

1. a kind of NO_3-- N Leaching measures system, which is characterized in that have NO_3-- N Leaching collection device, the soil Earth Nitrate N leaching collection device includes ceramic suction cup, solution receiving flask, vacuum pump, suction hose, bleeder pipe and vacuum suction Pipe,

The ceramics suction cup and the solution receiving flask are respectively provided with respective capping,

One end of the bleeder pipe is provided with pipe close,

The capping that one end of the other end of the bleeder pipe and the suction hose is each passed through the ceramic suction cup is inserted into described The inside of ceramic suction cup；

The capping that one end of the other end of the suction hose and the vacuum exhaust pipe is each passed through the solution receiving flask is inserted Enter to the inside of the solution receiving flask；

The other end of the vacuum exhaust pipe is connect with the pump port of the vacuum pump.

2. NO_3-- N Leaching according to claim 1 measures system, which is characterized in that the NO_3-- N Leaching Measurement system further includes soil water potential detection device,

The soil water potential detection device includes sequentially connected soil water potential sensor, cable, metallic plug and reading table,

The reading table has display screen, and the flow of water data that the reading table can sense the soil water potential sensor Digital information is converted into be shown on the display screen.

3. NO_3-- N Leaching according to claim 2 measures system, which is characterized in that the reading table has one A, the soil water potential sensor has the first soil water potential sensor and the second soil water potential sensor, and the cable has First cable and the second cable, the metallic plug have the first metallic plug and the second metallic plug,

First soil water potential sensor, first cable, first metallic plug are sequentially connected the rear and reading Table connection；

Second soil water potential sensor, second cable, second metallic plug are sequentially connected the rear and reading Table connection.

4. NO_3-- N Leaching according to claim 1 measures system, which is characterized in that in the envelope of the ceramic suction cup It covers and plugs there are two casing,

The other end of the bleeder pipe is inserted into the pottery by the capping that one of described sleeve pipe passes through the ceramic suction cup The inside of porcelain suction cup；

One end of the suction hose is inserted into the ceramics by the capping that another described sleeve pipe passes through the ceramic suction cup and inhales The inside of cup.

5. NO_3-- N Leaching according to claim 4 measures system, which is characterized in that described sleeve pipe is stainless steel sleeve Pipe.

6. NO_3-- N Leaching according to claim 1 measures system, which is characterized in that in the solution receiving flask It is plugged in capping there are two casing,

The other end of the suction hose is inserted into described by the capping that one of described sleeve pipe passes through the solution receiving flask The inside of solution receiving flask；

One end of the vacuum exhaust pipe is inserted into described by the capping that another described sleeve pipe passes through the solution receiving flask The inside of solution receiving flask.

7. NO_3-- N Leaching according to claim 6 measures system, which is characterized in that described sleeve pipe is stainless steel sleeve Pipe.

8. NO_3-- N Leaching according to claim 1 measures system, which is characterized in that the capping of the ceramics suction cup And/or the capping of the solution receiving flask is made of organic glass.

9. NO_3-- N Leaching according to claim 1 measures system, which is characterized in that the pipe close is stainless steel Nail.

10. NO_3-- N Leaching according to claim 1 measures system, which is characterized in that the suction hose, described Bleeder pipe and the vacuum exhaust pipe are respectively polyethylene hose.