CN102116668B - Device for metering retention quantity change of spray medicine liquid on surface of plant leaf - Google Patents

Abstract

The invention relates to a metering device for changing the retention amount of sprayed liquid on the surface of plant leaves, comprising: a glass cover, an electronic balance, a leaf-carrying platform, a leaf-carrying platform support rod, a leaf-carrying platform base, a trumpet-shaped sleeve, and an electronic balance. Inside the glass cover, the base of the leaf carrier is placed on the electronic balance, and a small hole is opened on the top of the glass cover. The support rod of the leaf carrier passes through the small hole and is inserted into the base of the leaf carrier for support. The leaf carrier is fixed on the leaf carrier On the top of the support rod, the trumpet-shaped pipe sleeve is buckled on the upper surface of the glass cover and is sleeved on the outside of the support rod of the leaf loading platform, and its inner wall is loosely matched with the supporting rod of the leaf loading platform. The metering device of the present invention can be used to measure the change of the retention amount of the sprayed medicinal liquid on the surface of the plant leaves. Compared with the method of directly immersing in the medicinal liquid, the device of the invention is used to test the retention of the medicinal liquid, the simulation process is consistent with the actual situation, and the simulation result is true and credible.

Description

Metering device for changing the retention of sprayed liquid on the surface of plant leaves

technical field

The invention relates to a simple metering device for changing the retention amount of medicinal liquid on the surface of plants, in particular to a simple metering device for changing the retention amount of medicinal liquid on the surface of plants in a spray state, and belongs to the technical field of pesticide use.

Background technique

In order to control harmful organisms that harm crops, pesticides are often used in farmland. The most common method in the use of pesticides in our country is to use different spraying equipment for pesticide field spraying. The retention capacity of pesticide solutions with different physical and chemical properties on different plant surfaces is different. Since the retention capacity of various plants for different pesticide liquids is not clear, it can often be seen that the amount of sprayed liquid exceeds the maximum retention capacity of the target plant surface and a large amount of water is lost. On the one hand, it causes waste and pollutes the environment. Therefore, it is necessary to understand the retention capacity of different pesticide solutions on the surface of target plants, so as to provide a basis for controlling the amount of pesticide solution in the field, or improving the retention capacity of pesticide solution on the surface of target plants by changing the physical and chemical properties of the pesticide solution.

The existing method is generally to directly immerse the leaves of the plant in the liquid medicine, and measure the retention of the liquid medicine per unit area of the leaves in the static state after weighing, but this is different from the retention of the liquid medicine in the dynamic state of the leaves during spraying. . Immersing the leaves directly in the medicinal liquid is wetting, which is a process in which the solid-liquid interface replaces the solid-air interface. When spraying, the mist falls on the leaves and wetting is wetting, which is the liquid-air interface and the solid-air interface. The process by which an interface becomes a solid-liquid interface. Secondly, most of the liquid medicines used for spraying contain surfactants, which have the property of being adsorbed at the interface. When spraying, the liquid medicine forms a large number of fine mist droplets, the new liquid-air interface expands rapidly, the surfactant molecules on the liquid-air interface are greatly diluted, the surface tension of the liquid medicine rises, and the surfactant inside the liquid medicine It takes time for the molecules to transfer to the new liquid-gas interface, but the droplet landing on the leaf surface is completed in an instant, so the surface tension of the droplet is often too high when the droplet touches the leaf surface. Wet the spread, thereby affecting the retention of liquid medicine on the leaf surface, so the determination of the retention of liquid medicine in the spray state can better reflect the actual situation in the field. If the leaves are directly immersed in the liquid medicine, the surfactant in the liquid medicine is more likely to transfer to the new interface, and it is easier to wet the leaves, so that the retention of the liquid medicine on the surface of the leaves is relatively large, which cannot correctly reflect the medicine under field conditions. The retention capacity of the liquid on the surface of the target plant.

Contents of the invention

The purpose of the present invention is to provide a kind of loss point and unit of the pesticide liquid on the surface of the target plant leaf which is close to the actual situation in the field for studying the retention capacity of the pesticide liquid with different physical and chemical characteristics sprayed on the surface of the target plant leaf by different spraying techniques. Metering device for maximum stable holdup on area blades.

In order to solve the above technical problems, the present invention provides a metering device for changing the amount of sprayed liquid on the surface of plant leaves, which is characterized in that it includes: a glass cover, an electronic balance, a leaf-carrying platform, a leaf-carrying platform support rod, a leaf-carrying platform base, Trumpet-shaped casing, the electronic balance is placed inside the glass cover, the base of the leaf loading platform is placed on the electronic balance, and a small hole is opened on the top of the glass cover, and the support rod of the leaf loading platform passes through the small hole and inserted into the loading platform. The base of the leaf stage is supported, and the leaf stage is fixed on the top of the support rod of the leaf stage. Loose fit.

One side of the glass cover is provided with a glass sliding door, and the slide groove of the glass sliding door is embedded in the glass cover for fixing the glass sliding door and facilitating the movement of the glass sliding door. The leaf loading platform can form any included angle with the ground within the range of 0°～90°, thus simulating the target plant leaves with different angles with the ground. The leaf loading platform support rod and the leaf loading platform base can pass through the The casing is connected.

Put the electronic balance into the glass cover, and align the tray of the electronic balance with the small hole above the glass cover. Place the leaf stage base into the tray of the electronic balance. Place the flared sleeve over the small hole above the cover glass. Use double-sided tape to paste the leaves of the target plant on the leaf-carrying platform, and insert them into the casing on the base of the leaf-carrying platform through the small hole above the trumpet-shaped casing and the glass cover. The leaf-carrying platform blocks the tube at the upper end of the trumpet-shaped casing. mouth. Turn on the power, turn on the balance, close the glass sliding door, and then spray the leaves on the leaf loading platform. The change of the reading on the balance indicates that the retention of the liquid medicine on the leaves increases. When the reading on the balance reaches a maximum The maximum value is the loss point of the medicinal solution on the leaves of the target plant, and then the reading continues to decline and finally reaches a stable value. The stable reading is the maximum stable retention of the medicinal solution by the leaves.

Further, in the metering device of the present invention for changing the amount of sprayed medicinal liquid on the surface of plant leaves, ring-shaped protrusions are provided around the small hole at the top of the glass cover to prevent the medicinal liquid from flowing into the glass cover through the small hole.

In order to facilitate the adjustment of the angle between the leaf loading platform and the supporting rod of the leaf loading platform, further, the metering device of the present invention is also provided with an angle adjustment mechanism.

When spraying, the nozzle should be 30cm to 50cm away from the leaf loading platform. If it is too close, it will affect the atomization quality of the liquid medicine, and the momentum of spraying will affect the reading. The liquid medicine sprayed on the top of the glass cover will not flow into the balance tray in the glass cover due to the obstruction of the ring-shaped protrusion around the small hole. The mist will not be sprayed on the wall of the tube connected to the leaf stage and affect the balance reading.

The metering device of the present invention can measure the change of the retention amount of the sprayed medicinal liquid on the surface of the plant leaves, and the test results truly reflect the retention of the medicinal liquid on the surface of the plant leaves under the spraying state in farmland operations. Compared with the method of directly immersing in the medicinal liquid, the device of the invention is used to test the retention of the medicinal liquid, the simulation process is consistent with the actual situation, and the simulation result is true and credible.

The invention has the advantages of ingenious conception, simple structure, convenient use and good effect. It will be widely welcomed in the industry and has a good market prospect.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a structural schematic diagram of the metering device of the present invention.

Fig. 2 is a graph showing the loss point curves of different concentrations of TX-10 on the leaves of Nanjing 44 rice.

Fig. 3 is a graph showing the maximum retention of different concentrations of TX-10 on the leaves of Nanjing 44 rice.

Fig. 4 is a curve diagram of the loss point of solutions of different concentrations of Jiexiaoli on the leaves of Nanjing 44 rice.

Fig. 5 is a graph showing the maximum retention of solutions of different concentrations of Jiexiaoli on the leaves of Nanjing 44 rice.

Detailed ways

As shown in Fig. 1, it is the metering device of the change of the retention amount of the spray liquid on the surface of the plant blade of the present invention, which includes: a glass cover 1, an electronic balance 7, a leaf-carrying platform 9, a leaf-carrying platform support rod 91, and a leaf-carrying platform base 8 , the trumpet-shaped sleeve 10, the electronic balance 7 is placed inside the glass cover 1, the leaf carrier base 8 is placed on the electronic balance 7, the top of the glass cover 1 is provided with a small hole 4, and the leaf carrier support rod 91 passes through the small hole 4 and inserted into the leaf loading platform base 8 to be supported, the leaf loading platform 9 is fixed on the top of the leaf loading platform support rod 91, the trumpet-shaped sleeve 10 is buckled on the upper surface of the glass cover 1 and is sleeved outside the leaf loading platform support rod 91, Its inner wall is loosely matched with the supporting rod of the leaf loading platform. A glass sliding door 2 is arranged on one side of the glass cover 1, and a chute 3 of the glass sliding door 2 is embedded in the glass cover 1 for fixing the glass sliding door and facilitating the movement of the glass sliding door. The leaf loading platform can form any angle within the range of 0° to 90° with the ground, thereby simulating the target plant leaves forming different angles with the ground. In this example, the leaf loading platform support rod 91 and the leaf loading platform base 8 can pass through The sleeve pipe 6 on the base of the leaf loading platform is connected. A ring-shaped protrusion 5 is arranged around the small hole 4 on the top of the glass cover 1 to prevent liquid medicine from flowing into the glass cover from the small hole 4 and affect the measurement accuracy. In this embodiment, three kinds of leaf loading platforms are designed. The included angles between the leaf loading platform and the supporting rods of the leaf loading platform are 60°, 45°, and 30° respectively. After installation, the angles between the leaf loading platform and the horizontal plane are respectively 30° °, 45° and 60°. In the following experiments, the spray liquid retention test was carried out for the leaves of these three laying angles. In principle, the angle between the leaf loading table and the horizontal plane can be any value between 0° and 90°. In order to adjust the angle conveniently, an angle adjustment mechanism can be set between the leaf loading table and the supporting rod of the leaf loading table for It is used for adjusting the angle between the leaf loading platform and the supporting rod of the leaf loading platform. As shown in Figure 1, in the present embodiment, the leaf stage (from the spraying direction) blocks the nozzle of the trumpet-shaped sleeve upper end, to prevent the medicinal liquid from entering the glass cover from the nozzle or adhering to the leaf stage support pole.

The operation steps of using this device to carry out the experiment on the retention of sprayed liquid on the surface of plant leaves are as follows:

Put the electronic balance 7 into the glass cover 1, and align the tray of the electronic balance with the small hole 4 above the glass cover 1. Put the leaf carrier base 8 into the tray of the electronic balance 7. Cover the horn-shaped sleeve 10 on the small hole 4 above the glass cover 1 . Paste the leaves of the target plant on the leaf loading platform 9 with double-sided adhesive tape, and insert them into the sleeve tube 6 on the leaf loading platform base 8 through the trumpet-shaped casing 10 and the small hole 4 above the glass cover, and the leaf loading platform 9 blocks the The mouth of mouth of bell-shaped sleeve pipe 10 upper ends. Turn on the power supply, open the electronic balance 7, close the glass sliding door 2, and spray the blades on the leaf loading platform 9. The change in the readings on the electronic balance shows that the retention of the liquid medicine on the blades increases. When the reading of the balance reaches a maximum value, it begins to decline. The maximum value is the loss point of the liquid medicine on the target plant leaves, and then the reading continues to decline and finally reaches a stable value. The stable reading is the maximum stability of the leaf to the liquid medicine. retention volume.

When spraying, the nozzle should be 30cm to 50cm away from the leaf loading platform. If it is too close, it will affect the atomization quality of the liquid medicine, and the momentum of spraying will affect the reading. The liquid medicine that is sprayed on glass cover 1 top can not flow in the electronic balance 7 pallets in glass cover 1 because of the stop of annular protrusion 5 around aperture 4, because of horn-shaped sleeve pipe 10 and leaf stage 9 pairs of horn-shaped sleeves Tube 1 - the shielding function of the nozzle at the upper end, the mist will not be sprayed on the tube wall connected to the leaf loading platform 9 and affect the balance reading.

The following are the experiments carried out using this device

Experiment 1

The changes of the loss point and the maximum stable retention of different concentrations of TX-10 solutions on the rice leaves of Nanjing 44 at three angles of 30°, 45° and 60° (included angles with the horizontal plane), can be seen from Fig. 2 and Fig. 3 It can be seen that when the concentration of TX-10 solution is 31.25mg/L, the loss point and the maximum stable retention are the largest.

Experiment 2

The changes of the loss point and the maximum stable retention of different concentrations of Jiexiaoli solution on the leaves of Nanjing 44 rice at three angles (angles with the horizontal plane) of 30°, 45° and 60° can be seen from Figure 4 and Figure 5 It can be seen that when the concentration of TX-10 solution is 62.5mg/L, the loss point and the maximum stable retention are the largest.

Experiment 3

The loss points and the maximum stable retention of clear water on the leaves of Nanjing 44 rice at three angles of 30°, 45° and 60° (included angles with the horizontal plane) are small. The loss point and the maximum stable retention on the leaves of Nanjing 44 rice at three angles of 45° and 60° were significantly increased (see Table 1).

Experiment 4

The loss point and the maximum stable retention of the 5% Jinggangmycin aqueous solution on the leaves of Nanjing 44 rice at three angles (angles with the horizontal plane) of 30°, 45° and 60° were smaller, and the After adding the Jiexiaoli solution, the loss point and the maximum stable retention of the medicinal solution on the rice leaves of Nanjing 44 from three angles were significantly increased (see Table 1).

Experiment 5

The 10% imidacloprid wettable agent has a small loss point and maximum stable retention on the leaves of Nanjing 44 rice at three angles (angles with the horizontal plane) of 30°, 45° and 60°, so adding After treatment with Jiexiaoli solution, the loss point and the maximum stable retention of the drug solution on the leaves of Nanjing 44 rice from three angles were significantly increased (see Table 1).

Experiment 6

The liquid medicine of 70% imidacloprid water-dispersible granules has smaller loss points and maximum stable retention on the leaves of Nanjing 44 rice at three angles (angles with the horizontal plane) of 30°, 45° and 60°. After adding the Jiexiaoli solution, the loss point and the maximum stable retention of the medicinal solution on the rice leaves of Nanjing 44 from three angles were significantly increased (see Table 1).

Experiment 7

The liquid medicine of 25% pymetrozine suspensible concentrate had smaller loss points and maximum stable retention on the rice leaves of Nanjing 44 at three angles (angles with the horizontal plane) of 30°, 45° and 60°. After adding the Jiexiaoli solution, the loss point and the maximum stable retention of the medicinal solution on the rice leaves of Nanjing 44 from three angles were significantly increased (see Table 1).

Experiment 8

The 50% carbendazim wettable agent had a smaller loss point and maximum stable retention on the rice leaves of Nanjing 44 at three angles (angles with the horizontal plane) of 30°, 45° and 60°. After adding the Jiexiaoli solution to the rice, the loss point and the maximum stable retention of the medicinal solution on the rice leaves of Nanjing 44 from three angles were significantly increased (see Table 1).

Table 1 Changes in the loss point and maximum stable retention of different medicinal solutions on the leaves of Nanjing 44 rice

In addition to the above-mentioned embodiments, the present invention can also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims (7)

1. The metering device for the change of the retention amount of sprayed liquid on the surface of plant leaves, characterized in that it includes: a glass cover, an electronic balance, a leaf-carrying platform, a leaf-carrying platform support rod, a leaf-carrying platform base, and a trumpet-shaped sleeve. The balance is placed inside the glass cover, the base of the leaf loading platform is placed on the electronic balance, and a small hole is opened on the top of the glass cover, and the supporting rod of the leaf loading platform passes through the small hole and is inserted into the base of the leaf loading platform to be supported. The platform is fixed on the top of the support bar of the leaf loading platform, the horn-shaped casing is buckled on the upper surface of the glass cover and is sleeved on the outside of the supporting bar of the leaf loading platform, and its inner wall is loosely matched with the supporting bar of the leaf loading platform. 2. The metering device for changing the amount of sprayed medicinal liquid on the surface of plant leaves according to claim 1, wherein a ring-shaped protrusion is arranged around the small hole at the top of the glass cover to prevent the medicinal liquid from entering through the small hole. into the glass cover. 3. The metering device for changing the retention amount of sprayed liquid on the surface of plant leaves according to claim 1, characterized in that: the leaf loading platform and the supporting rod of the leaf loading platform form an included angle of 0° to 90°. 4. The metering device according to claim 3, wherein the amount of retention of spraying liquid on the surface of plant leaves changes, wherein the angle between the leaf loading platform and the supporting rod of the leaf loading platform is 60°, 45° or 30° . 5. The metering device according to claim 1, wherein the amount of retention of the spraying liquid on the surface of the plant leaves changes, and it is characterized in that: there is an angle adjustment mechanism for adjusting the angle between the leaf-carrying platform and the leaf-carrying platform support rod , so that the angle between the leaf loading table and the supporting rod of the leaf loading table is adjusted and fixed at any angle from 0° to 90°. 6. The metering device for changing the retention amount of the sprayed medicinal liquid on the surface of the plant leaf according to claim 1, wherein the leaf loading platform blocks the nozzle at the upper end of the trumpet-shaped casing to prevent the medicinal liquid from flowing through the tube. The mouth enters the glass cover or is attached to the support rod of the leaf stage. 7. The metering device for changing the retention amount of sprayed liquid on the surface of plant leaves according to claim 1, characterized in that: a glass sliding door is provided on one side of the glass cover, and the chute of the glass sliding door is embedded in the glass cover.

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