Method for the electro-treatment of plants, in particular for green manure control

Abstract

Method for the electro-treatment of plants, in particular for green manure control, comprising the steps: (S100) connecting a first output of a first circuit arrangement (100a) having a first polarity (P1) to a first applicator (21a) of an applicator unit (2) and connecting a second output of the first circuit arrangement (100a) having a second polarity (P2) to a second applicator (21b) of the applicator unit (2), (S200) connecting a first output of a second circuit arrangement (100b) having the second polarity (P2) to the second applicator (21b) of the applicator unit (2) and connecting a second output of the second circuit arrangement (100b) having the first polarity (P1) to a third applicator (21c) of the applicator unit (2), (S300) bringing the first applicator (21a), the second applicator (21b) and the third applicator (21c) into contact with a stem and / or leaves of a plant and / or a soil successively and / or simultaneously, and (S400) Applying direct electrical current to the contacted stem and / or leaves and / or roots of the plant, where the first polarity (P1) is a positive polarity and the second polarity (P2) is a negative polarity, and wherein the first applicator (21a) and the second applicator (21b) as well as the third applicator (21c) are arranged one behind the other in the direction of travel (FR) with which the applicator unit (2) is moved over plants during the electrical treatment.

Description

[0001] The invention relates to a method and a treatment device for the electrotreatment of plants, in particular for green manure control. Furthermore, the invention relates to an applicator unit for such a treatment device and a carrier vehicle with such a treatment device.

[0002] Green manure is a natural method in agriculture for soil cover and improvement. It primarily refers to the targeted cultivation and subsequent killing of plants that are not harvested but remain in the field for purposes such as erosion control, nutrient conservation, or soil improvement / humus formation. Cover crops can also be used for this purpose during the final cultivation phase. A cover crop is a crop grown between other primary crops as green manure or for use as animal feed.

[0003] The use of direct electrical current for the electrical treatment of plants is known, for example, from US 2 007 383 and WO 2019 / 052591 A1, while the use of direct or alternating electrical current is known, for example, from WO 2018 / 095450 A1 or WO 2018 / 050142 A1.

[0004] From WO 2022 / 144371 A2 it is known to directly connect low-voltage sides and / or high-voltage sides of transformers in order to realize series or parallel connections.

[0005] An applicator unit for the electrical treatment of plants is known from US 2022 / 0132831 A1.

[0006] Further devices for the electro-treatment of plants are known from WO 2019 / 052591 A1 and DE 10 2018 003 199 A1.

[0007] There is therefore a need to identify ways in which improvements can be achieved, particularly with regard to the effectiveness of electro-treatment of plants as part of green manure control.

[0008] The object of the invention is achieved by a method for the electro-treatment of plants, in particular for green manure control, comprising the steps: Connecting a first output of a first circuit arrangement having a first polarity to a first applicator of an applicator unit and connecting a second output of the first circuit arrangement having a second polarity to a second applicator of the applicator unit, Connecting a first output of a second circuit arrangement having the second polarity to the second applicator of the applicator unit and connecting a second output of the second circuit arrangement having the first polarity to a third applicator of the applicator unit, Bringing the first applicator, the second applicator and the third applicator into contact with a stem and / or leaves of a plant and / or a soil successively and / or simultaneously, and Applying direct electrical current to the contacted stem and / or leaves and / or roots of the plant, where the first polarity is a positive polarity and the second polarity is a negative polarity, and wherein the first applicator and the second applicator as well as the third applicator in the direction of travel with which the applicator unit is Electrical treatment is moved over plants, arranged one behind the other.

[0009] In other words, two circuit arrangements are used to supply direct current to an applicator unit having a trio of applicators, consisting of the first applicator, the second applicator, and the third applicator. The second applicator is electrically connected to both circuit arrangements in a homopolar manner, while the first applicator and the third applicator are each electrically connected only to the first circuit arrangement and the second circuit arrangement, respectively. The second applicator is supplied with a negative polarity, while the first applicator and the third applicator are each supplied with a positive polarity. The first circuit arrangement and / or the second circuit arrangement can be designed to maintain a substantially constant electrical power, e.g., by pulse width modulation and / or frequency modulation.

[0010] Furthermore, the first applicator and the second applicator as well as the third applicator are arranged one behind the other in the direction of travel with which the applicator unit is moved over plants during the electrical treatment.

[0011] By interconnecting the two circuit arrangements of the applicator unit with the applicator trio, the distance between the first and second applicators, or between the second and third applicators, can be increased, and the resulting current paths can penetrate deeper into the soil. This can, in particular, improve the electrical treatment of plant parts in the soil, such as plant roots, for example, as part of green manure control.

[0012] According to one embodiment, the first circuit arrangement and / or the second circuit arrangement comprises an indirect converter. For example, the respective converter can be an indirect converter with direct voltage in the intermediate circuit (also known as a voltage-source inverter - VSI). Such a converter comprises, for example, a rectifier, such as a three-phase rectifier, a DC voltage circuit with a capacitor as an energy store in the intermediate circuit, and an output-side inverter. By using an indirect converter, extensive decoupling of an output from an input of the indirect converter can be achieved via the intermediate circuit and its energy store. By using a capacitor, for example, instead of a coil as an energy store as in an indirect converter with direct current in the intermediate circuit (current-source inverter - CSI), the circuit arrangement is comparatively lighter.

[0013] According to a further embodiment, the first circuit arrangement and / or the second circuit arrangement comprises a resonant circuit. For example, the resonant circuit can be a series resonant circuit. The series resonant circuit can also be considered a resonant converter. High electrical voltages can be generated particularly easily using such a series resonant circuit.

[0014] According to a further embodiment, the first circuit arrangement and / or the second circuit arrangement are designed to have galvanic isolation on the output side. For example, the galvanic isolation can be implemented by a transformer, so that the galvanic isolation is designed as inductive isolation. The galvanic isolation prevents an electrical current from flowing between two circuits, wherein a first of the circuits, a primary circuit, comprises the primary winding and a second of the circuits, a secondary circuit, comprises the secondary winding of the transformer. With such galvanic isolation, the electrical potentials are separated from one another and the two circuits are then potential-free from one another. Furthermore, secondary circuits, which comprise secondary windings of the transformer, are also separated from one another.These secondary circuits can therefore be circuits that, in addition to secondary windings of transformers, also contain identical applicator pairs or even identical applicator trios of applicators within an applicator unit for applying electrical current to plants. Such pairs or trios of applicators can be arranged adjacent to one another in an applicator row, which then form the secondary circuits during operation. Separating such secondary circuits increases operational safety, since a dangerous current flow only occurs if a person touches two applicators belonging to a pair of applicators or a trio of applicators within an applicator unit.

[0015] According to a further embodiment, the first circuit arrangement and / or the second circuit arrangement comprises a rectifier. The rectifier can be a passive rectifier, e.g., a bridge rectifier with diodes and a downstream smoothing capacitor, to which the applicators for applying electrical current to plants are directly electrically connected. This provides a direct electrical voltage, i.e., an electrical voltage without a change in sign, with a predetermined residual ripple.

[0016] The invention further includes a treatment device for green manure control by electro-treating plants, an applicator unit for such a treatment device and a carrier vehicle with such a treatment device.

[0017] The invention will now be explained with reference to the figures. They show: Fig. 1 shows a schematic side view of an embodiment of a carrier vehicle with a treatment device for the electro-treatment of plants. Fig. 2 shows a schematic plan view of the Fig. 1 shown carrier vehicle with the treatment device for the electro-treatment of plants. Fig. 3 shows a schematic representation of a circuit arrangement associated with the treatment device. Fig. 4 an applicator unit according to an embodiment of the device shown in the Fig. 1 and Fig. 2 shows a treatment device for the electrical treatment of plants. Fig. 5 shows a schematic representation of a process flow for the operation of the Fig. 1 and Fig. 2 shown carrier vehicle.

[0018] First, the Fig. 1 referred to.

[0019] In Fig. Figure 1 shows an arrangement of individual components of a treatment device 1 for green manure control by electro-treating plants on an agricultural machine serving as a carrier vehicle 30. The plants may be other land plants (Embryophyta), such as higher plants, or vascular plants, particularly plants with a structure of roots, stems, and leaves (corms).

[0020] With the treatment device 1, green manure control can be achieved by applying an electric current to plants. It can be provided to reduce electrical contact resistances by applying a contact resistance-reducing substance mixture 15, such as a suitable liquid, prior to applying the electric current.

[0021] Agricultural machinery is a specialized type of machine used primarily in agriculture. It can be self-propelled, towed by, or permanently attached to an agricultural towing vehicle, such as a tractor. In other words, the agricultural machine can be a self-propelled towing vehicle or a trailer without its own power that is towed by a towing vehicle.

[0022] In the present embodiment, the carrier vehicle 30 is designed as a tractor. Deviating from the present embodiment, the carrier vehicle 30 can also be designed as a fertilizing, seeding, or harvesting machine that has been modified by attaching the components of the treatment device 1. For this purpose, the components of the treatment device 1 can also be provided in the form of a kit. For example, the kit can include components of a treatment device 1 designed as an attachment.

[0023] The treatment device 1 can have one or more modules 10, 20, each of which can be configured as an attachment. The treatment device 1 can be configured as a machine / agricultural machine, i.e., as interchangeable equipment consisting of up to two attachments that are simultaneously mounted on the carrier vehicle 30. Furthermore, the treatment device 1 can be configured as interchangeable equipment, i.e., as a device that the driver of the carrier vehicle 30 attaches to it after its commissioning in order to change or expand its function, provided that this equipment is not a tool.

[0024] In the present embodiment, the treatment device 1 comprises a first module 10 for applying the contact resistance-reducing substance mixture 15 and a second module 20 for transmitting direct electrical current to plants. By applying the contact resistance-reducing substance mixture 15, contact resistances, e.g., between applicators and contacted plant parts, can be reduced. Furthermore, the tendency toward arcing is reduced, which reduces energy consumption.

[0025] Deviating from the present exemplary embodiment, the treatment device 1 can also have only a second module 20 for transmitting electrical current to the plants. Furthermore, it can be provided that, for example, in a combination consisting of a towing vehicle and a trailer pulled by the towing vehicle, the first module 10 is assigned to the towing vehicle and components of the second module 20 are assigned to the towing vehicle and the trailer. The components of the second module 20 can also be assigned only to the trailer. Furthermore, the components of the first module 10 and the second module 20 can be assigned to the trailer.

[0026] In the present embodiment, the first module 10 is arranged at the front and the second module 20 at the rear of the carrier vehicle 30. This arrangement allows the application of the contact resistance-reducing substance mixture 15 to always take place before or simultaneously with the electrotreatment of plants by applying an electric current, such as a direct current.

[0027] The first module 10 has at least one application device designed to apply the contact resistance-reducing substance mixture 15 to the plants. The first module 10 has a plurality of jointly or preferably individually controllable nozzles 11, which are arranged in a desired overall working width of the treatment device 1 (e.g., 0.3 - 48 m, preferably 6 - 27 m). In the present exemplary embodiment, the carrier vehicle 30 supplies mechanical drive energy for an electric generator 32 of the second module 20 via a power take-off shaft 31 or a hydraulic circuit, which electric generator 32 is located in the rear area of the carrier vehicle 30 in the present exemplary embodiment. If the carrier vehicle 30 has an electrified drive train, a power supply to the second module 20 can also be provided without the interposition of the generator 32. In treatment devices 1 with very high energy requirements, e.g.,For very high working widths or carrier vehicles 30 without sufficient free power capacity, independent power generator systems can also be used, which can be coupled to the carrier vehicle 30, mounted on a trailer or moved on a trailer.

[0028] In the present embodiment, the generator 32 provides three-phase electrical current with three phases L1, L2, L3 (see Fig. 3) with a power of 160 kVA at an electrical voltage of 400 V with a frequency of 50 Hz to 60 Hz.

[0029] The three-phase electrical current is transmitted via electrical lines to at least one transformation and control unit 33 of the second module 20.

[0030] In the present embodiment, the second module 20 comprises an applicator unit 2 with a plurality of applicators 21a, 21b, 21c for applying direct electrical current to plants, which are arranged one behind the other in the direction of travel FR, so that plants first come into contact with the first applicator 21a, then with the second applicator 21b, and finally with the third applicator 21c of the applicator unit 2. Deviating from the present embodiment, more than two applicator units 2 or more than three applicators 21a, 21b, 21c can also be provided. The applicators 21a, 21b, 21c are arranged on a parallelogram-like support structure 24.

[0031] In the present embodiment, the three applicators 21a, 21b, 21c are metallic applicators in order to keep at least the electrical resistance at the respective contact points of the plants as low as possible.

[0032] In the present embodiment, the three applicators 21a, 21b, and 21c are so-called short applicators (also called short range blades - SRBs), whose spacing is in the range of 0.1 m to 0.5 m. Deviating from the present embodiment, the three applicators 21a, 21b, and 21c can be designed as long applicators (also called long-range applicators, tongue applicators, or long-range blades - LRBs). Such applicators have a spacing of 0.8 m to 1 m, for example.

[0033] It will now also focus on the Fig. 2 is referred to.

[0034] A plurality of applicator units 2 are arranged next to one another in an applicator row 12, wherein the extension direction of the applicator row 12 preferably extends transversely, in the present embodiment at an angle of 90°, to the direction of travel FR of the carrier vehicle 30.

[0035] In the Fig. Figure 2 shows that a section A of an area with plants was treated with the treatment device 1 by applying a direct electric current. For this purpose, the carrier vehicle 30 moved the treatment device 1 in the direction of travel FR at a speed v over the section A and applied a direct electric current across the entire width b of the applicator row 12. Thus, each applicator unit 2 applies a strip-shaped section A of the area.

[0036] For this purpose, the treatment device 1 in the present embodiment is assigned a plurality of circuit arrangements 100a, 100b of the second module 20, the structure of which is described with additional reference to Fig. 3 is explained.

[0037] In the present exemplary embodiment, each of the applicator units 2 of the applicator row 12 is assigned a first circuit arrangement 100a and a second circuit arrangement 100b, i.e., each applicator unit 2 of the applicator row 12 has two circuit arrangements 100a, 100b, which—as will be described in detail later—are electrically connected to the three applicators 21a, 21b, 21c. Deviating from the present exemplary embodiment, an applicator unit 2 can also have more than three applicators 21a, 21b, 21c, of which at least three applicators 21a, 21b, 21c—as will be described in detail later—are electrically connected to the two circuit arrangements 100a, 100b.

[0038] The first circuit arrangement 100a and the second circuit arrangement 100b are electrically connected via a contactor assembly 102, e.g., in a control cabinet of the transformation and control unit 33, to the three phases L1, L2, L3 and are non-separably connected to a neutral conductor N of the generator 32. Thus, if necessary, e.g., for safety reasons, the first circuit arrangement 100a and the second circuit arrangement 100b can be electrically disconnected from the generator 32.

[0039] In the present embodiment, the neutral conductor N is electrically connected and grounded to a housing of the first circuit arrangement 100a or the second circuit arrangement 100b.

[0040] In the present exemplary embodiment, the first circuit arrangement 100a or the second circuit arrangement 100b has the following components: a line filter 104, a contactor assembly 106, an inverter 108, a resonant circuit 116, a transformer 122, a rectifier 124 and a control unit 136 for controlling the first circuit arrangement 100a or the second circuit arrangement 100b.

[0041] The line filter 104 is electrically connected to the three phases L1, L2, and L3, which can be isolated by the contactor assembly 106. In the present embodiment, the line filter 104 is designed to filter out interfering frequencies and other interference signals from the three phases L1, L2, and L3.

[0042] The contactor assembly 106 of the first circuit arrangement 100a or the second circuit arrangement 100b following the mains filter 104 can electrically separate the downstream inverter 108 from the mains filter 104.

[0043] In the present embodiment, converter 108 is an indirect converter with DC voltage in the intermediate circuit (also known as a voltage-source inverter - VSI). Components of converter 108 shown are a rectifier, in the present embodiment an AC / DC converter 110, a DC voltage circuit with an intermediate circuit capacitor 112, and an output-side inverter, in the present embodiment a DC / AC converter 114. Deviating from the present embodiment, other converter types can also be used.

[0044] An oscillating circuit 116 is connected to the output side of the inverter 108. For example, the oscillating circuit 116 can be a series oscillating circuit, the components of which are shown as an inductance 118 and a capacitor 120.

[0045] The resonant circuit 116 is electrically connected to an input of the transformer 122. In the present embodiment, the transformer 122 has two magnetically coupled coils, thus providing galvanic isolation between the input side of the transformer 122 and its output side.

[0046] The output side of the transformer 122 is electrically connected to the rectifier 124, which in the present embodiment is a bridge full rectifier with a downstream smoothing capacitor 126.

[0047] Through the interaction of the inverter 108 and the resonant circuit 116 as well as the transformer 122 with the downstream rectifier 124, in the present embodiment an electrical 3-phase current with an electrical voltage of 400 V can be converted into an electrical direct voltage U with 1,600 V to 5,500 V with a maximum residual ripple of 5% to 20% (in the frequency range 60 kHz to 100 kHz).

[0048] The electrical voltage U is composed of a constant constant value and a residual ripple value, with the residual ripple value fluctuating between a maximum and a minimum value. The difference between the maximum and minimum values corresponds to the peak-to-valley value.

[0049] The peak-to-valley value is less than 1,000 V. In the present embodiment, the peak-to-valley value is in a range from 100 V to 500 V, depending on the load (pure ohmic resistance).

[0050] Thus, during operation, the first circuit arrangement 100a or the second circuit arrangement 100b provides a first polarity P1, in the present embodiment, a positive polarity, at a first output and a second polarity P2, in the present embodiment, a negative polarity, at a second output.

[0051] For electrical protection, in the present embodiment, a fuse 128a, 128b is provided between the first applicator 21a and the second applicator 21b or between the second applicator 21b and the third applicator 21c.

[0052] In the present exemplary embodiment, the control unit 136 is supplied with operating energy from the three phases L1, L2, L3, with an AC / DC converter 134 connected upstream of the control unit 136 providing an electrical direct voltage of 24 V.

[0053] Furthermore, in the present embodiment, the control unit 136 is connected to a current measuring device 130 and a voltage measuring device 132 in a measured value-transmitting manner.

[0054] The ammeter 130 measures an electrical current intensity of the electrical current I flowing through the first applicator 21a and the second applicator 21b or the second applicator 21b and the third applicator 21c, while the voltmeter 132 measures a voltage level of an electrical voltage U between the first applicator 21a and the second applicator 21b or the second applicator 21b and the third applicator 21c.

[0055] In the present exemplary embodiment, the control unit 136 is designed to control the inverter 108, in particular the DC / AC converter 114, using control signals AS in such a way that a substantially constant electrical power is provided by the first circuit arrangement 100a or by the second circuit arrangement 100b through pulse width and / or frequency modulation. A substantially constant electrical power is understood to mean an electrical power whose values fluctuate within a usual range around a power setpoint, ie, which deviate from the power setpoint by 3%, 5%, or 10%, for example.

[0056] In other words, the respective control unit 136 of the first circuit arrangement 100a or the second circuit arrangement 100b permanently detects a respective strength of an electrical direct current I and a level of an electrical direct voltage U on a secondary side of the transformer 122, so that a value for the ohmic resistance can be determined at any time.

[0057] During operation, the respective control units 136 are given a respective target value SW for the DC power output to be delivered, e.g., by the driver, e.g., based on load distribution. If the respective detected ohmic resistance at the applicators 21a, 21b, 21c is too high (a maximum electrical DC voltage is reached), the DC power output drops in proportion to the ohmic resistance. However, the level of the applied electrical DC voltage U remains unchanged due to a voltage limitation. Since the electrical DC voltage U and the electrical DC current I can now also be measured, a value for the ohmic resistance can be reliably determined in this state as well. The same applies to a current limitation. Once a maximum electrical DC current is reached, the delivered electrical DC power drops linearly with the ohmic resistance.Even in this operating state, the strength of the direct electrical current I and the level of the direct electrical voltage U on the secondary side continue to be reliably measured.

[0058] It will now also Fig. 4 referred to.

[0059] The applicator unit 2 is shown with the two circuit arrangements 100a, 100b, which are electrically connected to the three applicators 21a, 21b, 21c. In other words, the applicator unit 2 can also be considered to comprise a trio of applicators.

[0060] In the present exemplary embodiment, the first output of the first circuit arrangement 100a with a first polarity P1 is electrically connected to the first applicator 21a and the second output of the first circuit arrangement 100a with the second polarity P2 is electrically connected to a second applicator 21b of the applicator unit 2, while the first output of the second circuit arrangement 100b with the second polarity P2 is electrically connected to the second applicator 21b and the second output of the second circuit arrangement 100b with the first polarity P1 is electrically connected to a third applicator 21c of the applicator unit 2.

[0061] The second applicator 21b is electrically connected to both circuit arrangements 100a, 100b with the same polarity, while the first applicator 21a and the third applicator 21c are each electrically connected only to the first circuit arrangement 100a and the second circuit arrangement 100b, respectively. In the present embodiment, the second applicator 21b is supplied with the second polarity P2, in the present embodiment with a negative polarity, while the first applicator 21a and the third applicator 21c are each supplied with the first polarity P1, in the present embodiment with a positive polarity.

[0062] It will now also Fig. 5 to explain a method sequence for operating the treatment device 1 for the electro-treatment of plants, in particular for green manure control.

[0063] In a first step S100, the first output of the first circuit arrangement 100a with the first polarity P1 is electrically connected to the first applicator 21a and the second output of the first circuit arrangement 100a with a second polarity P2 is electrically connected to the second applicator 21b of the applicator unit 2.

[0064] In a further step S200, the first output of the second circuit arrangement 100b with the second polarity P2 is electrically connected to the second applicator 21b and the second output of the second circuit arrangement 100b with the first polarity P1 is electrically connected to the third applicator 21c of the applicator unit 2.

[0065] In a further step S300, the first applicator 21a and the second applicator 21b as well as the third applicator 21c are brought into contact with a stem axis and / or leaves of a plant and / or a soil one after the other and / or simultaneously.

[0066] In a further step S400, the contacted stem axis and / or the contacted leaves are directly and / or roots of the plant are indirectly - ie through the soil - subjected to direct electrical current.

[0067] In a further step S500, the electrical power is kept substantially constant by the first circuit arrangement 100a and / or by the second circuit arrangement 100b. For this purpose, the respective control unit 136 controls the respective inverter 108 of the respective circuit arrangement 100a or 100b using control signals AS such that the respective electrical power is kept substantially constant.

[0068] The first circuit arrangement 100a and / or the second circuit arrangement 100b can each have an indirect converter 108 and / or a resonant circuit 116, and / or they can each be designed to have galvanic isolation on the output side, and / or they can each have a rectifier 124, which during operation in the present exemplary embodiment, through their interaction, convert an electrical 3-phase current with an electrical voltage of 400 V into an electrical direct voltage U with 1,600 V to 5,500 V with a maximum residual ripple of 5% to 20% (in the frequency range 60 kHz to 100 kHz).

[0069] Deviating from the present embodiment, the order of the steps may also be different. Furthermore, multiple steps may be executed simultaneously. Furthermore, deviating from the present embodiment, individual steps may be skipped or omitted.

[0070] By interconnecting the two circuit arrangements 100a, 100b with the applicator trio of the applicator unit 2, the applicator spacing between the first applicator 21a and the second applicator 21b, or between the second applicator 21b and the third applicator 21c, can be increased, and a greater penetration depth of the resulting current paths into the soil can be achieved. This can, in particular, improve the electrical treatment of plant parts in the soil, such as plant roots, particularly in the context of green manure control. List of reference symbols 1 treatment device 2 Applicator unit 10 first module 11 Nozzle 12 applicator rows 15 mixture of substances 20 second module 21a electric applicator 21b electric applicator 21c electric applicator 24 Support structure 30 carrier vehicles 31 PTO 32 Generator 33 Transformation and Control Unit 100a circuit arrangement 100b Circuit arrangement 102 Contactor assembly 104 line filters 106 Contactor assembly 108 inverters 110 AC / DC converters 112 DC link capacitor 114 DC / AC converters 116 resonant circuit 118 Inductance 120 capacity 122 Transformer 124 rectifiers 126 smoothing capacitor 128a fuse 128b fuse 130 ammeter 132 Voltmeter 134 AC / DC converters 136 Control unit A area section AS control signal b width FR direction of travel I direct current L1 phase L2 phase L3 phase N neutral conductor SW setpoint U DC voltage v Driving speed S100 step S200 Step S300 step S400 step S500 step

Claims

[1] Method for the electro-treatment of plants, in particular for green manure control, comprising the steps: (S100) connecting a first output of a first circuit arrangement (100a) having a first polarity (P1) to a first applicator (21a) of an applicator unit (2) and connecting a second output of the first circuit arrangement (100a) having a second polarity (P2) to a second applicator (21b) of the applicator unit (2), (S200) connecting a first output of a second circuit arrangement (100b) having the second polarity (P2) to the second applicator (21b) of the applicator unit (2) and connecting a second output of the second circuit arrangement (100b) having the first polarity (P1) to a third applicator (21c) of the applicator unit (2), (S300) bringing the first applicator (21a), the second applicator (21b) and the third applicator (21c) into contact with a stem and / or leaves of a plant and / or a soil successively and / or simultaneously, and (S400) Applying direct electrical current to the contacted stem and / or leaves and / or roots of the plant, where the first polarity (P1) is a positive polarity and the second polarity (P2) is a negative polarity, and wherein the first applicator (21a) and the second applicator (21b) as well as the third applicator (21c) are arranged one behind the other in the direction of travel (FR) with which the applicator unit (2) is moved over plants during the electrical treatment. [2] Method according to claim 1, wherein the first circuit arrangement (100a) and / or the second circuit arrangement (100b) comprises an indirect converter (108). [3] Method according to claim 1 or 2, wherein the first circuit arrangement (100a) and / or the second circuit arrangement (100b) comprises a resonant circuit (116). [4] Method according to claim 1, 2 or 3, wherein the first circuit arrangement (100a) and / or the second circuit arrangement (100b) are designed to have a galvanic isolation on the output side. [5] Method according to one of claims 1 to 4, wherein the first circuit arrangement (100a) and / or the second circuit arrangement (100b) comprises a rectifier (124). [6] Treatment device (1) for the electro-treatment of plants, in particular for green manure control, with an applicator unit (2) with a first applicator (21a) and a second applicator (21b) as well as a third applicator (21c) for bringing into contact with a shoot axis and / or leaves of a plant and / or a soil successively and / or simultaneously, and with a first circuit arrangement (100a) and a second circuit arrangement (100b), wherein a first output of the first circuit arrangement (100a) with a first polarity (P1) is connectable to the first applicator (21a) and a second output of the first circuit arrangement (100a) with a second polarity (P2) is connectable to the second applicator (21b),wherein a first output of the second circuit arrangement (100b) having the second polarity (P2) is connectable to the second applicator (21b) and a second output of the second circuit arrangement (100b) having the first polarity (P1) is connectable to a third applicator (21c), wherein the first polarity (P1) is a positive polarity and the second polarity (P2) is a negative polarity, and wherein the first applicator (21a) and the second applicator (21b) as well as the third applicator (21c) are arranged one behind the other in the direction of travel (FR) with which the applicator unit (2) is moved over plants during the electro-treatment. [7] Treatment device (1) according to claim 6, wherein the first circuit arrangement (100a) and / or the second circuit arrangement (100b) comprises an indirect converter (108). [8] Treatment device (1) according to claim 6 or 7, wherein the first circuit arrangement (100a) and / or the second circuit arrangement (100b) comprises an oscillating circuit (116). [9] Treatment device (1) according to one of claims 6 to 8, wherein the first circuit arrangement (100a) and / or the second circuit arrangement (100b) comprises a rectifier (124). [10] Carrier vehicle (30), in particular a self-propelled agricultural machine, with a treatment device (1) according to one of claims 6 to 9.

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