The use of chemical herbicides is closely related to meteorological factors, and scientific use under appropriate weather conditions can greatly improve the efficacy of herbicides.
1. The “negative†influence of wind and rain weather and the countermeasures test results show that the herbicide can be reduced by about 5% when the herbicide is sprayed under the condition of wind speed exceeding 8-10 m/s. At the same time, the action of the net wind spray sprayed herbicide droplets can also drift with the wind to other sensitive crops nearby to cause phytotoxicity. Therefore, herbicides should be stopped in windy weather conditions; timely rainfall and appropriate rainfall (10 to 15 mm is preferred), which is beneficial to soil treatment of herbicides. The reason is that the rain can accelerate the spread and movement of the herbicide, and at the same time, the weed can fully absorb the herbicide in the process of rapid germination and growth, which is beneficial to improve the herbicidal effect. If the herbicide is applied before the seeding in the arid area, the weeding The performance is poor. If the rain is encountered after the application of the herbicide to the stem and leaf treatment, the sprayed agent is washed away by the rain, which will greatly reduce the efficacy of the herbicide. Therefore, if the herbicide is exposed to rain within 6 hours after spraying, the spray should be re-added.
2. "Negative" influence of temperature and humidity and countermeasures
The use of herbicides is proportional to the temperature. When the temperature is high, the weeds have a strong function of absorbing and transporting the herbicide, and the herbicide has high activity, and it is easy to exert the herbicidal action at the action site of the weeds. The test results show that the higher the temperature of air and soil is, the more effective the herbicide is, especially the herbicidal effect of stem and leaf treatment herbicide can be greatly improved, and the use of herbicide under low temperature conditions. The effect will not only be significantly reduced, but the detoxification effect of the crops in the crops will be slow due to low temperature, which will easily induce phytotoxicity. The temperature of applying the herbicide is preferably 20-35 ° C, and the effect of air humidity on the herbicides is also effective. The effect is obvious. Applying the stem and leaf herbicide in the case of relatively high air humidity can prolong the residence time of the herbicide on the weed leaf surface, help the open surface of the weed leaf, and absorb a large amount of herbicide to improve For the purpose of weeding effect, after the soil treatment herbicide is absorbed, it will be transported upward with a large amount of water, which is beneficial to inhibit photosynthesis and can significantly improve the herbicidal effect. Therefore, when the herbicide is used, the greater the humidity of the air, the more obvious the herbicidal effect; on the contrary, the herbicidal effect is lowered.
3. "Negative" influence and countermeasures of sunshine and drought
The strength of sunshine is also closely related to the use of herbicides. The use of herbicides under strong sunlight conditions is beneficial to the absorption and transmission of weeds by weeds. The strong temperature is the highest herbicide activity. It will also increase, which will improve the efficacy of herbicides, especially the stem and leaf treatment herbicides have the most obvious response to sunlight. It should be noted that the sensitivity of various herbicides to sunlight reaction is strong and weak. For example, ether can fully exert its effects after seeing light, and it is prone to photolysis and failure after exposure to light. Therefore, farmers must use strict instructions in accordance with the instructions for use. In dry weather conditions, due to low atmospheric humidity and low soil moisture, it is not conducive to the absorption of herbicides by weed roots, which will significantly reduce the use of herbicides. In addition, the herbicide is sprayed on the leaf surface of the weed, the drought will not only prevent the diffusion of the liquid in the leaf surface, but also inhibit the opening and respiration of the pores and lenticels on the weed surface. Activities are also limited, weeds grow slowly, their ability to absorb herbicides will be greatly reduced, which will also inhibit and affect the efficacy of herbicides.
High Speed Door Motor And Control Box
Our company have German SEW Motor, Japan Mitsubishi Controller. Our own brand Hofic servo motor and controller. Chinese famous brand SEJ motor and Holip controller.
About our German SEW Motor and Japan Mitsubishi Controller: It is easy to find the ideal energy-efficient motor for your application at SEW. The series has a suitable design in its range for the globally applicable efficiency classes. Select the power and frequency within this motor design and you have already taken care of the most important selection criteria.All other motor options are of course available independently of the efficiency class. A comprehensive braking concept and cost-optimised built-in encoders ultimately complement the motor range. Comprehensive braking concept and combinations i.e. up to three different brake sizes per motor size featured in the range: Cost-optimised built-in encoders integrated into the motor. Motors for efficiency classes IE1 to IE4.Compact design saves space and costs. Future-proof, also as regards environmental protection (standards). Reduction in operating costs when using energy-efficient motors; our energy-efficient motors conform to the efficiency classes.
About servo High Speed Door Servo Control System: Our rolling gate servo control system is suitable for high speed and high usage soft and hard rolling gate. The whole system is in a small and light package, it has high torque and high operating speed, lower noise, high reliability, smooth and soft operating curves, it`s suitable for high speed and usage environment. The rolling curtain can be controlled by pull switch, push button, Bluetooth, ground radar, ground magnetic sensors. Operating Speed: 1M/s; Operating Width: ＜16 ㎡; Daily operating time: ＞2000 time; Rated voltage: 220v; Rated Output: 0.75 KW/1.5KW.
The system can operated via: 1) control box; 2) inching electronic control; 3) continuous automatic operation; 4) emergency stop; 5) single side operation box; 6) time delay; 7) ground radar and/or magnetic sensors. Please refer to Wiring Terminal for eternal connections.
System has fuse/safety wire shutdown switch for three-phase power protection, fuse/safety wire for operating circuit protection, and temperature sensing relay for motor protection.
Stroke Controller utilizes absolute value encoder. Connect the absolute value encoder and reducer via encoder`s axle, and fix the wings on to the reducer, than insert the aviation plug into plug receptacle.
The mounting screw for the control box must inspect regularly to prevent screw been getting loose and falling off. Check the internal and external wirings. Check and change the oil for the redactor on regular basis.
Precision: The system use Full closed-loop servo control and Double Encoder design. This is to ensure long operating life and to prevent overshooting during operating.
Stability: The system utilizes integrated design concept, in order to simplify internal wiring and prevent any function caused by wiring and terminal connections.
High Speed: Motor max speed is 2500 rpm; door max operating speed is 2 m/s.
Smooth: The torque servo system can adjust torque to the load automatically, and its speed curve mode step less speed regulating to ensure a smooth operation.
About SEJ motor and Holip controller: Three-phase asynchronous motor with magnetic brake has broad uses, It is suitable for various mechanical main drive and auxiliary drive, and it is also used for various required rapid stopping and correct positioning. The braking time within 0.2 second. Electric motor is added the DZM series direct current electromagnetic arrester by the basic series(Y series) electric motor.The protection class of electric motor part is IP44,the arrester part is IP23.if be applicable to bad environment can also make the arrester part into IP44,but customer have to put forward a special request while ordering,the manufactory can design a manufacturing exclusively. Its structure diagram is picture 1 and 2,picture 1 is the structure with hand release.Picture 2 is the structure without the hand release.Its operating principle BE, after being to make the retardation coil(6)to connect direct current power supply,because of the function of electromagnetic force,electromagnet(7)attract gag bit(5),and compress spring(24),make arrester disc(2)away from the friction surface of the gag bit(5)and shield(26)(the electrical motor can immediately operate normally).When the power supply cuts off after,the electromagnet(7)loses electromagnet force,the spring(24)releases the gag bit(5)and compress tightly to arrester disc(2),the arrester function,stop(the motor shaft)quickly,make electric motor shop turning to move,for the second time connect power supply will repeat above-mentioned action.
High Speed Door Motor And Control Box,High Speed Door Motor,High Speed Door Servo Motor,Variable-Frequency Servo Motor
Shenzhen Hongfa Automatic Door Co., Ltd. , http://www.pvchighspeeddoor.com