According to the growth habits and experience over the years, fertilization should be applied twice in spring: once every 30 days before flowering, and once before 5 and 6 days before flowering (most areas in southern Guangxi are in full bloom in mid-May and late) . According to the calculation of 50 kg of fresh fruit per mu, it is generally required to apply 20 kg of urea per acre, 30 kg of calcium magnesium phosphate, and 10 to 15 kg of potassium chloride. The first application of urea 7.5 kg, 15 kg of phosphate fertilizer, mixed application; the second application of urea 12.5 kg, phosphate fertilizer 15 kg, potassium fertilizer 10 ~ 15 kg, mixed application.
It should be noted that the fertilizer applied after the rain stops planting will dissolve, and the seedlings will be easily absorbed; if the fertilizer is too concentrated, the fertilizer will be burnt and the seedlings will be burned, resulting in reduced yield or loss. In the case of drought, it can be fertilized by artificial watering. In addition, before fertilization, the garden must be cleared, and the dead, weak, and diseased seedlings should be removed, and the leaves on the planted land should be covered to facilitate growth and facilitate artificial pollination. Also pay attention to repair the sidewalks and drainage ditch of the site; if the seedlings are insufficiently shaded, trees should be planted in the spring.
Description
Conductivity controllers (transmitters) are electrochemical measuring instruments that are mainly used to measure the conductivity of solutions. They are important tools for evaluating the electrolyte content or ion concentration in liquids such as water and chemical reaction solutions. Conductivity controllers measure the ability of liquids to conduct current, reflecting their conductivity, and then inferring the electrolyte content or ion concentration in the solution. In addition to measurement, it also has a control output function, which can adjust the electrode position or output signal according to the measurement results to maintain a stable conductivity.
The working principle of the conductivity controller is based on the conductivity of the electrolyte solution. Specifically, when the current passes through the electrolyte solution, the ions (cations and anions) in the solution move under the action of the electric field to form a current. The controller measures the voltage drop between the electrodes and the known electrode distance to calculate the conductivity. The conductivity value is affected by factors such as ion concentration, ion type, electrode material, temperature, etc.
The conductivity controller usually consists of the following parts:
Sensor: As the input signal source of the control system, it detects the electrolyte content in the water and transmits the signal to the subsequent processing unit.
Transmitter: Convert the electrical signal detected by the Conductivity Sensor into a standard signal (such as current or voltage signal) and output it to the controller.
Controller: According to the feedback result of the input signal, dynamically adjust the electrode position or output the control signal to maintain a stable conductivity.
Conductivity controllers are widely used in various fields, including but not limited to:
Electroplating industry: Used to control the electrolyte content in the plating solution to ensure the quality of electroplating.
Water treatment: Monitor and control water quality to ensure purity and meet the requirements of use.
Chemical industry: Measure and control the conductivity of the reaction solution during the chemical reaction process to optimize the reaction conditions.
Environmental monitoring: Assess the degree of water pollution and monitor changes in water quality.
The conductivity controller can be connected with an analog dual-electrode stainless steel or graphite conductivity sensor to achieve continuous online monitoring of the conductivity value of water. The control function is the biggest advantage of the conductivity controller. Daruifuno's conductivity controller has two configurable relays. Users can set specific conductivity thresholds and trigger alarms or automatic control operations when they exceed or fall below the set value to achieve automated process control and protection. In addition, current output is also a major feature of the conductivity controller. Two 4-20mA currents can not only output conductivity values, but also resistivity, salinity, TDS, temperature and other parameter values. The online conductivity controller has up to 5-point calibration function. The conductivity controller is compact and suitable for cabinet panel installation, and is widely used in various water treatment occasions.
As China's leading manufacturer and supplier of high-quality conductivity controllers/transmitters, our instruments can accurately measure the conductivity of various water bodies. If you have more questions, please feel free to contact us, we have professional sales to communicate with you.
Conductivity Controller,Conductivity Transmitter
Suzhou Delfino Environmental Technology Co., Ltd. , https://www.daruifuno.com