In order to prevent tomatoes from falling, fruit-setting hormones used in production are 2,4-d and anti-deceasing hormone. Farmers should pay special attention to the following points in their use: 1, the use of concentration: 2,4-d use concentration is generally 10ppm-20ppm, the use of anti-dropping agent concentration is generally 20ppm-40ppm, take the lower limit of the concentration of high-temperature, low-temperature concentration when the limit. Before the use of the flower test should be carried out first, picking up a few normal flowers, if 4-5 days after the ovary began to expand, that the concentration is appropriate; if within 3 days the ovary began to enlarge, indicating that the concentration is too high; if a week No ovary enlargement was observed, indicating that the concentration was too low. 2, the use of time: when the flowers to the top of the flower to see the yellow and not fully open or when the flowers are the best shape. It is easy to cause burnout prematurely, but it does not work until the flowers are lantern-shaped. In the sunny afternoon, it is better to have flowers in the morning, because the condensation of the plant surface will cause the concentration of the liquid to change and produce phytotoxicity. 3, the treatment site: with a brush to mix the light solution on the pedicel or pedicel, or dip the entire inflorescence in the solution, do not sprinkle the solution on the young leaves or growing points when processing, otherwise it will make The leaves become bar-shaped fern leaves that grow slowly, especially 2,4-d, and are most susceptible to phytotoxicity. 4, fertilizer and water supply: the use of hormones to prevent flowering flowers, promote fruit hypertrophy, but no fertilizer effect. Therefore, after using hormones, it is necessary to scientifically and reasonably top-dress and strengthen management. In addition, after the first fruit is used with fruit hormone, all other fruit should be used. Otherwise, the following fruits will absorb nutrients in a large amount, and the upper ear will not get the necessary nutrients. Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone
What is DVR Mini Camera
Dvr, which is called DigitalVideoRecorder in full, is a digital video recorder. Compared with traditional analog video recorders, dvr uses hard disk for recording, so it is often called hard disk recorder, also called DVR. It is a set of computer system for image computing, storage and processing. It has the functions of long-time video recording, recording, remote monitoring and control of images/voice and dynamic frames. DVR integrates five functions, including video recorder, picture splitter, PTZ lens control, alarm control, and network transmission. One device can replace a large number of devices in the analog monitoring system, Moreover, it has gradually gained advantages and popularity in terms of price.
The function of DVR, with the increase of various voltage sensitive loads in the distribution network, puts forward higher requirements for power quality. However, due to system accidents in the power system, the voltage flicker, drop and other disturbances caused by the startup and shutdown of large equipment, lightning stroke and other principles are unavoidable. Moreover, in the current power grid, the ability to quickly restore power supply after power interruption is far from meeting the requirements of many sensitive loads. Therefore, it is necessary to provide users with stable and uninterrupted high-quality power when interference occurs. Dynamic voltage recovery (DVR) is the choice to solve the above problems today. DVR is connected in series to the feeder line that requires high-quality power to realize dynamic real-time voltage compensation for the line, so that the load end can get the desired high-quality power, and ensure the normal and uninterrupted operation of sensitive user equipment.
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The "digitalization" of DVR means that compression and storage technology is aimed at digital signals, rather than directly transmitting digitally encoded video images. Therefore, DVR must be deployed near the analog camera.