Tomato plants themselves can produce adventitious roots, but adventitious roots are not a normal condition. Generally, when the plant roots are stunted and vascular bundle diseases occur and the plant growth is inhibited, the plants need more roots to absorb the nutrients for self-regulation and produce a large number of adventitious root systems. Therefore, tomato plants produce a large number of adventitious roots, not the diseases of the leaves, but rather belong to a systemic hazard. Specific prevention measures include:
1. Roots are stunted or there are soil-borne diseases such as root rot. The main reason for the indefinite root system is: the rain enters the shed or the open-air tomatoes suffer from rain. After rainwater enters the shed, it can cause root damage or harmful substances that cause damage to the root system. In particular, the main root can be pulled out for detailed inspection. Infected soil-borne diseases, such as root rot and verticillium wilt, can cause root rot and plants also have a large number of adventitious root systems. Its prevention and control methods: timely discharge of rainwater, and later pay attention to conservation of root system, can rush to apply chitin, alginic acid and other rooting and rooting fertilizer; for soil-borne diseases, you can choose the formula: water, copper and pine resin + chitin root irrigation .
2. Infection with bacterial diseases. Bacterial pith necrosis and bacterial wilt, in particular, result in the destruction of the vascular system of the plant, which produces a large number of adventitious root systems on the stem. Its prevention and control methods: The key lies in prevention. It can choose bacterial agents such as mycin, chloramphenicol, and chlorobromoisocyanuric acid. Irrigation can be done at the same time, mesitine + copper rosin + chitin.
3. Burn roots. The main reason is that the base fertilizer is unscientific. It has not been decomposed or unreasonably applied pesticides. This leads to burning of roots, and it also causes a large number of adventitious root systems in stems. Its prevention and cure method: Chong Shi EM biological bacterial fertilizer or chitin, solution to damage and promote growth.
4. Excessive use of inhibitors. Some vegetable farmers control the growth of plants, and they always need some foliar spraying agents, such as paclobutrazol, B9, and Adenosine, etc. If they are used too much, the growth of the plants will be inhibited too much, which will also lead to a large number of adventitious root systems. Control methods: To promote the growth, you can choose chitin + cytokinin foliar spray, the effect is significant.
The Digital Video Recorder, also called the DVR/ DVR Security System/ DVR monitor/Digital Video Recorder H.264/ DVR CCTV, is the video storage device of the AHD Four in One Camera(the video capture device). The Digital Video Recorder records the video with the hard disk that we put in it, and it is a computer system for image storage and processing, which has the functions of long-term image recording, voice recording, remote monitoring and control of images/voices.
The Digital Video Recorder is far superior to the analog monitoring equipment in terms of the image processing, image storage, retrieval, backup, network transmission, and remote control because of the adoption of the digital recording technology.
By the way, there are many BNC video interfaces on the back of the Digital Video Recorder, each interface can be connected to an analog suveillance camera. Just plug the interface, then it works, very convenient!
Generally speaking, the Digital Video Recorder can be divided into the hard disk video recorder, the PC type hard disk video recorder and the embedded hard disk video recorder, etc. Among them, the embedded hard disk video recorder does well in the stablity, the reliability, and the easy use, and the embedded hard disk video recorder will gradually invade the market of the PC type hard disk video recorder.
Besides, The main functions of the Digital Video Recorder include: monitoring function, recording function, playback function, alarm function, control function, network function, password authorization function and work schedule function.
Monitoring function: The monitoring function is one of the most important functions of the Digital Video Recorder. Whether it can monitor the on-site camera video clearly is a core issue of the surveillance system. Most Digital Video Recorders can achieve clear on-site surveillance.
Recording function: The video resolution is the core of the digital host because the video effect is more important to the Forensics than the on-site video effect. Most Digital Video Recorder can achieve on-site recording at 25 frames per second.
Alarm function: The alarm function mainly includes the input alarm of the detector and the alarm of the image and video detection. Once received the alarm signal, the system will automatically start recording, and turn on the corresponding spotlight, siren and network output signal via the alarm output function. The image motion detection is the main alarm function of the Digital Video Recorder.
Control function: The control function refers to the omnidirectional control of the PTZ and lens via the host, which is generally finished by the dedicated decoder and the keyboard.
Network function: The user can do various operations to the host such as the monitoring, recording and control after the simple identification on the LAN or WAN, which is similar to the local opertaion.
Password authorization function: in order to reduce the failure rate of the system and illegal entry, a password need to be set for procedures such as stopping video recording, arming and disarming the system and entering programming, so that unauthorized people cannot operate these procedures. The Password authorization is usually set as the multi-level password authorizations.
Work Schedule function: The user can program the working time for one certain period of time of one certain camera, which is also the unique function of the host of the Digital Video Recorder. The user can pre-schedule all the changes of holidays and working schedules into the program, which can realize the unattended in some extence.
All in all, the Digital Video Recorder represents the developing direction of CCTV monitoring system and it has been the first choice on the CCTV monitoring system market.
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