As the weather gets colder, the celery in the greenhouse is more hollow and more fiber, which is mostly caused by the high temperature and low humidity in the greenhouse environment. High temperature can accelerate the differentiation of tissues, while low humidity cannot meet the needs of plants for water, thereby decomposing the pith tissue of the plant, resulting in hollow celery and increased fiber. To avoid this phenomenon, we must do a good job in temperature and humidity management.
When planting celery in autumn, people are afraid that watering will cause the soil temperature to drop and affect the growth of celery. In fact, proper watering will not affect the growth of celery. Watering is generally done every 15 days, and the amount of water should not be too large, just a little water. 15 days before harvest, water should be poured twice. Celery likes to be cold, so the room temperature should be appropriately lowered during management and kept at 15 to 18 degrees Celsius.
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What is Mini Camera
Micro mini camera is a product of modern high-tech, also known as micro monitor. It has the characteristics of small size, powerful function and good concealment.
Micro cameras are widely used in aviation, commerce, media, enterprises, institutions, families and other industries. The appearance of micro cameras has brought convenience to people's lives. At the same time, some phenomena related to corporate secrets and personal privacy have also emerged.
In 1991, the world's first camera (called CoffeeCam) first appeared in the Trojan room coffee pot at the University of Cambridge, UK.
The oldest camera, FogCam of San Francisco State University, has been used since 1994
In 1996, AXIS Communications published the first IP Camera using Internet architecture as the basis for signal transmission.
In 1999, AXIS Communications published IP Camera based on Linux system.
Wireless camera
Wireless equipment is used stably in domestic wireless environment. The micro wireless surveillance camera has the characteristics of high stability, high speed, long distance and multi-point testing. It can play a huge role in the fields of environment, energy, construction, transportation, medical treatment, industrial machine condition monitoring, etc., especially when the cabling is complex, the cabling cost is high, the long-distance and large-scale transmission of data and the mobility demand is high.
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