The weather turns colder and the temperature drops significantly in many places. Once the temperature drops sharply, crops will inevitably suffer low temperature damage. Greenhouse growers should cover with mulch film at the end of autumn and early winter to raise the ground temperature, while improving the physical and chemical properties of the soil and inhibiting the growth of weeds. The operation of mulching film is simple, but four misunderstandings of film mulching should be avoided.
The mulch sticks to the base of the plant stem
When covering with mulch film, do not put the mulch film close to the roots and stems of the plant, which may cause the phenomenon of dead seedlings. Because the mulching film is close to the stems, when the temperature is high, the water evaporated from the soil will condense into water droplets on the mulching film and flow down the stem base. Day after day, a high temperature and high humidity environment is formed at the stem base. Plant diseases or even dead seedlings.
Cover mulch only in the operation line
In order to reduce costs, growers only lay mulch in the shed. This phenomenon should be avoided. Because the mulch film laid in the operation line cannot take advantage of the mulch film, but highlights its disadvantages. In the production of greenhouse vegetables, the most important role of mulching is to reduce the humidity in the greenhouse and reduce the occurrence of diseases. However, the practice of covering the mulch in the operation row and not covering the planting row is not good for reducing the humidity in the shed, because most of the time when the vegetables are watered, the planting row is watered, and the planting row does not have much effect on reducing air humidity. Nor can it have the effect of heat preservation.
Full shed covering film
Covering the whole shed with plastic film can effectively inhibit the production of weeds in the shed, but it also inhibits the gas exchange between the soil and the air, especially after watering, the soil has poor air permeability, which prevents root respiration, poor root growth and absorption The ability of nutrient elements is weakened, which seriously affects plant growth.
For sheds that need to be covered with a full shed, it is recommended to use steel wire or bamboo poles to support the planting row mulch, and set one at a distance to achieve watering under the film, which not only improves the air permeability of the soil, but also makes it difficult for moisture to evaporate. Reduce the humidity in the shed. The operation method is to cover crop straw, which not only raises the ground temperature, but also regulates the humidity in the shed.
Premature coating in the shed
Film mulching is too early in autumn. After the plants are planted, the outside temperature has not yet decreased. Immediately mulching will cause excessive temperature increase and prone to stuffy roots. On the other hand, after mulching, a moist environment is formed on the ground surface, which is not conducive to rooting. Growth may lead to failure of squatting seedlings, making it difficult to cultivate strong seedlings. According to the weather conditions, it is recommended to cover with mulch 15 days after planting, which is conducive to piercing the roots of seedlings and cultivating strong trees.
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What is Battery Mini Camera
Micro 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, and at the same time, some phenomena related to corporate secrets and personal privacy have also emerged A9 Mini CameraWireless
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. Secret Video camera
The main structures and components of the camera can be listed from the working principle of the camera:
1. LENS
Lens structure, consisting of several lenses, including plastic lens or glass lens
2. Image sensor
It can be divided into two categories:
CCD (charge couple device): charge coupled device
CMOS (complementary metal oxide semiconductor): complementary metal oxide semiconductor
3. Digital signal processing chip (DSP)
There are many DSP manufacturers, such as VIMICRO 301P/L, SONIX 102/120/128, ST (Logitech LOGITECH's DSP provider), SUNPLUS (SUN+focuses on the development of CIF and VGA for single chip, but the image quality is average), PIXART (original phase), PAC207, SQ930C, etc.
4. Power supply
Two working voltages are required inside the camera: 3.3V and 2.5V. The latest process chip can use 1.8V.
Some cameras also use video transmission lines for synchronous power supply without external power lines.
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Shenzhen Fuvision Electronics Co., Ltd. , https://www.szsolarcamera.com