Facility vegetables need to be carefully managed
Tomatoes, cucumbers, eggplants and other vegetables grown in greenhouses and greenhouses have reached the peak of fruit harvesting. The plants grow rapidly, the transpiration is large, the water demand is high, and the management is good and the quality and quality are related.
Adjust the appropriate growth environment
The temperature adjusts the temperature of the greenhouse suitable for crop growth depending on the crop and weather conditions. The warm crops such as tomatoes are sunny from daylight to 23°C to 30°C at 2 pm, from 2 pm to 26°C to 23°C at night, and 18°C ​​to 20°C at night; leafy vegetables such as celery are 20 during the day. °C~25°C, nighttime is 10°C~12°C. The daytime temperature on cloudy days should be reduced by 3 °C ~ 5 °C. Avoid the temperature of the greenhouse is too high or too low, especially to maintain the temperature difference between day and night from 10 °C to 13 °C.
Air humidity requires different air humidity for melon and fruit vegetables that are both warm. Peppers prefer a humid environment. At noon on sunny days, water sprays or micro-spray sprays should be installed to increase air humidity. Tomatoes and eggplants prefer a dry growing environment with a suitable humidity of 45% to 60%. Reduce air humidity by means of ventilation and moisture reduction, reducing watering, etc., to ensure the normal growth of crops and prevent the spread of pests and diseases.
Light in sunny days at noon is too strong, which will adversely affect crops, reduce yield and quality, and cause physiological diseases such as bud and sunburn. On sunny days from 11:00 am to 3:00 pm, cover the shading net with a shading rate of 60%~70% on the roof, or spray the “Liliang†cooling material to shading and reduce the temperature inside the shed.
Timely harvest
Late harvesting not only affects fruit and plant growth, but also reduces quality. Try to harvest in the early morning on a sunny day, the quality and taste of the product are better than other time harvest.
Timely finishing of plants
The leaves are used to remove the old leaves, yellow leaves, diseased leaves and side branches of the lower part of the plant to facilitate ventilation and light transmission and to reduce nutrient consumption. Generally, tomato and cucumber maintain 12 to 16 functional leaves per plant; eggplant and pepper maintain 30 to 40 functional leaves per plant.
When the tomatoes are in the right place, they will grow to the tip of the ear. Generally, the results are 4 to 6 ears per plant, and 2 to 3 leaves are left on the top of the upper ear to remove the top.
Thin fruit
Excessive flowers and fruits on tomato and pepper plants are removed early, and the deformed fruit and the oversized and undersized fruits on each ear are removed early to achieve a fruit shape, a uniform fruit, and a high commodity rate. .
Scientific watering and fertilizing
Scientific watering should be based on weather, crop growth and soil moisture. It is better to pour water in small water. Tomato and eggplant are usually watered once every 5~8 days; cucumber and pepper are watered once every 3 days to avoid excessive drought and excessive watering. Generally, the topdressing is stopped 30 days before the pulling, and the foliar spray fertilizer can be used to quickly supplement the nutrition.
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4G Mini Camera Structural components
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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