Precocious tomato planting in spring depends on the microclimate conditions in the greenhouse. The indicator is that the 10cm ground temperature should be stable above 8°C, the minimum air temperature above 0°C (preferably 6-7°C), and stable after 5-7 days. In order to plant early in time, it should be roasted in the ground 15-20 days before planting, and it is usually planted in late March-April-March. The management after planting is mainly the control of temperature and humidity and the management of watering, top dressing and cultivating. Temperature and humidity control requires higher temperatures after planting to accelerate seedlings and lay the material foundation for flowering and fruit setting. Therefore, after 3-4 days after planting, the air is kept at a temperature of about 25-30°C, and the air humidity is about 80%. After reducing the temperature, the greenhouse temperature should be reduced, and the amount of ventilation should be increased. During the day, it should be 20-25°C and 13-15°C at night. However, the night temperature should not be too low, otherwise the normal development of plants will be affected and the humidity will drop to about 60%. In the fruit enlargement period, the temperature can be appropriately increased, during the day 25-28 °C, 15-17 °C at night, air humidity 45% -60%, soil moisture 85% -95%. When the fruit is close to maturity, the temperature of the shed can be slightly increased by 2-3°C to speed up the ripening of the fruit. However, after hanging red lines should not be high temperature, otherwise it will affect the formation of lycopene, adverse coloring and affect the quality. In order to maintain a suitable temperature, when the minimum night temperature is not lower than 15°C, ventilation can be performed day and night. During the period of watering, topdressing, and cultivating, it is necessary to create a high-humidity environment and prevent the ground temperature from being lowered due to improper watering. After easing the seedlings, the seedlings shall be used to pour the seedlings once and then apply urea 5-10 kilograms per acre with water, so as to facilitate the reminder. After the seedlings are irrigated with water, seedlings are strictly controlled and the watering is strictly controlled. Soil should be loosened to improve the ground temperature, maintain the soil moisture content so as to properly control the effects of stems and leaves, and promote the accumulation of traits in the body. When the root system grows to the size of the walnut, the seedlings should be completed. The application of 15 kg of urea per acre or 1,000 kg of human fecal urine is required. Fruit and water must be abundant in fruit period, and top dressing 1-2 times. Each time, about 10 kilograms of urea is applied per acre, or urea and potassium dihydrogen phosphate are used for foliar spray. The water is usually poured every 7 days or so. However, the top-dressing irrigation should be uniform and cannot be ignored. Otherwise, it is prone to empty fruit or umbilical rot.
125mm Traffic Light Module
125mm red green 24v Traffic Light Module
This is a new and exclusive product of our company. It can be used in driving school to simulate real traffic lights.This can be also used as your indoor or outdoor decorations and a small gift for your lovely children!
MODULES TO SUITS 125mm red green 24v Traffic Light Module FEATURES
Simple to replace and install in existing 125mm led Traffic lights module.
12-24VDC or 85-265VAC voltage rated.
Highly durable poly-carbonate housing, high-brightness led beads.
Double lens for even light distribution,waterproof material,good effect.
3 Year Replacement Warranty.
P20 Outdoor Led Display Module,Red Green Traffic Light,Powered Traffic Light Module ,Traffic Control Module
Shenzhen Wide Way Optoelectronics Co., Ltd. , https://www.wdmtrafficlight.com