1.Improve the insulation and temperature-raising measures for nursery sheds. Replace polythene film with poly vinyl cyanide non-drip film. The heat preservation and no performance are greatly improved. The temperature of the shed can be increased by 1–2°C. There should be a fire wall or furnace in the shed. And other temporary heating equipment. Artificial warming is performed when necessary.
2. Cold treatment of watermelon and rootstock seeds to enhance the cold resistance of the seedlings
The seeds to be germinated after soaking are placed in a frozen environment at about 0°C for 24 hours, and then germinated at a suitable temperature. When the seeds are whitened, they are treated with -1°C per day for 12 to 18 hours. Turn to 18 °C for 12 - 6 hours for a total of 3 - 5 days, then all parties germinate at moderate temperature.
3. Strengthen the management after grafting: In the first week after grafting, it is the stage of wound healing, and the temperature of the greenhouse should be maintained at 20-30°C. When the temperature is lower than 18°C ​​at night, the temperature should be artificially increased. Grafting seedbeds should be tightly sealed for 3 to 6 days. The relative temperature within the bed should be kept 100%. The first 3 days should completely cover the shade, and only diffuse light can be transmitted through the faint light. Gradually saw light for 4 days, gradually ventilated after 6 days, and removed obstructions and increased ventilation after 7 days. The grafted seedlings were adapted to the normal seedbed environment.
4. Strengthen the management of severe weather: Pay attention to listening to the weather forecast and take measures to increase the temperature of the insulation before the cold current. In rain and snow, two layers of film must be placed on the grasshopper. When it is cloudy, increase the lighting as much as possible without causing freezing damage. If the bed temperature drops after exposing, you should uncover the straw and cover it before 3 pm. If the bed temperature drops slightly, follow the cover. Do not expose squats for a few days. When there is rain and snow, pause in the rain and snow to expose the gaps. With prolonged lack of light, fluorescent lights can be used to artificially fill light. After a long period of haze and sunshine, the exposing process must be carried out slowly. Otherwise, it is easy to cause flash or even down seedlings. If the seedlings are found to have wilting phenomenon, they should be covered with shading immediately. Repeat this several times until it is not wilting. Then all the grasshoppers were uncovered and then entered into normal management.
5. 7 to 10 days before planting, increase the amount of ventilation, cooling seedlings: 15-20 °C during the day, within the limits of frost damage from melon seedlings, try to reduce the night temperature, can be reduced to 8 - 10 °C, Make melon seedlings adapt to the environmental conditions after planting.
Men's Sex Toys,Adult Sex Toys,Men Massage Anal Vibrator,Men Sex Plug Ass Toys
Shenzhen Dongchen Hey E-commerce Co.,Ltd. , https://www.xxsexytoy.com