Key measures for winter watermelon seedlings (remember collection!)

In winter, the watermelon seedlings should improve the heat preservation and heating measures of the nursery shed, and replace the polyethylene film with polycyanoethylene without drip film. The heat preservation and non-performance are greatly improved, and the shed temperature can be increased by 1-2 degrees. The shed should be equipped with a fire wall or heating. Temporary heating equipment such as furnaces, artificially warming if necessary.

1. Watermelon and rootstock seeds are treated at low temperature to enhance the cold resistance of the seedlings:

The seeds to be germinated after soaking are placed in a freezing environment of about 0 degrees for 24 hours, and then placed under suitable temperature conditions for germination. When the seeds are white, they are treated with -1 degree for 12-18 hours per day . Go to 18 degrees for 12-6 hours for a total of 3-5 days, then the parties will germination under moderate temperature conditions.

2. Strengthen management after grafting:

Within 1 week after grafting, the wound healing stage is maintained at a temperature of 20-30 degrees. When the temperature is lower than 18 degrees at night , artificial warming should be carried out. The grafted seedbed should be strictly sealed for 3-6 days, and the relative temperature inside the bed should be kept 100 %. The first 3 days should be completely shaded, only through the weak scattered light, the fourth The sky gradually saw the light, and gradually ventilated after 6 days. After the 7th day, the shades were removed and the ventilation was increased. The grafted seedlings are adapted to the normal seedbed environment.

3. Strengthen the management of severe weather:

Management during severe weather such as yin, rain, snow and strong cold is an important part of the success of seedlings. Pay attention to the weather forecast and take measures to keep warm before the cold current. In the rain and snow, you must cover the grass with a two-layer film.

When it is cloudy, increase the light as much as possible without causing frost damage. If the bed temperature drops after the exposure, the grasshopper should be uncovered and covered before 3 pm. If the bed temperature drops slightly, you can follow the cover.

Don't expose it for a few days. When there is rain or snow, you should pause in the rain and snow to cover the gap with the grass. If the light is not enough for a long time, you can use the fluorescent lamp to make artificial light.

After a long time, the yin and yin will be slowly carried out, otherwise it will easily cause flashing seedlings or even seedlings. If the seedlings are found to have wilting, they should cover the shade and wait until the melons return to normal. Repeat this several times until it is not wilting. The grasshoppers were all uncovered and then entered normal management.

4 , 7-10 days before planting , increase ventilation, cooling and refining:

15-20 degrees during the day , within the limits of the freeze-free damage of the melon seedlings, try to reduce the night temperature, can be reduced to 8-10 degrees, so that the melon seedlings adapt to the environmental conditions after planting.

In the wintering cultivation, the price before the New Year's Day and before the Spring Festival is the highest. Therefore, we should concentrate on harvesting at these two times, but we should also pay attention to timely harvesting, avoid harvesting too late, aging the pods, and reducing the quality of the products.