A strong cold wave is coming! Shandong will welcome the coldest temperature since the beginning of winter!

Shandong province's meteorological observatory issued a yellow alert for a cold wave and an orange alert for strong winds at sea at 16:00 on November 27. A strong cold wave is expected to hit our province from 28th to 30th. The temperature drops sharply, with the temperature dropping range of 14 ~ 18℃ in most areas of the province and up to 20℃ in some parts. The lowest temperature appeared in the morning of 30th, with -12 ~ -10℃ in northwest and central Shandong, -5 ~ -3℃ in coastal areas, and -8 ~ -6℃ in other areas.

From the night of the 28th to the morning of the 30th, the northerly wind, Bohai Sea, Bohai Strait, the northern and central parts of the Yellow Sea, 7 to 9 gusts of 10 to 11, peninsula area and inland lake area of 6 to 7 gusts of 8 to 9, Binzhou, Dongying, Weifang and Rizhao 5 to 6 gusts of 7 to 8, other areas of 4 to 5 gusts of 6 to 7.

This strong cold wave will bring the lowest temperature since the beginning of winter in Shandong Province, with strong wind and heavy snow in the northern part of the peninsula. It will have adverse effects on transportation, offshore production, energy supply, outdoor operations, agricultural production and epidemic prevention and control. Please take precautions.

Matters needing attention in greenhouse

1. Anti-freezing and warm

Close the greenhouses and cover them with grass mat or other coverings. In order to prevent rain and snow from wetting the grass mat, cover them with a thin film. Where conditions permit, multi-layer coverage should be adopted, and plastic sheds or small sheds should be built in the shed. In snowy weather, the snow on the greenhouse should be cleared in time to prevent the heavy snow from collapsing the greenhouse.

2. Timely cover and collect

Vegetables with weak cold resistance, such as Chinese cabbage, should be tightly tied to the waist and anti-freezing measures should be taken. Sun shade nets can also be used to cover the floating surface of heat preservation, and vegetables that may be frozen should be promptly collected, stored indoors and marketed in batches.

3, timely soil cultivation, reasonable topdressing

At the end of cold weather, loose soil should be cultivated in time to improve soil temperature and protect roots. If possible, it is feasible to scatter a thin layer of rice husk ash and plant ash. At the same time, nitrogen fertilizer should be controlled, and the amount of nitrogen fertilizer should be reduced appropriately in the seedling stage, and the application of nitrogen fertilizer should be avoided in order to improve the resistance. Besides, attention should be paid to foliar fertilization. After clearing up, vegetables can be sprayed with 0.2% potassium dihydrogen phosphate solution 1-2 times to enhance the frost resistance.

4. Use the lamp to increase the light and temperature

The solanum and melon seedlings cultivated in the greenhouses should be well insulated from the cold and keep warm. Under the condition of extremely low temperature, lamps can be added to enhance light and temperature to promote growth. Low temperature seedbed to control watering, so that the nutrient soil is not white do not water. Conditional use of electric heating wire heating facilities, and timely build a small arch shed, covered with non-woven fabric. To be sown melons and vegetables seedlings, should avoid cold injury, by increasing the ground temperature and other measures after sowing.