What will the weather be like after the first frost? What does the first frost mean?

What does the first frost mean? Interpretation of the first frost: The cold weather and the appearance of the first frost mean the beginning of winter. The first frost, the eighteenth of the twenty-four solar terms, is the last solar term in autumn and the transition from autumn to winter. The first frost is the last solar term in autumn. In autumn, the spleen and stomach are the foundation of the day after tomorrow. At this time, it is appropriate to make up for it, especially to strengthen the spleen and nourish the stomach to make up for the day after tomorrow. Frost is spread all over vegetation and rocks, commonly known as frosting. Frosted vegetables such as spinach and wax gourd are particularly delicious, and frosted fruits such as grapes are particularly sweet. The first frost solar terms are characterized by cold weather in the morning and evening, hot weather at noon, large temperature difference between day and night, and obvious autumn dryness. Because "frost" is a manifestation of cold weather and large temperature difference between day and night, it is named "first frost" to indicate that "the temperature drops suddenly and the temperature difference between day and night is large". The first frost solar terms mainly include the customs of enjoying chrysanthemums, eating persimmons, climbing high and overlooking, and tonic. The first frost season is the turning point of autumn and winter climate, and it is also the transition of the spirit of the sun from being hidden. The key to health care should pay attention to "keeping out the cold outside and clearing heat inside". There is a folk saying that it is better to make up the first frost in winter. In autumn, the spleen and stomach are the foundation of the day after tomorrow. At this time, tonic is appropriate, especially strengthening the spleen and nourishing the stomach to nourish the day after tomorrow. Shanxi, a peasant proverb from all over the world: it's time to grasp autumn ploughing in the cold dew, but autumn harvest and autumn planting are not relaxed. Picking cotton, planing potatoes, returning wheat and watering in autumn are going on very quickly. Water afforestation to collect feed and exchange yam seeds in different places. Hebei: first frost and cold dew, harvesting soybeans. Pay close attention to the battle and put it in storage in time. Late-crop wheat, surprise sowing. Harvest the grass so that you can feed the animals. Spinach and rape, plant a few acres. Next spring, you can harvest early. Shandong: As soon as the first frost arrived, it turned cold. Catch the harvest, sweet potatoes and peanuts. Cut the melon while the weather is fine. Sweet potatoes can't relax when they enter the cellar. Check carefully the seedling situation in the wheat field. Lack of seedlings and broken ridges, replanting in time. Xinjiang: cold dew in October, first frost, crisp autumn air and cool autumn wind. The first frost in northern Xinjiang is in the early stage, and the first frost in southern Xinjiang is autumn frost. Pay close attention to autumn irrigation and winter irrigation, and quickly store the fruits of labor. Livestock are fattened and propagated, and forage is transported to winter fields. Jiangsu: There is no green rice in the cold dew, and the first frost falls together. Shanghai: In October, the cold dew welcomes the first frost, and the autumn harvest is busy in winter. The late rice threshed cotton turns over and basks in the sun, and the harvest is fine. Anhui: Harvest in cold dew, and the first frost will turn over the ground. Hunan:/kloc-frost arrives in early October, harvesting late rice and digging potatoes. Fujian: The cold dew and frost come in October, and the fragrant rice is yellow. The winter planting plan is full of fat and tool rice is added. What will the weather be like after the first frost? 1. Climate characteristics 1. The grassland in the northern part of the Yellow River is covered with yellow leaves, and locusts droop in caves and go into hibernation. 2. The average temperature in Northeast China, East Inner Mongolia and Northwest China is below 0℃, the soil freezes, and crops stop growing in winter and enter winter. 3. The climate in the middle and lower reaches and south of the first frost region of the Yangtze River is still mild, with an average temperature of about 16℃. The fields are covered with onions, orange yellow and orange green, and autumn chrysanthemums compete with blooming hibiscus flowers. 4. The first frost in China is gradually delayed from north to south and from mountainous area to plain. 2. Agricultural activities 1. During this period, most areas in the north harvest in autumn. I can't even stand cold-resistant onions because "the first frost can't afford onions." The longer the time, the more empty it is. " Chinese cabbage in North China is about to be harvested, and farmers need to strengthen post-management The Yangtze River is in the middle, lower reaches and south of this area. Winter wheat and rape should be sown, intertilled and weeded in time to control aphids. 2. In the south, this time is the peak season of Sanqiu. Harvest single-season hybrid rice and late rice, sow early buckwheat, plant rape early, pick cotton, pick cotton stalks and cultivate land. "The straw is full, and there will be fewer pests and diseases in the coming year." After harvest, the straw and root system should be restored in time, because there are many overwintering eggs and bacteria in it. Deep tillage is beneficial to reduce the accumulation of reducing harmful substances, thus maintaining the health of the soil. In addition, most areas of our country have entered the dry season, so we must attach great importance to forest fire prevention. 3. At the same time, the first frost is also a good time to raise sheep in Huanghuai Valley. "The first frost gives birth to clear milk, and when the grass appears, it will catch up." ewes generally estrus in autumn and winter, and the time for receiving rams continuously is generally about 30 hours. Just like the Bailu culture in the south, the lambs are warm at birth, the grass is fresh, the ewes are well nourished and have enough milk to be milked. Don't forget to prevent frost in autumn harvest. Plant as early as possible and stagger planting in the deep frost period. Try to use early-maturing and high-yielding varieties. Often watered, dry soil dissipates heat faster than wet soil, and crops are more vulnerable. Smoke can form insulating clouds in a small area to reduce freezing damage; Frequent squatting will increase the ground temperature; Apply humic acid or phosphate fertilizer to make crops mature ahead of time. In addition, the use of greenhouse can protect crops from freezing injury to a greater extent. "The greenhouses and vegetables are properly managed, and chemical fertilizers are poured to prevent insects." Greenhouse can not only resist natural disasters, droughts and floods, but also advance or postpone farming, prolong the growth period of crops, achieve the purpose of early or late maturity, and improve yield and stability. In the first frost season, greenhouse vegetables (such as tomatoes, cucumbers, eggplant, peppers) should be heated and watered in autumn, and harvested in time. We should strengthen the management of refrigerated vegetables, such as celery, lettuce, rapeseed and radish, and carry out water and pest control. This is the climatic characteristics and agricultural activities before and after the first frost. After the first frost, because the climate gradually turns cold, once the ground or ground temperature drops below 0℃, it is easy to form frost, which will cause freezing damage to crops with poor cold resistance such as wheat and rape. Farmers should pay attention to it.