frost is the 18th of the 24 solar terms, and autumn is coming to an end. The frost term indicates the arrival of winter, and the climate will naturally change greatly. Then this issue of the old yellow calendar will take you to know what the climatic characteristics of frost fall are.,
the climatic characteristics of frost fall. The frost term is generally before and after October 23 of the Gregorian calendar every year. At this time, the cold air goes south, the weather is getting colder and colder, and the temperature difference between day and night in southern China changes greatly; The temperature in some parts of the North has dropped below 0 ℃. For example, the average temperature in the north of Northeast China, the east of Inner Mongolia and most of the Northwest has been below 0 ℃, and the average temperature in the South with southern latitude is mostly about 16 ℃.
the main climate feature of autumn is dry, and the temperature gradually turns cold. After frost, the temperature difference between day and night is greater, the weather is very cold in the morning and evening, and it is relatively hot at noon. Autumn dryness is obvious. After the frost, the plants gradually lost their vitality and the earth was bleak.,
and "frost falls, dew knot becomes frost", but from a scientific point of view, the statement of "dew knot becomes frost" is inaccurate. The frozen dew formed by freezing dew drops is a small hard ice bead. Frost refers to the phenomenon of crop freezing damage caused by sharp temperature drop, and its damage temperature varies with crops, varieties and growth periods; To form frost, the temperature of the ground or ground object must be reduced below 0 ℃, and the moisture content in the air in the stratum must reach a certain degree.
therefore, frost does not necessarily occur when frost occurs, and frost does not necessarily occur when frost occurs; However, because the temperature at the time of frost is relatively low, it is easy to cause frost if it continues to cool.and
farming songs of frost. Frost began to fall before and after frost, and wheat sowing was busy in some places. Early sowing of wheat, quick check and supplement to ensure that the seedlings are neat and strong. Glutinous rice is being harvested at this festival, and sweet potatoes are being cut, dried and stored fresh. Cotton should be picked carefully, and all the trees and underground should be picked up. In late autumn, the harvest was carried out everywhere, firewood and grass were stacked and grain was stored. Take good care of the fruits and vegetables in the greenhouse, topdressing and watering to prevent insects, green onions and radishes are collected one after another, and cabbage is gathered to help. Repair the leaky circle in the open shed quickly to prevent the animals from catching cold. Fasten the animals and circle the pigs, and the wheat seedlings will be affected. Catch adult fish and sell them on the market. Lotus root, reed, Pu thicken and harvest are busy. Rodent infestation in urban and rural areas will be eliminated together, so as to prevent epidemic diseases and ensure food security. Recommended byand
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