The Spring Festival is getting farther and farther away, and now that the holiday is over, most of all walks of life have gone to work and business, and this year is over. Soon we will have the second solar term of the year, which is rain. The 2024 rainy season is at 12:13 on February 19.
Before the Spring Festival this year, the temperature was generally low in various places, and people who returned to their hometowns before the year suffered from heavy snow, rain and other bad weather, and many people were trapped on the highway because of heavy snow, delaying the pace of returning home for the New Year. However, after approaching the Spring Festival, until now, the weather in most places is relatively good, and the temperature is not low.
Now that it is the rainy season, with the arrival of a new round of cold waves, many places will usher in a big cooling weather. According to **, most of the central and eastern parts of China will have a sharp cooling from west to east and from north to south, and the average or minimum daily temperature will generally drop by 8 12. Among them, the cumulative cooling range in the eastern part of Northeast China and some areas in Hubei, Hunan, and eastern Guizhou can reach more than 20.
Like Henan, where the author is currently located, the temperature has not been low in recent days, with a maximum of nearly 20 degrees Celsius during the day, and from the beginning of the rainy season, it will not only cool down greatly, and the maximum temperature will be directly close to 0 degrees Celsius, but also rain and snow.
The meaning of the rain festival is the beginning of rainfall, so it is normal for rain and snow to occur during the rain season, and the suitable precipitation is conducive to the growth of crops. As the saying goes, "the rain falls, and the gloom is so gloomy that it rains in the valley", if there is rain during the rainy season, it indicates that the spring rain is more abundant, and the crops do not lack water.
However, although the large-scale rain and snow weather after this year's rainy season has made the crops water-sufficient, the ensuing large cooling is likely to bring low temperature frost damage. Due to the relatively large cooling range in various places, the temperature in many places has generally dropped by 8 to 12 degrees Celsius, and some places will cumulatively cool down by 20 degrees Celsius, which is already in line with the characteristics of "inverted spring cold".
The so-called "inverted spring cold" refers to the phenomenon that occurs after the beginning of spring, when the early stage is warm and the later period is cold, and the temperature in the later period is significantly lower than that of normal years. Now it is the beginning of spring, although the north is still relatively cold, but the south has gradually entered the spring ploughing period, this time the temperature is greatly reduced, even if it is a cold spring.
The cold spring often adversely affects agricultural production. In the north, the temperature is high in the early spring, the wheat grows vigorously, and suddenly suffers from strong cooling, with a cooling range of 7-9 degrees Celsius within 24 hours, and even more than 10 degrees Celsius, which is prone to frost damage.
Agricultural experts said that the prevention of spring cold in northern wheat can be started from the following aspects: first, irrigation before the cold snap, that is, irrigation before frost, can effectively reduce the amplitude of ground temperature and prevent frost damage; The second is to increase the application of organic fertilizer and fertilize the soil to create a good foundation for the growth and development of wheat and realize the frost resistance of wheat plants.
In the south, the cold spring will also cause rape leaves to be frozen and petioles to be broken, and the corresponding treatment measures are to remove frozen leaves and broken branches in time after snow and freezing rain, and apply fast-acting nitrogen fertilizer to promote lateral growth, and most of them can still return to normal growth.
As for aquaculture, animal husbandry and agricultural greenhouses, positive measures should also be taken to prevent frost and freezing and other cold protection, so as to minimize losses. In particular, agricultural greenhouses should be cleaned up in time to avoid crushing greenhouses and causing serious losses.