Huangli Qingyijiang

The Millennium is the first solar term in August, and it is a sign that the weather turns cold. In agricultural production, this is the peak season for vegetable production. Then today's calendar will introduce you to the agricultural knowledge around the Millennium and the importance of the Millennium to agriculture.

There is a saying in our country's folk agricultural proverb: "White dew is fascinating, and the autumn equinox rice is beautiful." This means that if there is dew before and after the white dew, the late rice will have a good harvest. In addition, after entering the Millennium season, South China has obvious characteristics of sudden drop in temperature, beginning of rain in Mao Mao and sudden drop in sunshine, which profoundly reflects the seasonal transition from summer to autumn.

The average temperature in South China during the perennial white dew is about 3℃ lower than that in summer, and the average temperature in most areas has dropped below 22℃. According to the standard of dividing four seasons by climatology, the time series begins to enter autumn. The autumn rain in South China mostly occurs from the white dew to the first frost, most in the middle and lower reaches of Minjiang River and Qingyi River, and relatively less in the central part of South China.

Therefore, there is also an agricultural proverb that "if you overuse it for a thousand years, you will walk once a day." Although it is impossible to make a weather forecast according to whether it will rain on the day of the Millennium, there are often rainy days around the Millennium Festival. Moreover, since then, the rainfall in South China has been characterized by low intensity, frequent rainy days and continuous rainfall. Accordingly, the sunshine in the white dew period in South China is reduced by about half compared with that in summer, and this decreasing trend continues until winter.

The above-mentioned climatic characteristics of the white dew season are not conducive to heading and flowering of late rice, but also affect the harvesting and sunning of middle rice, so there is a saying in the agricultural proverb that "the white dew is clear and the rice is as white as silver". Only by fully understanding the climate characteristics of the Millennium and taking corresponding agricultural technical measures can the harm of autumn rain be alleviated or avoided. On the other hand, we should also seize the rain to store water, especially the Bailu in eastern South China is another solar term with more rainfall after Xiaoman and summer solstice, so don't miss the good opportunity.