What are the phenological characteristics of autumn equinox weather?

What are the phenological characteristics of the autumnal equinox weather? Day and night are equal, then the direct sunlight position moves further south, and the days in the northern hemisphere are short and the nights are long, and the temperature drops, which is of universal significance in the whole country.

1, the thunder is getting less and less: at the autumnal equinox, Yin Qi began to flourish and Yang Qi gradually weakened, so the thunder began to decrease. This is a phenomenon observed by the ancients, and it is believed that there will be no more thunder at this time.

2. showstopper of stinging insects: refers to some small insects unearthed at the vernal equinox, which will return to the soil one after another after the autumnal equinox to prepare for the winter. This is also a phenological feature of the autumnal equinox season.

3. Water begins to dry up: In autumn, water vapor is not as abundant as in summer, and it begins to dry up gradually, so we will feel the air is getting drier and drier. This is also a natural phenomenon in the autumn equinox.

4. Autumn harvest is one of the important features of the autumnal equinox season. At this time, all kinds of autumn crops are mature, such as rice, corn, soybeans and so on. , need to harvest. When harvesting in autumn, we should also pay attention to the storage and management of crops to ensure their quality and safety.

5. Autumn ploughing is another important feature of the autumn equinox season. At this time, the land gradually becomes dry and soft, which is a good time for autumn ploughing. Autumn tillage can improve the structure and texture of soil, promote the water retention and drainage capacity of soil, and prepare for spring sowing. Autumn farming can also eliminate overwintering eggs and germs and reduce the occurrence of pests and diseases in the coming year.

6. Autumn sowing is another important feature of the autumn equinox season. At this time, the temperature is suitable and the rainfall is abundant, which is a good time for autumn planting. Sowing in autumn can make full use of the light and heat resources in autumn and improve the growth speed and quality of crops. Crops sown in autumn include wheat, rape and vegetables. It is necessary to choose suitable varieties and sowing methods to ensure their growth and quality.

The concept of autumnal equinox and related knowledge

1, the autumnal equinox is an important solar term among the 24 solar terms in China, usually on September 22nd or 23rd of the Gregorian calendar. The name of this solar term comes from the ancient concept of "autumnal equinox", that is, the equal division of day and night and the balance of yin and yang are the beginning of autumn. The arrival of the autumnal equinox marks the official beginning of autumn. The temperature gradually drops, and the weather gradually becomes cool and pleasant.

2. In nature, the autumnal equinox is a day with equal time between day and night in a year, which means that the length of day and night is the same. In this solar term, the temperature is gradually decreasing and the weather is getting colder, but it is still pleasant. At this time, nature began to enter autumn, and everything gradually entered the stage of withering and maturing.

3. In agriculture, the autumnal equinox is a critical period for crop growth and harvest. This solar term is very important for farmers, because it is a key node for crop growth and maturity. In this solar term, farmers begin to prepare for harvesting crops, including rice, corn and wheat. At this time, these crops have entered the late growth stage and are mature enough to be harvested.