Is the increase in rainfall a feature of the autumnal equinox solar terms?

The autumnal equinox solar term is characterized by an increase in rainfall.

The autumnal equinox solar terms are characterized by equal length of day and night around the world, increased temperature difference between day and night, decreased temperature and more rain.

On the day of the autumnal equinox, the sun shines almost directly on the equator of the earth, and the length of day and night is equal all over the world. After the autumnal equinox, the direct sunlight moves south, and the days in the northern hemisphere become shorter, the nights become longer and the temperature drops. After the autumnal equinox, the direct point of the sun continues to move from the equator to the southern hemisphere, and the days in the northern hemisphere become shorter and the nights become longer, that is, the days in a day are shorter than the nights; In the southern hemisphere, the days are long and the nights are short, which means the days are longer than the nights. Therefore, the autumnal equinox is also called the landing point.

The autumnal equinox solar terms are the solar terms that transition from early autumn to late autumn. By this solar term, most parts of the country have begun to enter the cool autumn. The cold air in the south meets the gradually decaying warm and humid air, and the rainfall will take away the heat on the ground and lower the surface temperature. Therefore, after the autumnal equinox, the weather will gradually cool down and the temperature difference at night will gradually widen.

Agricultural activities of autumnal equinox and solar terms

The characteristics of rapid cooling in autumn make "Sanqiu solar terms for health" particularly tense in the busy autumn harvest, autumn ploughing and autumn planting. The autumnal equinox is a good time to harvest cotton and tobacco leaves from green to yellow. Winter wheat has been planted in North China, and the Yangtze River basin and vast areas in the south are busy harvesting late rice and ploughing the land to prepare for rape sowing.

Drought and lack of rainfall or continuous rainfall in autumn equinox are the main unfavorable factors affecting the normal operation of Sanqiu, especially the continuous rainfall will make the upcoming crops lodging, mildewing or sprouting, resulting in serious losses.

"Sanqiu" is a great help, and the word "early" is the key. Timely harvest of crops in autumn can avoid the harm of first frost and continuous rain, and timely sowing of crops in winter can make full use of heat resources before winter, cultivate strong seedlings to survive the winter safely, and lay the foundation for high yield in the coming year.