Phenological characteristics of solar terms in autumn equinox

The phenological characteristics of the autumnal equinox solar terms are that when it thunders, it begins to hear sounds, the second insect bites and the third water dries up.

1, the first thunder stops.

The ancients thought that it thundered because the yang was strong and the yin began to flourish after the autumnal equinox, so it stopped thundering. At the autumnal equinox, the Yangtze River basin and its vast areas north of China all entered the autumn divided by "climatic average temperature", and the daily average temperature dropped below 22℃. The cold air mass in the north began to have some influence. The rainy season has just ended in most areas, with a cool breeze blowing gently. Autumn is crisp and the sky is high and the clouds are light.

After the autumnal equinox, the direct sunlight moved to the southern hemisphere, and the northern hemisphere got less and less solar radiation, but the ground lost more heat and the temperature dropped significantly.

2. The second blank household waiting for insects

Some insects unearthed at the vernal equinox will return to the soil after the autumnal equinox to prepare for winter.

3, third-class water dry.

Water vapor is not as abundant as in summer, and it will start to dry up gradually, so people will feel the air is getting drier and drier.

Brief introduction of autumn equinox farming activities

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.