Physical knowledge in the twenty-four solar terms

The physical knowledge contained in the poems of the twenty-four solar terms;

Beginning of spring: "Everything grows around the vernal equinox." This poem reflects the vernal equinox, which is divided equally between day and night. The sunshine time is gradually increasing, the weather is getting warmer and everything begins to grow.

Rain: "February rain is mysterious, dripping waterfalls moisten young crops", this poem reflects the rainy season, and the precipitation gradually increases, which plays an important role in nourishing the growth of crops.

Vernal equinox: "The vernal equinox breeds everything." This poem reflects the vernal equinox season, where day and night are equally divided, the days are long and the nights are short, the sun shines directly on the ground, the ground temperature rises, and everything begins to grow and reproduce.

Qingming: "It rains a lot during Qingming Festival, and pedestrians on the road want to break their souls." This poem reflects that during the Qingming period, the days were long and the nights were short, the temperature gradually rose, and the weather was rainy, which brought inconvenience to people's travel.

Grain Rain: "It rains heavily in Grain Rain, and pedestrians on the road want to die." This poem reflects the gradual increase of seasonal rainfall in Grain Rain, which provides sufficient water for crop growth.

Long summer: "Everything is born in the long summer solar terms", this poem reflects the long summer season, the weather is getting hotter and the crops are beginning to grow sturdily.

Xiaoman: "When May is full, you are not afraid to plant melons without seedlings." This poem reflects that the temperature rises gradually and crops grow rapidly in Xiaoman season, which is suitable for planting melon crops.

Mangzhong: "Mangzhong silkworms begin to spin silk, and farmers are busy harvesting in summer." This poem reflects that during the ear planting season, the temperature is gradually rising, the wheat crops are ripe and harvested, and farmers are busy planting and harvesting summer crops.

Summer solstice: "The sun is born on the summer solstice and the pulse is long." This poem reflects the vigorous development of things.

Summer heat: "The summer heat is the top of the brain, and farmers are eager to harvest." This poem reflects that in the hot summer season, the temperature begins to peak, people need to prevent heatstroke and cool down, and farmers are busy harvesting summer crops.

Summer heat: "The summer heat is coming to an end, and farmers are busy harvesting." This poem reflects that during the hot summer, when the temperature reaches its peak, people need to strengthen heatstroke prevention and cooling, and farmers are busy harvesting summer crops.

Beginning of autumn: "Before and after the autumnal equinox, the cold came, the flowers in bloom fell, and the sun was shining." This poem reflects that at the beginning of autumn, the weather began to get cold, the temperature gradually dropped, flowers began to wither, and some plants growing in the sun began to thrive.

Summer: "It is dry in summer and autumn, and people are prone to get sick, so the cool wind comes to sleep all night." This poem reflects that in summer, although the temperature is still high, it has begun to drop. People need to prevent diseases caused by autumn dryness, and some cool night winds are blowing.

White dew: "The white dew arrives around the autumn equinox, and the flowers and trees in the backyard wither when it is cold." This poem reflects the white dew season, when the weather begins to get cold, dew begins to appear and some flowers and plants begin to wither.

Autumnal equinox: "The weather is changeable in the autumnal equinox, and the west wind is freezing all night." This poem reflects the autumnal equinox season, which is divided equally between day and night, the temperature gradually drops and the weather is changeable. People need to strengthen cold protection and warmth.

Cold dew: "After the autumnal equinox, the leaves of the first frost plane tree fall", this poem reflects the cold dew season, the temperature is lower, the dew has become frost, and some plants begin to wither or even wither.

First frost: "In the first frost season, the atmosphere is cold, and the vegetation is separated by morning frost". This poem reflects that in the first frost season, the temperature is lower, the dew is frosted, and nature begins to enter a dormant period.

Beginning of winter: "beginning of winter, the solar terms are getting colder, and wheat is planted early when there is much snow." This poem reflects that at the beginning of winter, the weather is getting colder and colder, and winter has arrived. At the same time, this snow is very beneficial to the growth of wheat crops.

Xiaoxue: "Xiaoxue frost presses the branches, and the north wind is bleak and worried about old age." This poem reflects the light snow season, the weather is colder, the north wind is whistling, and people need to be cold and warm.

Heavy snow: "the snowy area is white, and everything is fragrant from winter to day." This poem reflects the snowy season, when snowflakes are falling and the world is white. At the same time, it is also the winter solstice season. The sun shines for the shortest time, the days are short and the nights are long, the sunshine gradually increases, and everything begins to come back to life.

Winter solstice: "winter solstice is short and the night is long, and snow hits the door all year round." This poem reflects the solstice in winter, with the shortest sunshine time, short days and long nights, and colder temperatures. People need to be warm and cold.

Slight cold: "slight cold to the bone, heavy snow flying in the breeze year." This poem reflects that in the slight cold season, the weather is colder and the snowfall increases, which is beneficial to crop growth.

Great cold: "Snowflakes fly in the great cold season, and the frozen soil is cold." This poem reflects the severe cold season, when the weather is cold, reaching the lowest point in a year, and even freezing occurs in some areas.