What does the vernal equinox mean?

The vernal equinox, one of the 24 solar terms, is the fourth solar term in spring. The solar calendar reaches 0, and festivals are held on March 19~22 of Gregorian calendar every year. At the vernal equinox, the direct point of the sun is on the equator, and then the direct point of the sun continues to move northward, so the vernal equinox is also called the "ascending equinox". In ancient times, it was also called "Japan-China", "Day and Night" and "Mid-spring Moon".

The vernal equinox is an important solar term, which is of great significance in astronomy: the northern and southern hemispheres divide the day and night equally. In climate, it also has obvious characteristics. Since then, the direct position of the sun has continued to move from the equator to the northern hemisphere. The day in the northern hemisphere began to be longer than the night, and the day in the southern hemisphere began to be shorter than the night.

During the spring equinox, China has entered a beautiful spring scenery except the Qinghai-Tibet Plateau, Northeast China, Northwest China and North China. At this time, the climate is mild, the rain is abundant and the sun is shining, and the wintering crops in most parts of China have entered the spring growth stage.

Extended data:

Busy with spring ploughing

In the northern areas with little rain in spring, we should pay close attention to spring irrigation, water saving and jointing fertilization, and pay attention to preventing late frost and freezing injury; South China still needs to continue to do a good job in drainage and flood prevention.

Early rice seedling raising in Jiangnan and Jianghuai areas has started, and the weather changes frequently in early spring. Attention should be paid to soaking seeds to accelerate germination when cold air comes, and sowing in sunny days when cold air ends.

The experience of the masses says, "A cold tail warms the head, so there is no need to worry about seedlings." According to the weather situation, we should strive for 3~5 sunny days after sowing to ensure that all seedlings are sown at one time. Spring tea has begun to sprout, so it is necessary to apply quick-acting fertilizer to control pests and diseases in time and strive for high yield and high quality tea.