When is the annual canopy?

What's the date of the canopy? What's the date of the annual awning?

On June 5th, 6th or 7th every year, the bucket handle of the Big Dipper points to the fourth position (due south by east) and the sun reaches 75 degrees.

Miscanthus, "Miscanthus" refers to some crops with awns, such as rice, millet and millet. "Seed" refers to "seed" and "seed" used for sowing. The meaning of awn seed is: grain crops with awn can be planted, and then they will fail, so it is named "awn seed". Season: summer. Climate characteristics: strong sunshine, abundant rainfall and significant temperature rise. Agriculture: planting cereal crops such as rice.

In the awning season, the temperature rises obviously, the rainfall is abundant, and the air humidity is high, which is suitable for planting cereal crops such as late rice. The solar term of awn seed is the dividing point of planting crop opportunity. Because of the hot weather, it has entered a typical summer, and agricultural sowing is bounded by this season. After this solar term, the survival rate of crops is getting lower and lower. Ear planting is the season for planting cereal crops, and late rice should be planted at this time. In southern rice areas, "awn seed" is the peak season for transplanting rice. The northern region is dryland agriculture, and wheat is the main food crop. This season is the harvest season of the northern summer crop wheat. The arrival of "Mangzi" marks another round of busy farming. People in the south are busy transplanting rice seedlings and harvesting wheat in the north.

The word "ear seed" was first seen in the book Zhou Li in the Han Dynasty: "Grass grows, ear seeds grow." Zheng Xuan in the Eastern Han Dynasty explained: "Grass is born, and its land can be planted with awn seeds, awn seeds, rice and wheat." Yuan Wucheng's book "The Seventy-two Seasons of the Moon Order" said: "The May Festival means that there are awns in the valley." In the book, awn seed literally means "rice and cereal crops with awns can be planted". Rice cultivation is generally in the southern region where paddy fields are dominant. The northern region is dryland agriculture, and wheat is the main food crop. For the northern region, "awn seed" is the season when wheat matures, so the meaning of "awn seed" is also interpreted as "the wheat with awn is about to be harvested, and the rice with awn can be planted". Wheat harvest increased, including rice sowing in the south and wheat harvest in the north.

Climatic characteristics of Miscanthus;

Precipitation: The precipitation in China is mainly brought by the southeast monsoon, which brings water vapor from the ocean to China. The southeast coastal areas of China will first get the water vapor brought by the southeast monsoon and form abundant precipitation, which will become the region with the richest annual precipitation in China. Southwest monsoon also brings precipitation to China, which can affect South China. When the southwest monsoon develops strongly, it can also go deep into the Yangtze River basin. The rainy season in the south is from April to September, and the rainy season and the hot month are synchronized. Typical "rain-heat synchronization" climate characteristics in tropical and subtropical areas of southern China.

Because the precipitation in China is mainly formed by the water vapor brought by the southeast monsoon, influenced by the summer monsoon, the precipitation gradually decreases from the southeast coast to the northwest inland. The northern part of China has not yet entered the rainy season. Every year from late July to early August (called "seven falls and eight liters") is the rainy season in North China, Northeast China and other northern regions; Northwest China, because it lives inland and is far away from the ocean, has become the arid area with the least annual precipitation in China. Judging from the seasonal distribution of precipitation, the southern part of China is a typical rainy and high temperature period. Precipitation in North China, Northeast China and other areas is mainly concentrated in the late July to early August of the Gregorian calendar (probably from the summer heat to beginning of autumn). Although the rainfall period is short and the rainfall is small, it also has the characteristics of "rain and heat synchronization" and belongs to the "rain and heat synchronization" climate. The rainy and hot season is synchronized with the rain and heat, and high temperature and high humidity are beneficial to crop growth.

Monsoon climate is the main feature of China climate. In summer, affected by the warm and humid air flow from the ocean, many places in China are hot, humid and rainy. Qinling-Huaihe River is a transitional zone between rainy south and rainy north. From the vicinity of Huaihe River in Qinling Mountains to the north, the rainfall decreased sharply. In the solar terms of awn species, the monsoon rain belt in the southeast of South China is stable, the south of the Yangtze River enters the rainy season, and the southwest enters the rainy season of the year from June. Usually from the beginning of the summer solar term (late July), the northern part of China has entered the period with the most rain in the whole year.

Temperature: In awning season, the temperature rises obviously and it is sultry. Especially in the south, hot and rainy weather is frequent and the air humidity is high. In Fujian, Guangdong, Guangxi, Hainan, Taiwan Province and other places in South China, the temperature in June is generally above 30 degrees. If it was before the thunderstorm, the air humidity was high, and it was really stuffy and hot. Whether in the south or the north, there is the possibility of high temperature weather above 35℃. During this period, except for the Qinghai-Tibet Plateau and the northernmost part of Heilongjiang, people in most areas can generally feel the summer heat. The common weather disasters in the heading season are tornadoes, strong winds and heavy rains.