Climatic characteristics of long summer.

The climatic characteristics of each solar term are different, so what are the climatic characteristics of the long summer solar term? Let's have a look.

Climatic characteristics of long summer

Every year around the first day of April (between May 5 and 6 of Gregorian calendar), when the sun reaches 45 degrees of the Yellow Meridian, it is the long summer solar term of the lunar calendar. The bucket refers to the southeast, and the dimension is long in summer. Everything has grown to this day, hence the name Long Summer. ? At this time, the longitude of the sun is 45 degrees. Astronomically, Chang Xia said that bidding farewell to spring is the beginning of summer days. When the temperature rises obviously, the summer heat comes, thunderstorms increase and crops enter the peak season, people are used to taking long summer as an important solar term.

Climatic characteristics

Solar term temperature

According to the standard of climatology, summer begins when the average temperature of that day rises above 22℃. Long summer? Before and after, only the area south of Fuzhou-Nanling Line really entered the summer in China, while some areas in the northeast and northwest just entered the spring, and the average temperature in most parts of the country was around 1820℃.

The temperature in the rest of South China is about 20℃; The low-altitude valley felt hot in summer as early as mid-April, and the temperature in long summer was above 24℃.

Rainwater characteristics

After the long summer, Jiangnan officially entered the rainy season, and the rainfall and rainy days increased significantly. Continuous rainy days not only caused wet damage to crops. It will also cause the prevalence of many diseases. The heading and flowering period of wheat is the most susceptible period to scab. If warm but rainy weather is expected in the future, close attention should be paid to spraying chemicals from the early flowering period to the full flowering period.

Cotton in southern China often causes outbreaks of anthracnose, damping-off and other diseases under the weather conditions of continuous rain or sudden warming and cold, resulting in a large area of' dead seedlings and lack of seedlings'. Necessary measures to increase temperature and reduce humidity should be taken in time, combined with chemical control to protect seedlings and strive for strong seedlings.

? Grow a variety of seedlings in summer, and Man Cang will reap more millet? Around the long summer, it is the red season of early rice transplanting in the north and south of the Yangtze River. ? Can you plant full-moon seedlings without cutting the full-moon grass? At this time, the temperature is still low, so it is necessary to strengthen management immediately after planting seedlings, topdressing early, ploughing early, controlling insects early and promoting early development. Pay close attention to tail sweeping when sowing mid-season rice.

At this time, the spring shoots of tea trees develop fastest. If you are not careful, tea will age. What is the so-called? Grain Rain seldom picks them, but Chang Xia never stops picking them? , concentrate on, batch assault mining. Before and after the long summer, the temperature in North China and Northwest China rose rapidly, but the precipitation was still not much. In addition, the wind is strong and evaporation is strong in spring. Atmospheric dryness and soil drought often seriously affect the normal growth of crops.

Especially, the dry hot wind before and after wheat filling and milk ripening is an important disastrous weather that leads to yield reduction, and timely irrigation is the key measure for drought resistance and disaster prevention.

? Long summer hoes are everywhere for three days? Weeds grow quickly at this time. If you don't mow the grass for a day, you can't finish it in three days. ? Intertillage weeding can not only weed, resist drought and prevent waterlogging, but also increase the ground temperature and accelerate the decomposition of soil nutrients, which is of great significance to promote the robust growth of crops such as cotton, corn, sorghum and peanuts at seedling stage.

After the long summer, it is the key period for planting early rice in a large area, and the arrival and amount of rain during this period are closely related to the future harvest. The agricultural proverb is well said: in the long summer, the plows and rakes hang high. ?

? There is no rain in the long summer and no rice in Shantou. ? There is also a folk custom of weighing and fearing the heat in summer. Jiangxi also has the custom of drinking tea in long summer, saying that if you don't drink long summer tea, you will feel uncomfortable all summer.