Does long summer represent summer? What are the characteristics of the climate?
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Does the long summer mean the arrival of summer? Yes, the long summer means that summer will gradually enter people's lives. The temperature is getting higher and higher and the days are getting longer and longer. Summer clothes and other cool clothes are becoming more and more popular. In the vast rural areas, on the one hand, spring crops will grow vigorously, on the other hand, preparations for summer harvest will begin, granaries will be swept away and endless grains will be dumped. In the southern region, all kinds of vegetables are mainly planted at this time. Health care in this world is mainly to adapt to weather changes, mainly to supplement, especially to supplement qi and blood to adapt to the rise of yang. China is used to long summer as the beginning of summer, and the summer in meteorology will be postponed to 25 days longer than that in Xia Hou. The ancients counted April, May and June of the lunar calendar as "summer"; Today, people regard June, July and August of the solar calendar as "summer". Westerners usually say that the summer of solstice is divided into summer. In the southern hemisphere, 65438+ February, 65438+ October and February are usually designated as summer. The scientific division method is that the average temperature above 22℃ is "summer". Accordingly, when the average temperature keeps below 22℃, summer is over.
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What are the climatic characteristics of long summer? After the long summer, the area south of the Yangtze River 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 lead to the prevalence of many diseases. Wheat is susceptible to scab at heading and flowering stage. If warm but rainy weather is expected in the future, it is necessary to pay close attention to spraying chemicals from the beginning of flowering to the full flowering period. Cotton in southern China often causes outbreaks of anthracnose, damping-off and other diseases, 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, so as to protect seedlings and strengthen them. "Planting more rice in the long summer and harvesting more millet in Man Cang", it is the red season of early rice planting in the north and south of the Yangtze River around the long summer. You can plant full-moon seedlings, but don't cut the full-moon grass. At this time, the temperature is still low. After planting seedlings, you should immediately strengthen management, topdressing early, ploughing early, controlling pests early and promoting early development. When sowing mid-season rice, we should pay close attention to the tail sweeping. At this time, the spring shoots of tea trees develop rapidly, and if they are neglected in management, the tea leaves will age. As the saying goes, "Grain Rain seldom picks, but never picks in the long summer", so we should concentrate our efforts and make surprise gains in batches. 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, at that time, the wind was strong, evaporation was strong, and atmospheric dryness and soil drought often seriously affected 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 Xia San hoes everywhere", and weeds grow rapidly at this time. "If you don't mow the grass for one day, you can't mow it for three days." Intertillage weeding can not only eliminate weeds, resist drought and waterlogging, but also increase ground temperature and accelerate soil nutrient decomposition, which is of great significance to promote the robust growth of cotton, corn, sorghum, peanuts and other crops at seedling stage.
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After the long summer, it is a critical period for planting early rice in a large area. The arrival of rain and the amount of rain during this period are closely related to the future harvest. The agricultural proverb says well: "If you can't keep it in summer, you can't plough high." "There is no rain in the long summer, and there is no rice in the head." There is also a folk custom of weighing for fear of summer heat. It is said that after weighing yourself on this day, you will not be afraid of the heat in summer and lose weight, otherwise you will be troubled by illness. Jiangxi also has the custom of drinking tea in the long summer, saying that if you don't drink tea in the long summer, you will suffer all summer. As early as ancient times, kings often went outside the city to welcome summer on the first day of summer, and the day to welcome summer was to establish summer. "The Book of Rites and the Moon Order" explains the saying of Chang Xia: "Worms grow out of melons, and bitter vegetables are exposed." It shows that frogs began to clamor for the arrival of summer, earthworms were busy helping farmers to loosen the soil, and wild vegetables on rural ridges were also unearthed. In the morning, when people walk in the countryside, fields and beaches in the early summer sunshine, you will feel the deep affection of nature from this mild sunshine. 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.
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