What season is the summer solstice? What season does summer solstice mean?

1 and summer solstice are the earliest of the 24 solar terms. In the 7th century BC, the shadow of the sun was measured by civil soil gauge, thus the summer solstice was determined. The annual summer solstice begins on June 2nd1day (or 22nd) and ends on July 7th (or 8th). According to "Zunxian Manuscript", "The sun arrives in the north, the days are long and the shadows are short, so it is called the summer solstice. At best, it is excellent. " On the day of summer solstice, the sun directly reaches the northernmost part of the year, almost directly to the Tropic of Cancer (23 26 north latitude), and the daytime in the northern hemisphere is the longest, and the farther north it goes, the longer it is.

2. For example, the daily length of Haikou in Hainan is a little over 13 hours, Hangzhou is 14 hours, Beijing is about 15 hours, and Mohe in Heilongjiang is more than 17 hours. From summer to the future, the position of direct sunlight on the ground gradually moves southward, and the daytime in the northern hemisphere is shortened day by day. There is a folk proverb that "eating noodles on the solstice in summer will shorten the day". At this time, the southern hemisphere is in the middle of winter.

3. In ancient China, the summer solstice was divided into three phases: "The first phase of staghorn dissolution; Second, wait for cicadas to start singing; Third-class Pinellia ternata. " Although Mi and Lu belong to the same family, the ancients thought they belonged to Yin and Yang. The deer's horn faces forward, so it belongs to Yang. On the solstice of summer, Yin Qi was born, and Yang Qi began to decline, so the front antlers began to fall off. Because mi belongs to yin, it falls in the corner of winter; After the solstice of summer, the male cicada fluttered and sang because of Yin Qi's feeling; Pinellia ternata is a shade-loving herb, named after it was born in swamps or paddy fields in midsummer. It can be seen that in the hot summer, some yin-loving creatures began to appear, while positive creatures began to decline.

4. China folks divide 15 days from summer to the future into three "hours", usually the first three days, the middle five days and the last seven days. During this period, the temperature in most parts of China was high, the sunshine was sufficient, the crops grew rapidly, and the physiological and ecological water demand was high. At this time, precipitation has a great influence on agricultural output. There is a saying that raindrops from summer solstice are worth thousands of dollars. In general, the precipitation in the middle and lower reaches of the Yangtze River and Huanghuai area can generally meet the requirements of crop growth. The Chronicle of Jingchu's Age says: "It rained on June 3rd, and the Tian family thought it was sweet, and the whole city congratulated each other." It can be seen that as early as 1000 years ago, people had a clear understanding of the characteristics of this rainfall. From summer to around, early rice heading and flowering in the south of Huaihe River, the field water management should be full of water heading, wet irrigation and dry-wet alternation, which not only meets the water demand of rice fruiting, but also can ventilate and raise roots, ensure maturity and improve grain weight. As the saying goes, summer broadcast is not allowed to take a lunch break, so we should pay close attention to summer broadcast, strengthen the management of broadcast content, and strive for full seedlings. After the seedlings emerge, they should be spaced, fixed and transplanted in time to make up for the deficiency. During the summer solstice, all kinds of weeds in farmland grow as fast as crops. They not only compete with crops for water, fertilizer and sunlight, but also parasitize various germs and pests. Therefore, the agricultural proverb says: The solstice in summer is like being bitten by a poisonous snake. Grasping intertillage and hoeing is one of the important measures to increase production from summer solstice. Generally, cotton has germinated, and its vegetative growth and reproductive growth are vigorous. Attention should be paid to ridging, intertillage and ridging in time, and ditch cleaning and drainage should be done in the field in rainstorm areas to prevent the harm of waterlogging and rainstorm. "However, the summer solstice is not hot." "The summer solstice is already three years old." Although the summer solstice indicates that the hot summer has arrived, it is not the hottest time. After the summer solstice, the temperature will continue to rise for some time, and about twenty or thirty days is the hottest weather.

After the summer solstice, due to the vigorous growth of crops, the rapid growth and spread of weeds and pests, agricultural production in most parts of southern China entered the field management period, and the plateau pastoral areas began the golden season of flourishing grass, fertilizer and livestock. At this time, the rainfall in the western part of South China increased obviously, which gradually changed the distribution trend of rainfall in South China from the east to the east since the spring. If there is a summer drought, it is generally expected to be lifted at this time.

6. In the past 30 years, large-scale floods occurred in the west of South China in late June, although the frequency was few, but the degree was serious. Therefore, special attention should be paid to preparing for flood control. The summer solstice solar term is the solar term with the largest annual rainfall in eastern South China, which is often controlled by subtropical high in the future, resulting in summer drought. In order to enhance drought resistance and win a bumper harvest in agriculture, it is an important measure to capture and store pre-dormant rainwater in these areas.