During the grain planting season, in May, yellow and June, there are lots of golden grains in the sea. Grain planting is like fish swimming in it. It's very busy. The wheat fields at dusk and the setting sun interweave a dreamlike beauty. Where did this wonderful season come from? What will be its climate characteristics?
The origin of mangrove seed
On June 5 every year, the sun reaches 75 & deg; When it is the mangrove species《 "On May Day, it is said that there are awns to be planted and grains to be planted.". It means that the seeds of barley, wheat and other awned crops have matured, and it is urgent to rush to harvest them. Late millet, millet, millet and other summer crops are also the busiest season for sowing, so they are also called 'mangzhong'.
Competing for the sun in spring and the time in summer means the busy harvest season. It is often said that 'three summers' are busy with the season, that is to say, they are busy with summer harvest, summer planting and spring sowing.
Therefore, 'mang Zhong', also known as' busy planting 'and' busy planting ', is the busiest time for farmers' friends to sow and go to the fields.
What are the three waiting periods of mangzhong
In ancient China, mangrove species were divided into three periods: one was born of mantis, the other was born of Mantis; Second, waiting for Peng to sing; There is no sound in the tongue In this solar term, the eggs of mantis in the late autumn of last year broke their shells and gave birth to small Mantis; The Shrike that likes Yin begins to appear on the branches, and sings when it feels Yin. On the contrary, the antilingual bird that can learn from other birds stops singing when it senses the appearance of Yin.
Mang seed is a symbol of the maturity of awned crops such as wheat, and it is a solar term reflecting the phenomenon of agricultural phenology. By now, the wheat harvest season in Sichuan Basin has passed, and the transplanting of middle rice and sweet potato is coming to an end. In most areas, medium rice is turning green, and the seedlings are green and full of vitality. " The poem "the east wind has dyed 3000 hectares, and the egrets are flying everywhere" vividly depicts the beautiful scenery of the field at that time.
When it comes to the grain growing season, the medium rice that has not been transplanted in the basin should be planted; If it is further delayed, the vegetative growth period of rice will be shortened due to the increase of temperature, and the growth stage will be vulnerable to drought and diseases and insect pests, so the yield will not be high. Sweet potato should be transplanted before the summer solstice at the latest; If sweet potato is planted too late, not only the effect of drought will be aggravated, but also the temperature will drop when autumn comes, which is not conducive to the expansion of potato block, and the yield will also be significantly reduced. This is the reason why the proverb of farming is busy planting.
Climatic characteristics of mangrove seeds
During the grain growing season, the rainfall was abundant and the temperature increased significantly. The common weather disasters are tornado, hail, gale, rainstorm, drought and so on.
1. Rainfall
It is rainy along the Yangtze River during the grain growing season, and the Huang Huai plain is about to enter the rainy season. In case of continuous rainy weather, wind and hail before and after the grain growing season, the wheat can not be harvested, threshed and stored in time, resulting in lodging, falling grain, sprouting and mildew on the ear, and 'rotten wheat farm' and so on, which will destroy the crops.
After the planting of mangrove, the monsoon rain belt in Southeast China is stable, and it is the season with the most precipitation in a year. The middle and lower reaches of the Yangtze River have successively entered the Meiyu season, with more rainy days, more rainfall, less sunshine and sometimes low temperature.
In grain growing season, rice, cotton and other crops grow vigorously and need more water. Moderate Meiyu is very beneficial to agricultural production; The crops will be threatened by drought in the year of too late or too little plum rain or even 'empty plum'. However, if the Meiyu is too early, too many rainy days and long-term Overcast Rain, it will also have a negative impact on agricultural production, especially if the rainfall is too concentrated or rainstorm will cause floods.
Southwest China has also entered the rainy season of the year since June. At this time, hail weather began to increase in the western southwest plateau.
2. Temperature
During this period, except for some areas in the northernmost part of Qinghai Tibet Plateau and Heilongjiang, people in most areas can experience the heat of summer. Nenjiang, located in the north of Heilongjiang Province, during the 30 years from 1971 to 2000, the hottest day of 37.1 ℃ occurred during the period of mangrove planting.
In June, high temperature weather above 35 ℃ may occur in both the South and the north. High temperature weather above 40 ℃ may occur in the Huanghuai region and the eastern part of the northwest region, but it is generally not persistent. In Taiwan, Hainan, Fujian, Guangdong and other places in South China, the average temperature in June is about 28 ℃. If the air humidity is high before thunderstorm, it is really stuffy and hot. Sometimes it is necessary to issue high temperature forecast to the public to remind people to prevent heatstroke, air conditioning disease and acute gastroenteritis.