One night to winter!Three warnings have been issued for heavy rain, heavy snow and severe convection. This “reverse cold” is too severe
After the Awakening of Insects solar term, the temperature in many parts of the north and south of the country has been warming up, but the cold air is still frequent, the recent temperature fluctuations are very big!With the arrival of a new round of cold air, more rain and snow in the north and south, the temperature is also gradually sliding!In particular, in the next few days, northeast China, North China and Inner Mongolia and other places will usher in a wide range of rain and snow, in Heilongjiang, Jilin, Hebei, Inner Mongolia and other places will have heavy snow weather!Three warnings of blizzard, rainstorm and severe convection will be issued, and the local accumulative temperature drop will exceed 20℃!Let’s take a look at some cool feeling more intense areas: JiJin liao tianjin in Inner Mongolia and other places have snow on the 17th to the 18th, the Midwest of Inner Mongolia, hebei, shanxi, liaoning and other places have a small to moderate snow or sleet, north in central Inner Mongolia, hebei, Beijing north and west, parts of northern shanxi snow, local blizzard.Among them, it is expected that from 8 o ‘clock on March 17 to 8 o ‘clock on March 18, there will be heavy snow in parts of central and southern Inner Mongolia, northern Shanxi, northwestern Hebei and mountainous areas in northwestern Beijing, and local snowfall (10 ~ 15 mm).The depth of new snow in the above areas is 3 to 8 centimeters, and local areas may exceed 12 centimeters.The Central Meteorological Observatory continued to issue a blue alert for snowstorm at 6 o ‘clock on March 17.On March 17, there will still be a large-scale precipitation cooling process in the central and eastern regions, but the range of heavy precipitation decreases and the intensity weakens. It is expected that there will be heavy rain in central and southern Jiangsu, southeast Anhui, Shanghai and other parts of the country on March 17.There was heavy rain in central Jiangsu (50 ~ 60 mm).Under the combined influence of rain, snow and cold air, from 8 o ‘clock on The 17th to 8 o ‘clock on the 18th, most parts of central and eastern China will have a temperature drop of 4 ~ 8℃ accompanied by 4 ~ 5 level northerly winds and gusts of 6 ~ 8 level. The temperature drop in southeastern Henan, central and southern Anhui, southwestern Jiangsu and northeastern Hubei will reach more than 12℃.The Central Meteorological Observatory continued to issue forecasts of wind and temperature drop at 6 o ‘clock on March 17.National Wind and temperature forecast map (8 o ‘clock on March 17-8 o ‘clock on March 18) Guizhou, Yunnan, Guangxi and other places have hail weather is expected from 8 o ‘clock on March 17 to 8 o ‘clock on March 18, parts of southern Sichuan, southwest Guizhou, eastern Yunnan, western Guangxi and other places will have 8 ~ 10 level thunderstorm wind or hail weather;Some areas in southern Anhui, south-central Jiangsu, south-central Hunan, south-eastern Jiangxi, northern and southwestern Zhejiang, northern and western Fujian, southeastern Guizhou, western and northeastern Guangxi, and northwestern Guangdong will have short-term heavy rainfall, with hourly rainfall of 20 to 40 mm and local rainfall of more than 50 mm.It is expected that the main period of influence of strong convection is from daytime to early midnight today.The National Meteorological Center (NMC) continued to issue a blue alert for severe convective weather at 6 o ‘clock on March 17.National Thunderstorm wind or hail warning Map (8 o ‘clock March 17-8 o ‘clock March 18) Extreme cooling, beware of inverted cold in agricultural production, crops in early spring are afraid of “inverted cold” bad weather in the growth process.There is a farming proverb that goes, “an inverted spring cold, ten wheat nine production.”Therefore, the harm of inverted cold to agriculture is great, farmers should be vigilant.1. It has great influence on greenhouse crops.Because of the long rainy and low temperature weather, greenhouse greenhouse in a variety of vegetables, fruits, and other crops, because of the long-term cover in the grass curtain and other coverings under the slow growth, long-term can not see the sun, can not normally photosynthesis, it can not effectively growth and development;And because the greenhouse can not be normal ventilation, resulting in the air in the greenhouse is not effective circulation and become dirty, so easy to cause a variety of diseases.2. Serious damage to flowering and fruiting trees in spring.”Pollen” weather that has been or is about to blossom trees bud, gemma, twigs, or is the ear of apricot blossom, pear, peach, cherry blossoms tree flower, because of rain and cool weather and cold, or chilling freezing, unable to normal flower fruit, caused serious losses to the fruit production, now this kind of situation has appeared.3. It has great influence on spring sowing seedlings.In the cold weather, it is easy to make the seedlings of cotton, fruits, vegetables and other crops that have just been sown in spring suffer from great freezing injury, or make the seedlings of newly unearthed crops freeze to death, or make the seeds of ununearthed crops erode and other phenomena, seriously affecting the normal growth and development of crops.How do growers prevent reverse cold?Common measures to prevent low temperature and freezing injury 1, dig deep, open ditches, cultivate strong seedlings or plants with strong frost resistance.Mixed planting in the middle of crops, cluster planting, group planting, can enhance disaster resistance.2, smoke cold.Severe freezing damage of plants is mainly caused by sudden cold wave.If you can smoke before the arrival of cold, it will also play a certain anti-freezing effect.3, take white tree trunk, root neck soil, cover weeds, film and other cold prevention measures, can prevent the roots and roots of the plant frostbite, but also reduce the evaporation of soil water, conducive to the seedlings anti-freezing.4, the use of straw, straw, grass ash, nylon and other things to cover plants, reduce the loss of heat on the ground, play the role of heat preservation.The above traditional methods and measures can alleviate the loss of crops caused by low temperature when freezing damage comes, but it is difficult to provide a certain guarantee for soil environment and plants themselves.I believe that at this time someone put forward, fertilization can raise the temperature, protect the roots and plants.Traditional chemical fertilizer is used in the winter when the first because of the low Mark Twain, microbial activity is low, even need to keep the soil temperature 25 ℃ and 30 ℃, humidity is 70%, and it will be dissolved in water to absorb, crop absorption environment is poor, and the ingredients of loose soil factor and microbial activity is not substance, water-soluble itself is poorer, the absorption rate is greatly reduced,Crops absorb less nutrients, which is time-consuming for farmers.So in winter fertilization, how to ensure that nutrients are not affected by low temperature, normal supply, and can improve the ability of plants to resist low temperature?The author recommend the use of pollen polysaccharide + have loose soil factors of intelligent fertilizer (e.g., Q5), it can increase crop response to cold and drought stress, minimize loss of output, can also improve the root system of low temperature resistance, increase activity, increase the beneficial microorganisms in the soil, ground temperature, relieve the injury of the low temperature freezing injury, etc.Sf-pollen polysaccharide (SF-pollen polysaccharide) as a plant-derived biological stimulant, sF-pollen polysaccharide has the ability to resist low temperature stress, enhance soil salt resistance, improve root activity, and promote root growth and robust development in low temperature environment.2 loose soil, loose soil factor litres of ground temperature factor using physical technology, has the function of break soil harden, loose soil in pulverizing drop salt effect is remarkable, form good soil aggregate structure, ground temperature for ascension to lay a solid foundation, to provide a good living environment for the root, combining with SF – pollen polysaccharide of NPK nutrients better conversion.Cold areas in winter provide a good living environment for roots to absorb sufficient nutrients.