Another wave of cold wave and rain and snow hit! Why does cold air appear frequently this winter? How do farmers prevent it?

From 1 65438+1October 29th to 65438+February1,the fourth cold wave broke out in China, which was also the third cold wave in165438+1October. There will be heavy snow and strong cooling weather in the northeast, with a general cooling of around 10℃ and a local cooling of 10℃.

This cold wave has a great impact, and many places in the central and eastern regions will cool down, generally by 6- 10℃ and locally by 10- 14℃. It is estimated that 0℃ will push south to northern Sichuan, northern Hubei, southern Anhui and central Jiangsu, and the lowest temperature in southern Jiangnan will drop to 4℃, and the lowest temperature in Nanjing and Wuhan will drop to 0℃.

The attack of cold air will not only bring about cooling, but also lead to rain or snowfall in Northeast China and North China. Among them, there will be snowfall or heavy snow in Northeast China, snowfall or sleet in North China and light rain or sleet in Shandong.

At the same time of rain and snow, there will be 5-7 northerly winds, and the local gust is as high as 9- 10, which is not good news for facility agriculture.

02. Why does cold air appear frequently?

This year, the cold wave came early and frequently. In June, 5438+065438+ 10 ushered in three cold waves, and the northeast became the center of heavy snowfall. As early as June 5438+065438+1early October, the snowfall has exceeded the historical high.

As for why, there is a cold vortex in the northeast, and the ground cyclone also provides enough water vapor, which makes the snow in the northeast come frequently and affects residents' travel.

Of course, it should also be noted that after the cold wave of 65438+February 1, there will be a cold air on February 2-3 and 65438+February. By then, the northeast and eastern Inner Mongolia will continue to snow, and the temperature will drop by 4-8℃ again.

According to the data of the Meteorological Bureau, the average number of cold waves in June 5438+00-1.8 was1.8, but it appeared four times this year, which shows its frequency. As for why, in the final analysis, it is related to the "Double La Nina" year. Cold air is frequent this winter, and due to global warming, the temperature will rise rapidly after the cold wave, which makes the temperature fluctuate greatly, thus making the cold air evolve into a cold wave.

03, preventive measures of agricultural production

Last week, the Ministry of Agriculture and Rural Affairs made an agricultural analysis of La Nina phenomenon. This winter, the temperature will warm up before it gets cold. Although there are many cold air in11-65438+February, the temperature will rise rapidly after the cold wave, and the cold air will strengthen in1-February next year, and an extreme cold wave will come, which is not conducive to agricultural production.

Temperature fluctuation is unfavorable to agricultural production. After all, fruits and vegetables are prone to chilling injury or freezing injury. If the cold protection is not thorough, it will be bad for crops. Therefore, farmers need to make preparations in advance to ensure better growth of crops.

1, grab crops

In 65438+February, the late rice in the south will be ripe. At this time, it is necessary to prepare for timely demand, speed up the harvest of late rice, and avoid being affected by the cold wave.

For mature vegetables in greenhouses or open air, they should also be harvested in time, which can be placed in the cellar or sold directly to the market. As for aquaculture, the same is true. For fish ponds with high breeding density, the sales part should also be caught in time to avoid the risk of large-scale disease.

2. Facility agriculture should be strengthened.

This cold wave is accompanied by a strong wind, and the author has seen the power of this strong wind. As early as the beginning of 165438+ 10, many greenhouses collapsed due to snowstorm.

Therefore, the strong wind poses a great threat to the shed. Don't think that only blizzard can pose a threat to the shed. Everyone should also pay attention to the maintenance of facility agriculture. In addition to reinforcement, straw can also be placed around to keep warm. At the same time, it is also necessary to check whether the power supply and heating function are normal.

3, antifreeze measures

For fruit trees, although there is no fruit in winter, it is still necessary to cultivate the soil to keep warm, so as to better accumulate nutrients and lay the foundation for high yield in the coming year. The measures are to paint the trunk white, set fire to the orchard to raise the temperature, and cultivate the soil and protect the roots at the base, all of which can ensure the safety of fruit trees in winter.

As for facility vegetables, pay attention to the air leakage in the shed, which can be covered with double-layer shed film, or a shed can be added in the shed to provide warmth for the second floor. After the rain and snow, it is necessary to dig ditches to drain and clear the snow in time, which can provide foliar fertilizer for vegetables and ensure their safe growth.

For open-air vegetables, straw or quilt can be covered to keep warm. Try to harvest and store vegetables that ripen quickly. After the cold wave, timely drainage, spraying foliar fertilizer. , increase its stress resistance, so that it can quickly restore growth.

For the breeding shed, we should also do a comprehensive inspection and close the doors and windows in time to avoid air leakage. At the same time, we should also do a good job of heating to prevent livestock and poultry from getting sick or freezing to death due to low temperature. In terms of rations, we should also provide energy-based feed, such as vitamins and corn, to enhance their cold resistance.

For aquaculture, it is necessary to maintain sufficient water depth in the aquaculture area, such as fish farming in rice fields, and to replenish water in time to prevent fish from being frozen.

After the cold wave, farmers should do a good job in agricultural inspection, clean up and replant frozen vegetables in time. We must also do a good job in livestock and poultry disinfection and disease prevention and control.

I believe that under these agricultural measures, vegetables, livestock and aquatic products can survive the winter safely even if cold waves follow. what do you think?