As soon as this remark came out, netizens complained about it, and many netizens thought that this expert was "guiding randomly".
This can not be blamed on netizens questioning and complaining, whether the overwintering wheat should be covered with thermal insulation film, it is indeed impossible to generalize.
Wheat varieties
As we all know: wheat is divided according to the sowing season, which is generally divided into spring wheat and winter wheat.
Spring wheat is generally sown in March and April, and the sowing time will be about a month different depending on the temperature, humidity and land conditions in the north and south.
Winter wheat is generally sown around November, in the north it is generally sown from the end of October to the beginning of November, and in the south it will be about half a month late.
The sowing time of spring wheat is less affected by the weather, and there is no overwintering problem. What expert Li Baoming said is that winter wheat should be covered with thermal insulation film when overwintering.
So does winter wheat need to be covered with insulation film for overwintering?
There is a lot of snow in the north, a few more heavy snowfalls, cover the wheat with a quilt, the wheat can not only absorb water well to develop and grow, but also will not be spoiled, and the yield will be better in the coming year. This is also what the proverb says: "In winter, the wheat covers the three-layer quilt, and the next year sleeps with a pillow of steamed buns".
If the weather is dry and cold and there is little snowfall, it can indeed freeze to death. But in the north, such extreme weather is very rare. In such extreme weather, covering the cold-proof film can play a role in cold protection and reduce the evaporation of water, and can play a good role in arid, cold and snow-less areas.
Therefore, what expert Li Baoming said is not completely unreasonable, but it is necessary to adapt measures to local conditions.
If all winter wheat is covered with insulation film as soon as it is overwintered, it is actually a bit "redundant".
Wheat sown in normal seasons and covered with insulation film in normal climates is likely to be "thankless".
Farmers have worked hard to buy insulation film, and if they spend their efforts to cover the insulation film, the yield of wheat may also be affected.
Although the wheat will not be frozen after being covered with thermal insulation film, it is difficult for wheat that has not undergone low-temperature vernalization and has not been covered with snow to flower and bear fruit.
In addition, as an overwintering crop, the growth characteristics of winter wheat determine that winter wheat can only grow normally after overwintering.
Winter wheat was introduced to the mainland from the Shangzhou period more than 4,000 years ago, and has the characteristics of "not afraid of severe winter cold, but afraid of spring warm and cold", and generally wheat can tolerate low temperatures of -20 °C and survive, so it will not be frozen to death.
Netizens are hotly discussed
After expert Li Baoming proposed that "wintering wheat should be covered with thermal insulation film in time", it aroused heated discussions among netizens. Some netizens questioned, will he be able to farm?
Some netizens believe that Expert Li is not selling thermal insulation thin, or is it related to selling thermal insulation film?
Seeing some comments from netizens, I really couldn't laugh or cry. Even words like "Fei Huang" came out.
This can't be blamed on netizens, winter wheat has been introduced to the mainland for a long time, and covering thermal insulation film is indeed rare. As an overwintering plant, winter wheat generally has to go through three layers of heavy snow.
Objectively speaking, what Expert Li said is not completely unreasonable, but it is only in that extreme weather that it needs to be covered with thermal insulation film. It is hoped that when experts speak, they can give guidance to the masses in a more realistic way and in accordance with local conditions.
Write at the end
Orange is orange born in Huainan, and orange is born in Huaibei, and the leaves are similar, but the taste is different. So what's the difference?
Each crop has its own biological characteristics, and at the same time is affected by objective conditions such as climate and temperature, so it is necessary to adapt measures to local conditions when sowing seeds, and cannot be generalized.
What do you think about this? Welcome to leave a message in the comment area.
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