Is it the best way to deal with the cold in late spring to irrigate and improve the soil in time before the strong cooling?

In agricultural production, wheat is afraid of cold in late spring. Some farmers say that a cold spring will reduce the production of ten wheat and nine crops! It can be seen that the influence of late spring cold on wheat yield is great. So, how can wheat safely cross the hurdle of late spring cold? Today, Bian Xiao will tell you more.

What is a cold spring? Since the cold spring is so severe, what is it? It is necessary for us to understand this concept first. Late spring cold usually refers to the weather phenomenon that the temperature rises rapidly in early spring (generally refers to March) and the temperature in late spring cold (generally refers to April or May) is lower than normal. Meteorology, after being frequently attacked by strong cold air, the temperature drops rapidly and lasts for more than 1-2 weeks, which is called late spring cold.

In fact, to put it bluntly, the cold spring is a short-term sudden drop in temperature when the temperature rises to a higher level in spring and suddenly encounters strong cold air.

The cold in late spring is very harmful to agricultural production. In recent years, the central and western regions and southern regions have frequently suffered from cold weather in late spring, resulting in frozen production reduction of wheat, fruit trees, rape and vegetables.

Studies show that the later the late spring cold occurs, the greater the damage to crops. Take wheat as an example. In late spring, wheat suffered from late spring cold, and its influence was far greater than that in early spring. Because at the end of spring, the wheat in the Central Plains is in the jointing or booting stage, at this time, the ability of wheat plants to resist low temperature is weak and they are sensitive to temperature changes. Extreme low temperature is easy to cause the young ears of wheat to freeze to death, resulting in reduced production and no harvest.

Some people say that wheat can't freeze under heavy snow in winter. Why does cold air hurt wheat in spring? In fact, the frost resistance of wheat in different periods is different. Just like people, young people are more resistant to freezing, but old people are not. Crops, like people, have different resistance to cold in different periods.

What will happen to wheat in late spring? It depends on the time when the late spring chill occurs. Wheat meets the cold current in late spring in early spring, some wheat leaves are scalded by boiling water, and the sun will slowly die. If it is cold in late spring, the stems and leaves of wheat look normal, but the wheat will head late or even not, and in severe cases, there will be dumb ears, white ears and dead ears. Experienced farmers are familiar with this, because this phenomenon is not uncommon and farmers can judge it.

How to prevent the cold resistance of late spring wheat varieties is different, which requires us to have an understanding of the comprehensive resistance of wheat varieties before planting wheat, and try to choose wheat varieties with strong cold resistance.

In management, it is also an important link. Generally speaking, vigorous wheat seedlings are obviously more resistant to freezing than weak wheat, which is the same reason that fat people are more resistant to freezing than thin people. Wheat planted too thick is easy to freeze, and wheat fields with pests and diseases are also afraid of freezing. Understand these, we must work hard on management, strike while the iron is hot, and wheat Miao Zhuang is not afraid of freezing.

In addition, pay close attention to the weather forecast. Judging whether it will affect wheat growth according to the cooling range and cold air intensity is an important barrier to prevent late spring cold.

Next, this measure is crucial. That is, if the weather forecast says there will be a strong cooling, then irrigation should be done in advance at this time. Practice shows that watering wheat before strong cooling is the most effective way to prevent late spring cold.

Why irrigation can prevent colds in late spring? This is related to physics, so we don't need to know much about it. Knowing how to use this trick is enough. This has the same effect as pouring antifreeze on wheat before winter.

What should I do if the wheat meets the cold in late spring? Sometimes the weather forecast is easily overlooked by everyone, and sometimes the forecast is not accurate. After the occurrence of late spring cold, wheat suffered from freezing injury. What should I do? Is there any remedy?

Prevention in advance is active, and post-disaster measures are passive. Nothing can say that the effect of active prevention is better than that of post-disaster remedy. However, post-disaster remedy is better than no rescue. Next, let's talk about how to remedy the cold of wheat in late spring.

After the cold winter of wheat, if it happens in early spring and the tillering node of wheat is not frozen to death, it can be compensated by adjusting taxes and fees. As long as watering and topdressing in time and strengthening management can increase the effective tillering of wheat. In addition, foliar fertilizer such as potassium dihydrogen phosphate solution should be sprayed at the grain filling stage in the late growth stage to effectively control the occurrence of wheat diseases and insect pests, with little effect on yield.

If the late spring cold occurs in late spring or even early summer, the freezing damage is serious, which leads to abnormal wheat heading, or a large number of "white ears" and "dumb ears", which is of little significance to remedy, and the wheat yield is definitely unpredictable, so cut the wheat and feed it to cattle, and switch to other crops as soon as possible.