The weather is cold, how to avoid wheat freezing injury?

If the temperature drops earlier this year, it should be decided according to the growth of soil and seedlings, so as to avoid watering too late, and the water will freeze and not melt, causing damage to the roots. If you water it too early, the seedlings will grow more vigorously. It is best to pay attention to the weather in advance, and the average temperature of water is 3-5℃ to avoid the influence of extreme weather.

If the winter is cold and accompanied by rain, and part of it is postponed to mid-June 165438+ 10, this kind of land with good soil moisture and water conservation can also be left without watering. The late spring cold of wheat refers to the cold wave that makes the surface temperature drop below 0℃ with the gradual increase of temperature after "beginning of spring". After the jointing stage of wheat, there will be low temperature, spring cold, freezing injury or chilling injury. Before jointing stage, lodging chilling injury and freezing injury of wheat often cause stem death, which leads to the decrease of jointing stage rate of wheat. During the period from scion to emergence, freezing injury often causes a large number of young panicles to be "short of grain", "bald tip" and "empty shell", and even fail to emerge. Due to the decrease of heading rate and grain number per ear, the yield decreased.

After jointing stage, the cold resistance decreased: the young spike of wheat is the most sensitive period to low temperature from pistil formation to medicinal development. As long as it is lower than the specified minimum temperature for a long time, even if the young panicle has a low temperature above 0℃, it may have different degrees of low temperature freezing damage, below 0℃. Generally speaking, the later the occurrence of late spring cold in wheat, the greater the impact and damage to the development of young spike in wheat.

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