Recently, the phenomenon of low-temperature freezing injury in our city has continuously affected the city's wheat. In order to minimize the damage caused by freezing, the prevention and remedial measures should be taken before and after the occurrence of frost damage.
First, the symptoms and hazards of wheat freeze injury
In the early spring, cold injury (cold spring) refers to the fact that the wheat has entered the period of returning green jointing in the “spring setting†season. Due to the arrival of the cold wave, the temperature of the surface drops below 0°C, and the frost damage occurs. Because at this time the climate has gradually warmed, and suddenly came the cold wave, it is also known as late spring, late frost frost damage. In the wheat fields where frost damage occurs, the leaves are soaked in boiling water, and they dry out after exposure to sunlight. The young spikelets on the top of the stem have their meristematic cells more sensitive to hypothermia than leaf cells. Young panicles after freezing will cause a decrease in the number of panicles and an abnormal spike.
Second, the prevention of freezing injury and remedial measures after freezing
First, the field irrigation, increase the heat capacity; Second, Shunfengtou smoke, increase temperature and prevent frost; Third, strengthen the field management, improve plant resistance to freezing and cold. The remedial measures are: irrigating immediately after freezing, perfusing with adequate irrigation, chasing a small amount of available nitrogen fertilizer, timely cultivating loose soil, and remediating the disease.
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