Effect of Freezing Injury on Wheat in Early Spring

In the early spring, frost damage refers to the time when wheat enters the returning green jointing period. Since it begins to grow, the cold resistance gradually decreases. When the cold wave arrives and the surface temperature drops below 0°C, it causes different degrees of frost damage to wheat.

In wheat fields that have suffered freezing damage in early spring, the leaves of wheat seem to burn like hot water, and they dry up after being exposed to sunlight. In the early jointing stage of wheat, the panicle differentiates into the primordium differentiation stage of the stamen and stamens. It is very susceptible to freezing, and the panicles are atrophied and finally dry. If the young panicles are in the oleidal stage, that is, before and after the production period, it is said that the young panicles are frozen. Still crystal clear, not frozen. Generally, the main stem and the big tiller are faster than the small tillers, and the freezing process is faster. The cold injury of the watering on the day of the late spring cold is heavier, and the freezing damage before watering is not obvious; the early sowing of wheat is better than the late sowing of wheat. Severe frost damage; shallow sowing is heavier than sowing.

It is recommended that farmers should pay attention to the situation of freezing, pay close attention to fertilization and watering. Wheat is a crop with tillering properties. Wheat fields that suffer from frost damage in early spring do not freeze all of them, and wheat axillary buds can grow into grains with long components. As long as the field management is strengthened, a better harvest can be obtained as well. The wheat that suffered from frost damage in early spring must immediately apply the available nitrogen fertilizer and watering. The combined effects of nitrogen fertilizer and water will promote the early tillering of wheat and small borers, increase the tillage percentage, and reduce the loss of freezing damage.

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