Irrigation and fertilization to remedy wheat frost damage

The rapid germination of wheat latent buds into ear is the biological basis for the reconstitution of high-yield populations after freezing. The timely irrigation and fertilization of wheat after freezing can still recover considerable losses.

Irrigation after freezing. Watering is a key measure to remedy night frost damage. To remedy the freezing damage to the wheat field, the quality of the irrigation must be paid attention to, and the irrigation should be filled immediately after freezing. Large-area, multi-point surveys have shown that in the case of dry weather (including wheat fields where soil moisture is not too bad), the most effective remedy for night frost damage is watering. The more water is poured, the faster the recovery and the higher the quality of the ear. The quality of watering is very important. Immediately after freezing, it should be filled with water, and it should be fully poured and poured.

Topdressing after freezing. In the case of watering, the application of nitrogen fertilizer can increase the rate of new tillering and increase the number of panicles per acre, but the maturity is delayed and the 1000-grain weight is lower. The survey found that some of the grievances were slightly better. After freezing, there was no watering, and only the plots for topdressing were poor. After freezing, the productivity recovery was poor, far less than the plots that only watered and did not topdress. Practice has shown that the remediation of night frost damage must be based on water, and supplementation can only be used as an auxiliary measure.

(Yang Yushi)