After freezing injury occurs in wheat fields, do not easily destroy the seedlings. Care should be taken to observe the frozen wheat seedlings. If a single wheat stem is frozen, the single stem that stems from death is the main stem and the big shoots, and the small tiller is still green, and it is at the base of the big shoots. There are also sprouting buds of small tillers that have just emerged. Such wheat seedlings are promoted by fertilizers, and small tillers and axillary buds can grow into effective tillers, and remedial measures can be used to obtain better yields.
Timely topdressing nitrogen fertilizers to promote the growth of small tillers to find the main stem and the wheat field where the Oita is frozen have to be top-dressed twice. After the first thawing in the field, the topdressing nitrogen fertilizer is applied, and 10 mu of urea is applied in the mu. The application of the ditch is required to increase the fertilizer efficiency. In the absence of barley and wheat, the daily average temperature is above 0 DEG C., and the quick-effect fertilizer can be applied. 20 mu of water is planted in the rear mu to promote fertilizer dissolution and plant absorption. The amount of water to be soaked into the ground is appropriate on the day. Phosphorus can promote the growth of tillers and roots. The phosphorus-deficient land can be mixed with urea and diammonium phosphate. The second time in the jointing stage of wheat, combined with watering and fertilizing, 10 kg of urea was used for mu. Generally affected by freezing injury in wheat fields, only the leaves freeze, there is no death phenomenon, early in the spring early scratching, increase the temperature, promote wheat seedlings turn green, get up during the top dressing watering, improve the rate of tillers into the ear.
Strengthen the management of fertilizers and water in the middle and later stages to prevent premature aging and freezing wheat fields due to plant nutrient consumption more, and prone to premature failure in the later period. On the basis of the first topdressing in the spring, we should look at the growth and development status of wheat seedlings, according to their needs, at the jointing stage or pick During the period of the flag, top-dressing is appropriate to promote large-grained spikes and increase grain weight.
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