For no-overflow of winter water, severe drought, the tillering festival is in the dry soil layer, the secondary root length is not long or very short, and the wheat field with yellow seedlings or dead seedlings appears. It is necessary to pour the “seedling preservation water†as a spring field management. The first measure is to do a good job.
The first is to start hands early and pour a good "seedling maintenance water." For plots that seriously affect the normal growth of wheat due to drought, when the average temperature on the day is stable at 3°C, and water can be infiltrated quickly after the watering during the day, we must pay close attention to watering and keeping seedlings as early as possible. When watering, care should be taken to irrigate small water, avoid flooding, flood water, and nighttime ground ice formation. According to the conditions of drought, first light and heavy, first sand land after the clay land, the principle of weak seedlings after the weak seedlings, according to local conditions poured a good "seedling maintenance water."
The second is the application of appropriate amount of nitrogen fertilizer.
For drought-frozen yellow seedlings, dead seedlings or defertilized wheat fields, about 10 kg of urea should be applied per acre in combination with watering. Appropriate application of diammonium phosphate to promote secondary root spouts, increase spring tiller hyperplasia and increase tiller percentage.
The third is reasonable irrigation, pouring water to ensure soil moisture, improve water use efficiency. Due to the large area of ​​drought in the province and the relatively scarce water resources, all places must pay attention to the wheat fields seriously affected by freezing and drought, and promote water-saving irrigation techniques, with irrigation of 40 cubic meters per mu. After watering, it is necessary to timely scratch the ground when the moisture content is suitable, remove the compaction, loosen the soil, maintain the temperature, and promote the growth of roots and tillers.
For non-irrigated dryland wheat fields, the spring management should focus on repression and lifting of earthworms, and after returning the soil to the early spring or following a light rain, apply N fertilizer with chemical fertilizer or digging to increase the number of ears and grain per ear. Increased grain weight and increased yield have outstanding results. General acres of topdressing urea about 12 kg. The application of phosphate fertilizer to the base fertilizer must be supplemented with diammonium phosphate.
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