Spring Fertilizer Management Technology for Pollution-free Wheat

Spring management refers to the management of the returning period--the heading period. It is a period of vigorous growth and reproductive growth of wheat after several stages of growth, such as returning green, getting up, jointing, picking flags, and heading. Therefore, the management of spring fertilizer and water in pollution-free wheat is very important.
(1) It is necessary to use fertilizer water scientifically due to the seedling system. Generally, it should be drawn after greening to protect the roots, increase the temperature, and promote root growth. For late buckwheat, dryland wheat, wheat field in the sandy soil area and wheat field with early sowing and de-fertilization, fertilization should be carried out early in the greening period, and 20-30 kg of ammonium bicarbonate or 5-10 kg of urea should be applied to the mu, which can promote the increase of spring tillering. Increasing the rate of tillering into panicles, but it is easy to make the lower 1-3 internodes elongate; for large and medium-yielding fields with large populations, it is impossible to fertilize and water the soil during the uplifting period. Fertilizer and water management during jointing is very important for high-yield fields and can be reduced. Ineffective tillering, promote the formation of large panicles, reduce the number of infertile spikelets and degraded floret, promote the large number of large ears, while the lower internodes do not grow, there is no risk of lodging. The high-quality and high-yield wheat field will be postponed to the stage of fertilization and watering until the jointing stage to the late stage of the jointing stage. The nitrogen fertilizer is the main one. The proportion of topdressing is 50%-70% of the total nitrogen fertilizer application, that is, the area of ​​400 kg per mu. The block of mu is 20 kg of urea, and the field of 550 kg per mu is about 30 kg of urea. Phosphorus and potassium fertilizer should be supplemented in the appropriate amount of phosphorus and potassium fertilizer. When the group is too large, take timely control or deep roots before the body is lifted, and postpone the first fertilizer to the late stage of the jointing or even when the flag leaves are exposed.
(2) Watering at the right time. Inoculate water in time before the cold current, adjust the near-surface microclimate, and prevent early spring frost damage: If the wheat suffers from freezing damage in early spring, it should be combined with watering to apply quick-acting nitrogen fertilizer.
(3) Foliar fertilization. The surface of the body is sprayed with high-quality potassium dihydrogen phosphate, Tianfengsu, Shuofeng 481 and other foliar fertilizers and plant growth regulators to promote robust growth and improve resilience.
Huaxian Agricultural Technology Promotion Technology Center Li Dongxia

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