Wheat fertilization "four see four set"

The pursuit of jointing and booting fertilizer in spring is the key to promoting the transformation of wheat seedlings and robust growth, and is also an important measure to ensure high yield and stable yield.

Look at the fertility foundation of the wheat field and set the fertilization variety. Where the soil fertility level is high in the wheat field, a sufficient amount of organic fertilizer is applied before planting, or the soil testing formula is applied and the fertilizer is applied. In the spring, less or no nitrogen fertilizer is applied, and only phosphorus and potassium fertilizers are applied. Where the soil fertility is poor, fertilization is affected by the rainy rain before sowing, so that the wheat field with insufficient application should be applied with some nitrogen fertilizer, and combined with phosphorus and potassium fertilizer.

Second, look at the development stage of wheat seedlings, and set the fertilization time. According to the growth and development stage of wheat in the Yellow River Basin, it is generally the best time to apply joint fertilizer in late February to early March. At this time, fertilization can promote the formation of panicles and increase the rate of ear formation. Promote the differentiation of spikelets and florets, and strive for more large spikes. At the same time promote the growth of the top three leaves. Therefore, fertilization at this stage is the maximum effect period of winter wheat fertilization. At this stage, the length of the first internode of the main stem of the wheat plant has been stabilized, and the second section is elongating. After fertilization, it will not cause the base internode to stretch too long and weaken the lodging resistance of the wheat, which can only promote the robust growth of the wheat. Conducive to jointing and heading, increase the number of acres of ear.

Third, look at the appearance of Mai Miao, and apply fertilizer. According to the spring wheat seedling growth, determine the reasonable amount of fertilizer. Where wheat leaves are green, leaves are drooping, no de-fertilization, large population of wheat fields, generally do not apply nitrogen fertilizer or less nitrogen fertilizer, can apply 10-12 kg of phosphorus and potassium fertilizer; where soil fertility is poor, affected by overcast rain Seeding is late, the seedlings are poor, the number of tillers per plant is small, and the number of small wheat fields should be 6-8 kg per mu, or 15-18 kg of ammonium bicarbonate, and with the application of superphosphate and chlorination. Potassium is 5-6 kg each, or 1000-2000 kg of biogas slurry is applied per mu. Promote the rapid growth of wheat seedlings and increase the rate of tillering into ears.

Fourth, look at the climate and soil moisture, and apply fertilization methods. First, when the topdressing is selected, the weather is fine at noon. Second, the wheat fields with irrigation conditions can be filled with water immediately after application, or they can be applied with water. Third, the fields without irrigation conditions must be used for deep application. The depth of fertilization should reach 5-8 cm or more, and the buckwheat should be immediately after application to prevent the fertilizer from volatilizing and improve the fertilizer utilization rate. Fourth, when the rain is heavy, the fertilizer can be directly sprinkled into the wheat field before the rain; the fifth is to apply the biogas slurry fertilizer and have irrigation. It can be applied with water, the dry land can be directly poured into the wheat pocket, and then the soil is covered slightly; the sixth is the external fertilizer, spraying 0.2%-0.3% potassium dihydrogen phosphate solution at the jointing stage, spraying per acre The amount of liquid is 40-50 kg.

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