Practical experience tells us that in order to make up for the mistakes in the wheat season, in addition to replacing early-maturing varieties and improving the quality of farming, there is still great potential in implementing strain-funging technology.
According to research, the production of 100 kg of wheat requires the absorption of nitrogen 3.0-4.0 kg from the soil, 1.0-1.5 kg of phosphorus pentoxide, and 3.0-4.0 kg of potassium oxide. The ratio of nitrogen, phosphorus and potassium is 1.0:0.3:1.0. Within a certain range of production, the more fertilization, the higher the yield.
According to conventional fertilization, the fertilization law of wheat that is planted in a timely manner is: heavy application of base fertilizer, application of seedling fertilizer, re-application of early application of fertilizer, and application of Spring fertilizer. The principle of fertilization of late-sown wheat is: heavy application of base fertilizer, dressing and fertilizing, quick application of seedling fertilizer, application of wax fertilizer, early application of green fertilizer. Make it "to make up for the fat, to promote the early fight."
Re-application of base fertilizer, seed dressing and fertilization, quick application of seedling fertilizer, can ensure the needs of nutrients in wheat growth and development in time, can promote the early growth of strong seedlings, early hair before winter, bring stalks into winter; ç‹ apply fertilizer, early return to green fertilizer It can supply nutrients in time, consolidate and strengthen tillers, and increase the rate of adulteration.
The base fertilizer generally accounts for 60%-70% of the total fertilization of wheat. It is necessary to use organic fertilizer as much as possible, and apply a certain amount of chemical fertilizer. 1000-1500 kg of fermented farmyard manure per mu, plus 25 kg of ammonium bicarbonate, 25 kg of superphosphate, 5.0-5.5 kg of potassium oxide, or 50-75 kg of ash.
The seed dressing fertilizer has a significant yield-increasing effect on late-sown wheat. Generally 2.5 kg of urea per acre, or 7.5 - 10.0 kg of superphosphate. Urea can be mixed with wheat seeds. Phosphate fertilizer should be mixed with the fermented and sieved farmyard manure and then mixed with the wheat seeds. It should be mixed evenly, and then buried in the soil after sowing.
After the emergence of late wheat, due to the drop in temperature, the decomposition of organic fertilizer is slow, and it is necessary to rush to apply quick-acting fertilizer to raise seedlings. The release of ammonium bicarbonate is faster, and the fertilizer is applied quickly. The seedlings per acre are 5-8 kg. The seedlings are weaker, and 8 to 10 kilograms of wax fertilizer is applied per mu. In the winter, the wheat seedlings with insufficient tillering should be applied to the green fertilizer at the end of February and early March, applying 15 kg of ammonium bicarbonate per mu, or using 100-150 ml of Huimanfeng active liquid fertilizer, and spraying 40-50 kg of water. For the wheat field lacking phosphorus, 10-15 kg of superphosphate should be applied per acre. For late-cast wheat with sufficient base fertilizer or fertile soil, there is a phenomenon of late-wheat early in the case of high temperature and sensation. After the spring, you should control the topdressing to prevent lodging.
In the period from heading to milking, wheat should also be sprayed with potassium dihydrogen phosphate or chemical fertilizer, 100 grams per acre, sprayed 50 kg of water, which has obvious accelerated growth, increased grain number and promotes early maturity. .
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