Application Technology of Base Fertilizer in Wheat

It's another wheat sowing season. How to apply wheat base fertilizer has become a major concern of farmers.

For every 500 kg of dry matter, wheat needs to absorb 10.5 grams of pure zinc, 9 grams of pure boron, 13 grams of pure manganese, 0.44 grams of pure molybdenum and 4 grams of pure copper. Although the amount of trace elements is small, but without a certain kind, the yield will be greatly reduced. For every 500 kg grain, wheat needs 13-15 kg of pure nitrogen, 5-8 kg of pure phosphorus and 7.5-11.5 kg of pure potassium. Considering the factors such as straw returning to the field, fertilizer utilization efficiency and the difference of fertility in different plots, it is suggested that 7.5-11.5 kg of pure nitrogen, 6.5-10.5 kg of pure phosphorus and 7.5-10 kg of pure potassium should be applied to wheat before sowing.

? The law of nutrition absorption of wheat:

Before returning to green stage, it is necessary to absorb nutrient content in the total fertilizer application, about 1 to 6 nitrogen, 1 to 8 phosphorus and 1 to 10 potassium. About 65% nitrogen, 45% phosphorus and 85% potassium are needed before heading (25% from initiation to jointing stage and 60% from jointing to heading stage), and about 20% nitrogen and 40% phosphorus are needed after heading. The mobility of phosphorus element is small and the aftereffect is large. The utilization rate of phosphate fertilizer applied to the whole layer of tillage layer is 340% higher than that of centralized application, and it is better to apply phosphate fertilizer as base fertilizer at one time. Potassium needs about 85% before getting up to heading, and potash fertilizer can be applied completely at one time or 1 to 3 bottom, or 2 to 3 in combination with topdressing nitrogen fertilizer at jointing stage. As the mobility of potassium in the soil is also small, and topdressing increases labor costs, it is suggested that one-time bottom application should be applied before wheat sowing. The best basal application of nitrogen fertilizer is about 1 beat 3, and it is suitable to top apply 2 beat 3 at jointing stage. Corn straw returned to the field also needs to add 4-8 kg of pure nitrogen to decompose the straw.

? Application ratio of wheat base fertilizer:

Urea 15 kg per mu (can also be replaced by ammonium bicarbonate containing 17% nitrogen 50 kg), diammonium phosphate 15 kg, potassium chloride 15 kg. It is recommended to apply regular brand compound fertilizer such as: (the ratio of N, P2O5 and K2O: 15-15-15 50kg or 18-18-18 40kg or wheat special formula fertilizer 50KG), the ratio is scientific, labor-saving and time-saving, and the absorption and utilization rate is high. On this basis, attention should be paid to the timely topdressing of urea and foliar fertilizer during the growing period. If growers have micro-irrigation equipment, they can also reduce the use of potash fertilizer in the base fertilizer by 1 hand, 2-2 and 3, and apply it in combination with topdressing nitrogen fertilizer in spring. Huang Wenxia