Fertilization principle The number of nutrients is appropriate and the ratio is appropriate, which balances supply and demand. With the popularization of chemical fertilizers, many farmers have neglected the use of organic fertilizers, leading to soil degradation. Organic fertilizer can not only improve the fertility, but also help to improve soil material structure and increase soil permeability and water retention. Therefore, it is recommended to use organic fertilizer as the mainstay and fertilization strategy supplemented by chemical fertilizer. The application of phosphate fertilizer is also very common. It should be noted that phosphate fertilizer is a long-acting fertilizer, and fertilizer efficiency can be accumulated in the soil, which can be applied every other year or appropriately reduced.
Fertilization technology Phosphorus and potassium fertilizers are generally used as base fertilizers. Nitrogen fertilizer should determine the ratio of base fertilizer to top dressing according to soil characteristics. The ratio of base fertilizer and topdressing in loam soil is 6:4, sandy soil is 4:6, soil viscosity or irrigation condition is poor, and bottom fertilizer should account for 80%. The fertilization method is preferably layered, that is, 20% to 30% of the base fertilizer is used to sprinkle the head before the plow.
The utilization rate of several fertilizers in the current season is 20% to 30% for crude fertilizer, 55% for urea, 40% for ammonium bicarbonate, 60% for ammonium sulfate and ammonium nitrate, and 50% for ammonium chloride, potassium chloride and potassium sulfate.
Requirements for soil fertility The level of nutrients in the soil directly affects wheat yield. For high-yield fields with a yield of more than 400 kg, the soil organic matter is required to be 1% to 2%, the total nitrogen content is 0.08% to 1.012%, the available nitrogen is 60 to 80 ppm, the available phosphorus is 20 to 30 ppm, and the available potassium is 100 ppm or more.
Huaxian Agricultural University Liu Huimin
Fertilization technology Phosphorus and potassium fertilizers are generally used as base fertilizers. Nitrogen fertilizer should determine the ratio of base fertilizer to top dressing according to soil characteristics. The ratio of base fertilizer and topdressing in loam soil is 6:4, sandy soil is 4:6, soil viscosity or irrigation condition is poor, and bottom fertilizer should account for 80%. The fertilization method is preferably layered, that is, 20% to 30% of the base fertilizer is used to sprinkle the head before the plow.
The utilization rate of several fertilizers in the current season is 20% to 30% for crude fertilizer, 55% for urea, 40% for ammonium bicarbonate, 60% for ammonium sulfate and ammonium nitrate, and 50% for ammonium chloride, potassium chloride and potassium sulfate.
Requirements for soil fertility The level of nutrients in the soil directly affects wheat yield. For high-yield fields with a yield of more than 400 kg, the soil organic matter is required to be 1% to 2%, the total nitrogen content is 0.08% to 1.012%, the available nitrogen is 60 to 80 ppm, the available phosphorus is 20 to 30 ppm, and the available potassium is 100 ppm or more.
Huaxian Agricultural University Liu Huimin
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