Sorghum millet fertilization technology

Gao Yan’s Fertility Regulation

Nitrogen production 3.251.37 kg, phosphorus 1.680.48 kg, and potassium 4.541.14 kg are required for producing 100 kg of seeds. The ratio of the three is 1:0.52:1.37. Among them, from emergence to jointing, the absorbed nitrogen accounted for 12.4% of the total nitrogen requirement, phosphorus accounted for 6.5%, and potassium accounted for 7.5%. From jointing to flowering, the absorbed nitrogen accounted for 62.5% of the total nitrogen requirement for the entire growing season. Accounting for 2.9% and potassium accounted for 65.4%. From flowering to maturity, the absorbed nitrogen accounted for 25.1% of the total nitrogen needed for the entire growth period, with phosphorus accounting for 40.6% and potassium accounting for 27.1%.

Sorghum Fertilization Technology

The application amount of basal fertilizer is generally 30-60 tons of organic fertilizer per hectare, and the phosphorus-deficient land with low fertility should be applied with 300-500 kg of superphosphate.

Fertilizers Ammonium sulphate is safer in commonly used fertilizers. 100-150 kg per hectare is appropriate. If nitrogen and phosphorus compound fertilizer is applied as a seed fertilizer, it is convenient and effective, and it is commonly used as diammonium phosphate. The amount per hectare is 150 kg. The top-dressing period is mainly the jointing period and the flag-raising period, but the fertilizer is usually chased once in production, and the effect of top-dressing at the jointing stage is better. The topdressing amount is generally 300-450 kg urea per hectare. For example, plots with long growing period or late defertilization can be divided into 2 applications. The principle of “light weight before and after weight” should be mastered. That is, jointing fertilizer accounts for 2/3 of the topdressing amount, and the remaining 1/3 is in the flag. Top-dressing.

Millet Fertilizer Requirements

Nitrogen production 2.5-3.0 kg, phosphorus 1.2-1.4 kg, and potassium 2.0-3.8 kg are required for every 100 kg of seeds produced. The ratio of the three is 1:0.5:0.8. Among them, from emergence to jointing, the absorbed nitrogen accounted for 4%-6% of the total amount of nitrogen required for the entire growth period; from jointing to heading, the absorbed nitrogen accounted for 45%-50% of the total amount of nitrogen required for the entire growth period; grain filling, absorption The nitrogen accounts for 30% of the total nitrogen needed for the entire growth period. Potassium uptake during the seedling stage was relatively low. From the jointing stage to the heading stage, the potassium uptake peak occurred. The potassium uptake before heading accounted for 50.7% of the total potassium uptake during the whole growth period, and then gradually decreased after heading.

Millet fertilization technology

Basal fertilizer: The millet is mostly planted on dry land. Organic fertilizer is used as a base fertilizer and it should be applied once in farmland. General organic fertilizer dosage is 15000-300 thousand kg per hectare and 600-750 kg of superphosphate. Fertilizer: When nitrogen fertilizer is used for seed fertilizer application, the amount should not be too much, 37.5 kg ammonium sulfate or 11.3-15.0 kg urea per hectare. Such as farmyard manure and phosphate fertilizer as a seed fertilizer, the effect of increasing yield is also good. Top dressing: The period with the largest increase in top dressing production is the booting period 15-20 days before heading, and it is usually 75 kg per hectare of pure nitrogen. When there are more nitrogen fertilizers, "seated-tire fertilizer" is applied at the jointing stage and "grain-fertilizer" is applied on the booting stage. In the late growth stage of foxtail millet, foliar application of potassium dihydrogen phosphate and trace fertilizer can promote flowering and grain filling.

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