Fertilization is very important for many crops. Let's learn the key points of corn fertilization today. Take a look at the places where fertilization has not been noticed during the corn planting process on weekdays.
First, use a reasonable fertilization method
Effectively avoid fertilizer damage and exert fertilizer efficiency. The application of the base fertilizer should be combined with the organic fertilizer and the chemical fertilizer. The fertilization method can be applied before the arable land, or it can be combined with the machine.
Second, determine a reasonable amount of fertilizer
Generally, it is necessary to produce fertilizer and fertilize soil fertility. 1 kg of nitrogen, phosphorus and potassium can increase the yield of 8-10 kg of grain. Generally, for every 100 kg of grain, the production capacity of soil is calculated as 60%. 3.43 kg (converted to 46% urea 7.5 kg), phosphorus 1.23 kg (converted to 16% superphosphate 7.7 kg), potassium 2.36 kg (60% potassium chloride 3.9 kg).
Third, scientifically formulate the number of fertilization
Strive to make each fertilizer supply effective and reasonable, to do the end fertilizer, seed fertilizer, top dressing and application. According to the actual situation, the general base fertilizer can be fertilized on the basis of 1000-1500 kg of organic fertilizer, 15 nitrogen-15 phosphorus-15 potassium (universal type), 20 nitrogen-15 phosphorus-5 potassium (middle or more fertile) or 16 nitrogen-12 phosphorus-12 potassium (low-yield or infertile) 20-25 kg, 20-25 kg of urea in the big flare period, 10-15 kg of urea in the ear stage. To meet the demand for nutrients in different growth periods, to prevent de-fertilization and reduce waste, so that fertilizers can play a greater benefit.
4. Determine a reasonable proportion of nitrogen, phosphorus and potassium fertilizer application
This is mainly for the pursuit of balanced fertilization. During the growth of corn, nitrogen and potassium are generally absorbed and phosphorus is less. The ratio of nitrogen, phosphorus and potassium absorption is roughly 100: 37: 84. Combined with the high utilization rate of nitrogen and potassium and low utilization rate of phosphorus, it is important to supplement nitrogen, appropriate amount of phosphorus and potassium in fertilization. The application ratio of nitrogen, phosphorus and potassium is roughly 100:60:40, and it is recommended to implement formula fertilization. Firstly, according to the fertilizer requirement of corn, soil fertility and fertilizer effect, the corn fertilization index system under different fertility levels was established according to the field test and soil test results. Based on this, a formula fertilization zone map and a formula fertilization scheme are formulated.
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