What fertilizer is best for the latest corn?

Corn is an important food crop and fodder crop, and it is also the crop with the highest total yield in the world, also known as Baogu, Baolu, bract, etc., Gramineae Maize is an annual herb, which is now cultivated all over the world. its planting area and total output are second only to rice and wheat, let's take a look at what kind of fertilizer is best to grow corn!

What is the demand for fertilizer for corn?

Corn plants contain 16 elements, all of which are absorbed from the soil except C, in which nitrogen, phosphorus, potassium, sulfur, calcium and magnesium are needed more, and iron, manganese, zinc, copper and barium are less. From 10 days before heading to 25-30 days after heading, maize accumulated the fastest and absorbed the most fertilizer, which absorbed 70% nitrogen, 60% phosphorus and 65% potassium, accounting for 70% of the total fertilizer absorption. It is estimated that 2.5 kg of nitrogen, 1 kg of phosphorus and 2.1 kg of potassium are needed to produce 100 kg corn seeds, and about 33 kg of urea or 50 kg of ammonium nitrate, 31 kg of superphosphate and 13 kg of potassium sulfate are needed to produce 500 kg corn per mu.

What fertilizer is the best to grow corn?

In the whole growth cycle, maize had the highest nutrient demand for nitrogen, followed by potassium, followed by phosphorus, and an appropriate amount of mineral elements was needed. The growth was better and the yield was higher when the ratio of nitrogen, phosphorus and potassium was about 0.49. 0.9. Base fertilizer generally apply 3000 kg of organic fertilizer, all phosphorus and potassium fertilizer, 1 to 3 nitrogen fertilizer is appropriate. The root system of maize seedlings is underdeveloped and the ability to absorb nutrients is weak. Fertilizer containing available nutrients should be selected as seed fertilizer, and mature farm manure can also be used as seed fertilizer at the same time. Generally, about 6 kg of ammonium sulfate per mu or 500 kg of mature farm fertilizer can be applied. Appropriate amount of phosphorus and potassium fertilizer can be added. Corn needs the most fertilizer in the big trumpet stage, and the absorption rate is faster, so the fertilizer with quick effect and high nitrogen content can be selected and applied.

How to use corn fertilizer?

1. Seed dressing: humic acid, biological fertilizer and micro-fertilizer can be selected to dissolve the fertilizer, spray it on the corn seed and mix it while spraying, so that the fertilizer solution is uniformly stained on the seed surface and sowed after drying.

2. Soak the seeds: dissolve the fertilizer into a certain concentration, soak the seeds in the solution for 12 hours, and sow the seeds immediately after drying.

3. Strip application or hole application: chemical fertilizer is suitable for strip application or hole application, with a dosage of 2 to 5 kg, but fertilizer must be separated from seeds, and deep fertilization is better, with a depth of 10 to 15 cm. Urea, ammonium bicarbonate, ammonium chloride and potassium chloride are not suitable to be seed fertilizers.

How to fertilize corn in different periods?

1. Base fertilizer: base fertilizer is mainly applied in combination with slow-acting fertilizer and quick-acting fertilizer, and slow-acting fertilizer refers to farm manure. Available fertilizer refers to common calcium, urea, potash and zinc fertilizer. 1000-1500 kg of organic fertilizer, 30 kg of common calcium, 6 kg of urea and 2 kg of zinc fertilizer are applied as base fertilizer at one time.

2. Seedling fertilizer: when the leaves are 6-7 leaves, 10 kg urea is applied to the maize plant. The urea should be 3-4 cm away from the plant and cannot be properly applied to the plant. The fertilization time should be chosen after the rainy day. If the weather is too dry, it is best to water after topdressing.

3. Jointing fertilizer: jointing fertilizer is usually fertilized two months after sowing, when the number of leaves of maize is 11-12, 24 kg urea and 10 kg potash fertilizer are applied at one time. The method of fertilization is the same as that of seedling fertilizer, and some fertilizer and water should be added if necessary.