How many chemical fertilizers are used in one mu of corn? what's the best fertilizer for corn?

Corn is one of the famous grains in our country, which is planted in the north and south of our country at present. More and more people choose to plant corn in recent years, but when planting corn, fertilization is very important. There are some skills to be mastered in the amount of fertilization and the choice of fertilizer. Next, let's learn about it together.

How much fertilizer is used in one mu of corn?

1. For fields with a yield of more than 800 kg / mu, it is recommended that nitrogen fertilizer 16-18 kg / mu, phosphate fertilizer 6-8 kg / mu, potash fertilizer 5-8 kg / mu, zinc sulfate 1-2 kg / mu, borax 0.5 kg / mu.

2. For fields with a yield level of 600-800 kg / mu, 14-16 kg / mu of nitrogen fertilizer, 4-6 kg of phosphate fertilizer, 4-7 kg / mu of potassium fertilizer, 1-2 kg / mu of zinc sulfate and 0.5 kg / mu of borax are recommended.

3. For fields with a yield level of 400-600 kg / mu, 12-14 kg / mu of nitrogen fertilizer, 3-5 kg of phosphate fertilizer, 1-5 kg / mu of potash fertilizer, 1 kg / mu of zinc sulfate and 0.5 kg / mu of borax are recommended.

4. For fields with a yield level of less than 400 kg / mu, it is recommended that nitrogen fertilizer 10-12 kg / mu, phosphate fertilizer 2-3 kg / mu, potash fertilizer 1-3 kg / mu, borax 0.5 kg / mu.

What is the best fertilizer for corn?

The main results are as follows: 1. In the whole growth cycle, the demand for nutrients of maize is the most, followed by potassium, followed by phosphorus, and an appropriate amount of mineral elements is needed. The growth is better and the yield is higher when the ratio of nitrogen, phosphorus and potassium is about 1: 0.49. Base fertilizer generally apply 3000 kg of organic fertilizer, all phosphorus and potassium fertilizer, 1 to 3 nitrogen fertilizer is appropriate.

2. 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 or 500 kg of mature farm fertilizer should be applied per mu. 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 apply Fertilizer to Maize 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.

Matters needing attention in topdressing of Corn

1. Look at the soil and manure. Topdressing depends on the nature of the soil. Acidic or physiologically acidic fertilizers such as ammonium nitrate, ammonium sulfate and calcium superphosphate should be selected as topdressing in low-lying land and alkaline land. Alkaline fertilizers such as urea and ammonium bicarbonate should be used as topdressing in acidic soil, and non-volatile ammonium nitrate or urea should be selected as topdressing for sandy loam with poor ability of water and fertilizer conservation.

2. Looking forward to topdressing. The seedling stage should not be fertilized too early, which is convenient for the maize seedlings to grow thick and strong. In the period of female and male panicle formation, topdressing should not be too late to prevent premature senility. In the later stage, topdressing should be timely and appropriate to prevent greedy green late ripening.

3. Look at the trend to get fat. Due to the different conditions of soil quality, fertilizer and water conservancy, although the same variety is sown at the same time, the growth is different, there are strong seedling plots and weak seedling plots, and the growth of corn in the same plot is also different. Therefore, there should be some differences in topdressing. The specific methods are as follows: chemical fertilizer is applied in strong seedling plots, and rotten human manure and cake fertilizer are also applied in weak seedling plots; for weak seedlings in strong seedling plots, partial food should be given and more topdressing should be applied to rejuvenate weak seedlings quickly. Ploughing should be done in time after topdressing.

After reading the introduction of corn fertilization above, we must have a deeper understanding of corn fertilization. There are many fertilizers available for corn, and the amount of fertilizer applied in different periods is also different. If corn needs topdressing, it can be judged from its soil and other aspects.