When to beat the foliar fertilizer of corn?

Corn is one of the crops widely cultivated in the world, and fertilizing it is to ensure its better growth. For example, the purpose of foliar fertilizer is to make up for the lack of nutrients absorbed by the root system. When will the foliar fertilizer of corn be hit? What should I pay attention to?

When will the corn foliar fertilizer be beaten?

Corn foliar fertilizer is generally sprayed during the seedling growth period, 3-5 days before heading, flowering and filling period, and when encountering diseases and insect pests, preferably before 10:00 in the morning and after 5 p.m., and can be sprayed all day on a windless cloudy day. When spraying foliar fertilizer on corn, you should strictly follow the instructions.

What should we pay attention to when beating corn foliar fertilizer?

1. The weather of making leaves and noodles fat

Foliar fertilization should be carried out in relatively humid weather to ensure that the leaves are moist for 30-60 minutes. In case of heavy rain after spraying foliar fertilizer, it should be sprayed again. In addition, the effect period of foliar fertilizer is about 20 days in 3 weeks, and the interval between the first and the second is 10-15 days.

two。 Spraying concentration

The suitable concentration of corn foliar fertilizer is: urea 0.5% Mel 2%, potassium dihydrogen phosphate 0.3% Mel 0.5%, ammonium sulfate 0.2% Mel 9.3%, ammonium molybdate 0.01%, Borax 0.1% Mel 0.2%, Zinc Sulfate 0.1% Mel 0.4%. At the same time, 10% plant ash water, 10% chicken manure, 10% Murray 20% rabbit manure or mature human urine can also be added when spraying fertilizer outside the root, which also has an obvious effect on increasing production.

3. Kinds

Urea, potassium dihydrogen phosphate, calcium superphosphate, potassium sulfate, plant ash leaching solution and some micro-fertilizers are better for foliar fertilizer application of corn, while chloride-containing, volatile and insoluble fertilizers such as ammonium bicarbonate, ammonium chloride, calcium, magnesium and phosphorus are not suitable for foliar fertilization.

4. Spraying quantity

The amount of spraying liquid of corn foliar fertilizer should be sufficient, and the number of times of foliar fertilization should not be too little. It is best when the fertilizer liquid is about to flow from the leaf surface but not. Generally use 45 kilograms of fertilizer liquid per mu. Even if 1% urea is sprayed, the amount of urea used per mu is no more than 2 kg of urea, sprayed 2-3 times continuously, with an interval of 7-10 days.

When mixing, it should be noted that acidic and alkaline fertilizers and pesticides should not be mixed. In addition, do not beat foliar fertilizer after the corn is exposed to high temperature.