Timing of foliar fertilizer spraying on corn: is it related to the amount of water?

AbstractWhen corn suffers from pests and diseases, or when the soil is too acidic, too alkaline, or too high in salinity, and during the full fruit stage, after plants suffer from gas damage, heat damage, and freeze damage, foliar fertilizer can be sprayed. Whether corn foliar fertilizer spraying is related to the amount of water: generally, for root-outer spraying, it is necessary to add 10% wood ash water, 10% chicken manure liquid, 10%-20% rabbit manure liquid, or decomposed human urine, etc.

I. Timing of foliar fertilizer spraying on corn

1. Foliar fertilizer can be sprayed when corn suffers from pests and diseases, which helps improve the plant's disease resistance; or spray foliar fertilizer when the soil is too acidic, too alkaline, or too high in salinity, affecting the plant's nutrient uptake.

2. During the full fruit stage, after plants suffer from gas damage, heat damage, or freeze damage, an appropriate time can also be chosen to spray foliar fertilizer, which helps relieve the symptoms.

II. Is corn foliar fertilizer spraying related to the amount of water?

1. Whether corn foliar fertilizer spraying is related to the amount of water: generally, the suitable spraying concentrations are urea 0.5%-2%, ammonium sulfate 0.2%-9.3%, monopotassium phosphate 0.3%-0.5%, ammonium molybdate 0.01%, borax 0.1%-0.2%, zinc sulfate 0.1%-0.4%.

2. Generally, when spraying fertilizer outside the roots, it is necessary to add 10% wood ash water, 10% chicken manure liquid, 10%-20% rabbit manure liquid, or decomposed human urine, etc., which will have a relatively obvious yield-increasing effect.

III. Effects of foliar fertilizer spraying on corn

1. Promote growth

Since foliar fertilizer contains trace element components, spraying it can comprehensively supplement nutrients, which helps increase crop growth speed.

2. Control vigorous growth

During the stem growth stage, corn is prone to excessive growth and rampant growth, so it needs to absorb a large amount of nutrients from the soil, making it impossible for corn to obtain sufficient nutrition during the ear-setting stage.

3. Increase yield per plant

Spraying foliar fertilizer helps promote the healthy growth of corn ears, significantly improves corn ear fullness, and avoids the occurrence of empty ears.

4. Improve disease resistance

One of the reasons corn develops diseases is insufficient nutrients, which easily leads to reduced corn resistance, etc. Therefore, timely application of foliar fertilizer can enhance corn's stress resistance and promote healthy and robust growth of corn.

IV. Spraying techniques and precautions

1. When spraying on the leaves, generally focus on the underside of the leaves, because the underside has more stomata than the upper side, which helps improve the nutrient absorption rate.

2. Foliar fertilizer cannot be sprayed during the flowering stage or seedling stage of corn, because the flowering stage is fragile, and improper fertilization can easily cause fertilizer damage and reduce corn yield; the seedling stage is also not suitable for spraying, because the base fertilizer can already fully supply the nutrition needed by corn seedlings.

3. When spraying foliar fertilizer, avoid high-temperature weather. To reduce leaf evaporation and improve the absorption rate, it is necessary to avoid high-temperature and rainy weather.