What are the effects of spraying foliar fertilizer on corn?

The application of foliar fertilizer to corn can increase yield, improve disease resistance, promote growth, reduce soil pollution, and quickly supplement nutrients, and it is a common practice in the process of topdressing corn. Besides foliar fertilizer, the following topdressing timings and points should also be known.

Topdressing timing for corn

1. Stalk fertilizer

Apply within 10 days after jointing; it promotes stem growth and young ear differentiation. Use 1/3 of the nitrogen fertilizer in the topdressing as jointing fertilizer, and in combination with hoeing and ridging, keep a distance of 5 cm—7 cm between the fertilizer and the seedlings.

2. Ear fertilizer

Apply the remaining nitrogen fertilizer during the large trumpet stage, 10 days-15 days before corn tasseling. It can promote larger ears and more kernels, and has a good effect on later grain filling.

Precautions for topdressing corn

1. Amount

Corn topdressing should be applied in an appropriate amount according to soil fertility, the fertilizer requirements of the variety, and the growth period of the variety, so as to meet the needs of corn growth and development. Plots with lower soil fertility should increase the topdressing amount; otherwise, the amount can be appropriately reduced.

2. Frequency

Most corn is topdressed once at the 9-11 leaf stage, around June 25. If the amount used for topdressing is relatively large, apply twice (jointing-booting fertilizer and ear-kernel fertilizer). The distribution principle for two topdressings is that the first should account for 2/3 of the total topdressing amount, and the second for 1/3. For light soils such as sandy soil, which have poor fertilizer and water retention, apply small amounts multiple times to prevent nitrogen leaching.

3. Method

There are 3 commonly used topdressing methods in corn production, namely broadcasting on the ridge platform, topdressing in the furrow, and digging holes between plants on the ridge platform by hand. Everyone should choose according to local production conditions.

Because the corn varieties planted, soil conditions, and climatic conditions in each region are all different, the fertilizers used are also different. Growers should pay attention to adapting measures to local conditions and not blindly apply the methods of other regions.