How to apply seed fertilizer in the process of corn planting? What are the precautions?

Seed fertilizer refers to the application of fertilizer near or mixed with seeds to provide nutrients for the initial growth of crops during sowing or transplanting. When planting corn, it is necessary to apply seed fertilizer, which can ensure the fertilizer needed in the initial stage of corn growth and accelerate its growth rate. How to apply seed fertilizer in the process of corn planting? What are the precautions?

First, how to apply seed fertilizer in the process of corn planting?

The main fertilizer is available nitrogen and phosphorus fertilizer. Because of low soil temperature and slow release of available phosphorus in spring, spring maize in alpine areas is more prone to phosphorus deficiency. If the mixture of high-quality mature organic fertilizer and phosphate fertilizer is used as seed fertilizer, the effect is better.

The fields without zinc fertilizer in the base fertilizer can be mixed with zinc fertilizer, 6-8 grams of zinc sulfate per kilogram of seeds. When using chemical fertilizer as seed fertilizer, the amount of chemical fertilizer should not be too large, so as not to affect seed germination. Fertilizer should be applied next to the seed, 4-5 cm from the seed, either by hole or strip.

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.

Second, what are the points for attention in the application of seed fertilizer?

1. Do not select corrosive fertilizers

Ammonium bicarbonate and ammonia are volatile and corrosive and are easy to fumigate seeds and seedlings. Calcium superphosphate contains free sulfuric acid and phosphoric acid, which will cause harm to seed germination and seedling growth, so it is generally not suitable to be used as seed fertilizer. This kind of fertilizer should be applied under the sowing ditch or in a certain soil layer separated from the seeds, or mixed with calcium superphosphate and soil fertilizer.

2. Do not choose fertilizers with toxic ions

Potassium chloride, ammonium chloride and other chemical fertilizers contain chloride ions, which will produce water-soluble chlorides when applied to the soil, which is disadvantageous to seed germination and seedling growth. The nitrate ions contained in fertilizers such as ammonium nitrate and potassium nitrate also have an effect on seed germination.

3. Do not select toxic fertilizers

Urea contains a small amount of biuret, which is toxic to seeds and seedlings.

4. Do not choose strong alkaline chemical fertilizer

Strong alkaline fertilizers such as kiln ash potash fertilizer and steel slag phosphate fertilizer are not suitable to be used as seed fertilizer. Kiln ash potash fertilizer has strong hygroscopicity, gives off a lot of heat after absorbing water, and is easy to burn out seeds and young roots. When it is necessary to make seed fertilizer, it must be mixed with organic fertilizer, applied into the sowing ditch and hole, and then sowed to cover the soil.

5. Do not choose immature farm manure

Barnyard manure and human feces and urine are commonly used as seed fertilizer in rural areas. if they are not mature, it is easy to burn roots and burn seedlings by releasing a large amount of heat in the process of fermentation. Therefore, do not apply unmature organic fertilizer, after composting high-temperature fermentation, fully mature before making a kind of fertilizer. In production, ammonium sulfate, calcium superphosphate, heavy superphosphate and mature organic fertilizer can be used as seed fertilizer.