How to top dressing corn and what fertilizer is mainly chased in the later stage of corn topdressing

Corn has a long growing season and a high demand for fertilizer. Therefore, basal fertilizers must be adequately applied. The fertilization method is mainly decomposed organic fertilizer on the farm, top dressing and reapplying phosphorus and phosphorus fertilizer, and topdressing and nitrogen fertilizer, which can not only prevent corn seedlings from growing, but also prevent corn plants from not defertilizing in the later stage, and ensure the normal growth and development of corn.

At the same time, corn is sensitive to zinc and needs a lot of potassium, and insufficient zinc-potassium absorption will affect corn yield. It can be implemented according to their chemical characteristics and the needs of different growing periods of corn. Then, according to the growth and fertilizer demand of corn in each growth period, the type and amount of fertilizer were determined to prevent premature plant senescence, promote the normal growth and development of corn, increase grain weight and improve yield.

The period of high fertilizer demand of corn is mainly from seedling stage to small bell stage, and the amount of fertilizer required in this period is small, and the base fertilizer is sufficient to guarantee. From the large flare to the tasseling stage, the fertilizer demand is the largest, and from the tasseling stage to the maturity stage, it is also smaller.

Of the three main elements, nitrogen and potassium are the highest, and phosphorus is the least. According to these three critical periods and fertilizer needs, the following should be done in fertilization:

First, apply plantar fertilizer:

Applying sufficient basal fertilizer, improving soil fertility and increasing comprehensive nutrition is the basic guarantee for cultivating strong seedlings. Insufficient base fertilizer will weaken the growth of seedlings and affect normal growth. Generally, 4000-5000 kg of farm fertilizer, 15 kg of urea, 50 kg of superphosphate, 15-20 kg of potassium sulfate, and 2-3 kg of zinc sulfate are applied at one time in combination with land preparation.

Second, the spike attack period to apply strong straw fertilizer (large eight mouth stage to the tasseling stage):

This kind of fertilization is also called strong stalk tapping fertilizer, which is mainly to increase the leaf area of corn plants, promote the thickness of corn stalks, and then make the boot fruit. If there is a lack of nutrients, the plant growth is weak, and the female and male flowers are not perfectly developed, which will cause poor fertilization, such as fewer grains, baldness, etc., which will affect the yield. Top dressing is mainly nitrogen fertilizer, supplemented by potassium fertilizer.

The amount of top dressing is 15-20 kg of urea per mu and potassium sulfate 5.

Third, top application of grain fertilizer (from the male stage to the mature stage).

After tasseling, the corn cob begins to gradually enrich and the grains become larger. In order to prevent premature aging, enhance the light energy conversion of leaves, and increase the weight of corn grains, 5 kg of urea and 2 3 kg of potassium sulfate can be applied per mu. Excess urea will delay maturation, and potassium can promote the transformation and accumulation of corn starch, increase yield, and promote quality.

Corn fertilization:

The method of combining base fertilizer, seed fertilizer and top dressing is used to achieve subsoiling fertilization, seed fertilizer isolation and fractional fertilization. Fertilization techniques should be combined with drought measures. In order to reduce the amount of fertilizer, a new high fertilizer film solution can be sprayed to improve the absorption and utilization rate of fertilizer by corn.

1. Bottom fertilizer: Bottom fertilizer should be applied when preparing the land and making ridges, and the fertilization depth should be more than 8-10 cm below the seeds. 20% of nitrogen fertilizer, 80% of phosphorus fertilizer and potassium fertilizer and other fertilizers such as organic fertilizer and long-lasting ammonium carbonate can all be used as basal fertilizer for deep application.

Increase the application of organic fertilizer or farmhouse fertilizer to make up for the lack of phosphorus and potassium fertilizer application.

2. Seed fertilizer: seed fertilizer should be applied at the time of sowing, the fertilization depth should be 3-5 cm below the seed, 5% of nitrogen fertilizer, 20% of phosphorus fertilizer and potassium fertilizer are applied as seed fertilizer, and at the same time, after sowing, spray the new high fat film 800 times liquid moisture retention and waterproof evaporation, sun protection and drought resistance, heat preservation and antifreeze, soil layer compaction, suffocation and isolation of pests and diseases, and improve the seedling emergence rate.

3. Top dressing: The fast-acting nitrogen fertilizer should be applied at the large bell mouth stage, the fertilization depth should reach 8-10 cm, and the soil should be covered, and the fertilizer amount should be about 75% of the total amount of fast-acting nitrogen fertilizer. At the same time, spraying Zhuangpingling solution at the booting stage of corn can strengthen the physiological function of corn, improve the quality of pollination, fertilization and grain filling, and increase the 1000-grain weight.

4. Foliar fertilizer: According to the growth and development of the plant, foliar fertilizer spraying should be carried out in a timely manner. If the amount of phosphate fertilizer in the seed fertilizer is small, potassium dihydrogen phosphate can be sprayed later, fully dissolved with 300 grams of potassium dihydrogen phosphate and 100 kg of water, and sprayed together with 800 times of new high-fat film, zinc-deficient plots can be sprayed with zinc sulfate and a small amount of lime solution.

Nitrogen fertilizer was the main topdressing of maize. Secondly, if the base fertilizer is less phosphorus and potassium, it is recommended that you apply additional compound fertilizer with higher phosphorus and potassium content; The most important thing is to attack the bud fertilizer, which should be mainly nitrogen fertilizer at the beginning of the big flare, with less phosphorus and potassium fertilizer.

According to the law of fertilizer demand for corn growth, corn top dressing is mainly nitrogen fertilizer, with some potassium fertilizer and phosphate fertilizer, generally speaking, high nitrogen, low phosphorus and medium potassium or high nitrogen, low phosphorus and low potassium fertilizer can be. High harvest in all aspects of the comprehensive supply of nutrients needed during the growth of crops, nutrition, regulation, control, sterilization, corn can increase the yield of more than 300 catties when used twice.

Corn topdressing has a good effect of topdressing twice, once in the jointing and booting stage (accounting for two-thirds of the total topdressing), and the second topdressing of ear grain fertilizer (accounting for one-third of the total topdressing), and topdressing can be started once when about 10 leaves. If time does not allow, a one-time topdressing can also be carried out in early July, but it is not necessary to do so.

Top dressing is good is to manually plane the pit and ditch to cover the soil, which will achieve a good application effect because of deep fertilization, strict coverage, high fertilizer utilization rate, but time-consuming and labor-intensive, and labor intensity.

Hello, dear is happy to answer for you. The top dressing of corn in the later stage is mainly the compound fertilizer of high nitrogen, low phosphorus and medium potassium, and the big flare stage of corn is the key period for top dressing. Corn has very strict requirements for water and fertilizer, so when choosing a planting environment, you must choose a place where the soil is fertile and can be irrigated and drained.

If you want to increase the yield of corn, you must apply more fertilizer to it, and it must be fertilized reasonably, so as to meet the nutrient needs of corn throughout the growing season. 1. The top dressing of corn in the later stage mainly chases the compound fertilizer with high nitrogen, low phosphorus and medium potassium. The big flare stage of corn is an important period for top dressing, which can be combined with drip water each time the fertilizer is applied.

The amount of fertilizer must be strictly controlled to avoid fertilizer damage, and it will also be detrimental to the growth of corn. 2. Corn has strict requirements for water and fertilizer, so when choosing a planting environment, the soil must be fertile, and it can be irrigated and drained. When preparing the land, it is necessary to open three ditches, namely the main ditch, the surrounding ditch and the compartment ditch, so that the ditch and the ditch are connected, the ditch does not accumulate water, and the irrigation can be drained.

When preparing the corn land, it is necessary to plough the frozen billet or plant a season of winter vegetables every other year, so that when the corn is sown in the second year, the soil will be very loose and dry, and the aggregate structure is good, which is beneficial to the growth of corn. 3. If you want a high yield of corn, you must apply more fertilizer to it, and reasonable fertilization can meet the nutrient demand of corn throughout the growing period. The three stages of corn require different proportions of fertilizer, accounting for 2 total fertilizer needs at the seedling stage, 85 at the ear stage, and 13 at the grain stage.

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1.Top dressing nitrogen fertilizer: After corn earing, the basal fertilizer effect applied in most plots has been basically exhausted. In order to ensure the filling and fullness of the grains, it is necessary to provide the best available nitrogen fertilizer to prevent premature aging of corn and increase the 1000-grain weight.

2.Appropriate application of medium and trace element fertilizer: In the growth and development of corn, not only nitrogen, phosphorus and potassium fertilizers are needed, but also medium and trace element fertilizers are also needed to increase efficiency.

For example, spraying cadmium foliar silicon fertilizer from the jointing stage to the grain filling stage can promote the growth of maize, increase the yield of maize, and provide a guarantee for high yield of maize.

3.Taboo large water and fertilizer: watering and topdressing during the corn filling period to increase the yield, is the key to ensure a high yield and harvest, but must not put too much nitrogen fertilizer, otherwise Rong Fanchen is easy to cause corn to be greedy for green and late maturity, affecting the yield.

The foliar silicon fertilizer technology adopts a creative way of thinking, and is developed by using the silicon elements necessary for the cell wall of plant roots, which is a pollution control technology that is convenient and available, controllable and applied, and can be applied on a large scale, which has the effect of reducing heavy metal content, increasing yield and quality, and improving stress resistance of crops.

First, the law of corn fertilizer needs.

Nitrogen fertilizer and phosphorus fertilizer were absorbed by maize throughout the growth period, among which the demand for nitrogen and phosphorus was the largest, and the absorption of phosphorus fertilizer in the later stage of grain filling and maturity was reduced, and the proportion of phosphate fertilizer absorbed in the later stage was still about one-third of the whole growth period. The demand for potassium fertilizer for maize is mainly concentrated in the jointing stage to the heading stage, among which the most potassium is required at the flowering stage, and there is basically no need for potassium fertilizer after the flowering stage.

Second, corn topdressing time.

Corn big flare stage (about 10-12 leaves of corn), is the most vigorous stage of physiological growth and vegetative growth, at this time the rhizome and leaves of the plant grow and develop together, the amount of fertilizer required is the whole growth period of the most demand, the largest period, this time for top dressing, on the one hand, can provide sufficient nutrients for the growth and development of corn is not urgent, on the other hand, it can promote spikelet differentiation, increase the size of the ear, improve the saturation of grains and single grain weight, and the effect of increasing yield in the later stage is very obvious.

The first time in the jointing and booting stage (accounting for two-thirds of the total topdressing), the second topdressing (accounting for one-third of the total topdressing), the first topdressing can be started when 10 leaves are left and right. If time does not allow, Huaiming can also carry out a one-time topdressing in early July, but it is not necessary to do so.

Ways of top dressing for corn:

1. Sprinkle directly on the ground.

2. Top dressing in the ditch and covering the soil.

3. Artificial pit deep application and soil covering. For summer maize, interplanting corn and winter-sown maize with poor soil nutrient content, little or no basal fertilizer, seed fertilizer application is more needed.

Seed fertilizer should be available nitrogen, phosphorus, potassium fertilizer and high-quality rotted human manure and livestock, poultry manure, but the amount of application should not be too much, generally ammonium sulfate, ammonium nitrate or ammonium chloride can be applied per mu 5 kg; The biuret in urea is easy to burn the seeds, and the dosage should be smaller, not more than 4 kg per mu. Potassium chloride is used as seed fertilizer, and the maximum amount per mu is not more than kilograms.

Nitrogen, phosphorus, potassium compound fertilizer or diammonium phosphate is the best seed fertilizer, 10-15 kg per mu can be used. The application of seed fertilizer can be ditched or holed, and stirred with the soil before sowing, to achieve seed and fertilizer isolation, to avoid burning the seeds.

Top dressing should be mainly nitrogen, and should be carried out at the seedling, panicle or flowering stage. Pursue the straw fertilizer at the jointing stage, chase the panicle fertilizer at the big bell stage, and apply granular fertilizer as appropriate at the flowering stage. Each of the three topdressing accounts for 20% of the total topdressing.

Corn fertilization method: apply sufficient base fertilizer, supplement seedling fertilizer, apply seedling fertilizer and so on. Bisun

1. Apply sufficient base fertilizer.

Corn is suitable for growing in a nutrient-rich environment, in the process of breeding, you can apply to the field when planting to the rotten farmhouse fertilizer-based, compound fertilizer as a supplement, the amount of fertilizer of farmhouse fertilizer is 3,000 catties per mu, and the amount of compound fertilizer is 50 kilograms per mu.

2. Supplement seedling fertilizer.

Corn sowing 10 days after the shed germination, in order to make the seedlings grow more evenly, can be sprinkled with 100 catties of urea per mu to promote the growth of plants, and for the growth of thin seedlings, to fertilize more, and the growth of robust seedlings, should be less fertilization, to avoid excessive growth, resulting in growth.

3. Apply seedling fertilizer.

The stalk of corn grows too slender, after encountering heavy storms and rainy weather, it is easy to break and lodging, which affects the yield, so after the corn grows to a height of 40 cm, it is necessary to apply a seedling fertilizer for it, mainly with urea, supplemented by compound fertilizer, to promote the plant to grow and mature as soon as possible, and grow flower spikes.

Corn seedlings are small, slow to grow, and require less fertilizer, but after jointing to heading, nutrition and reproduction grow at the same time, and a large amount of fertilizer is needed. Top dressing is generally carried out at the big flare stage, that is, after 10 leaves have grown, to meet the needs of corn growth in the later stage. The amount of top dressing should not be too much, but the nutrition should be comprehensive.

In addition to nitrogen, phosphorus and potassium, corn also needs trace elements such as zinc and boron to reduce the situation of grain shortage and baldness in the later stage and improve corn yield.

When topdressing, you can add 2 3 kg of zinc sulfate, or spray zinc sulfate solution and borax solution on the foliar surface. Corn growth control and top dressing are both ways to increase yields. Controlling the growth can reduce the internode height, promote stem thickness, prevent lodging in the later stage, reduce the heading height, reduce the influence of high temperature on grain growth, and improve the yield of maize.

Nowadays, corn topdressing is basically sown, and it is carried out when the rain is coming or after the rain. The safest and most effective way is to burrow, dig a hole between the corn plants, fill it with fertilizer, and cover it with soil, but pay attention not too close to the root system to avoid burning the roots. This method requires time and labor, and small areas can be cultivated.

Crops and flowers depend on fertilizer", it can be seen that the role of fertilizer in the growth process of crops is very large. And corn, as a crop that likes big fertilizer, top dressing is one of its important links!

In the growth process of corn, there are generally three periods, and the macro type is the time when the nutrients are most imitated: jointing stage, large flare stage and male spinning stage.

Because of the rapid growth during this period, the panicle differentiation is carried out, and the consumption of nutrients is the most, we must top fertilize in time to supply the nutrients needed for the growth of corn.

The best time for top dressing is the big bell period of corn, and our local area is generally a "bombardment" type top dressing, that is, top dressing is carried out in the big bell period of corn, and only this time is topdressing, and the follow-up will not be top dressing.

Corn top dressing, generally based on nitrogen fertilizer, our most commonly used is urea, supplemented by phosphate fertilizer, potassium fertilizer or farm fertilizer, to supplement the nutrients needed for the rapid growth of corn, promote corn growth full grains, high yield and stable yield!

usGenerally, about 20 kg of urea is topdressed per muIf the soil is not fertile and the seedlings are weak, you can apply more fertilizer as appropriate to ensure the nutrients required for the development of corn!

Corn topdressing, which is now basically spreading, is carried out when the rain is about to come or after the rain

Although this saves labor time and labor, there is also a drawback, sometimes the fertilizer is sprinkled, but the rain does not necessarily fall, and the fertilizer effect is easy to volatilize, affecting the effect of top dressing.

Sometimes the rain is too heavy, and the fertilizer will be washed out of the field with the rainwater, and the effect of top dressing cannot be achieved.

The safest and most effective method is to burrow, dig a pit between the corn plants, fill it with fertilizer, and cover it with soil, but pay attention not too close to the root system to avoid burning the roots.

This method requires time and labor, and it is okay to plant a small area, but mechanization should be considered if there is a lot of land.

After top dressing, the effect will be better if it rains. If the fields are dry and there is no rain in recent days, it is necessary to carry out manual watering. The moist surface is conducive to the absorption of fertilizer, which can promote the development of corn, and the ears are large and full, laying a good foundation for a bumper harvest!

In short, corn topdressing is an important part of the corn production process, and we have done a good job in several aspects that need to be paid attention to in order to promote the growth and development of corn, make the grain full, increase the grain weight, and achieve the purpose of high quality and high yield.