Is corn top dressing better long acting fertilizer or urea? What is the reason?

Top dressing corn is made of urea or compound fertilizer, and the dosage varies depending on the variety and top dressing method. The amount of top dressing for maize is about one-third of the total amount of nitrogen fertilizer, and the amount of top dressing can be increased to half of the total amount of nitrogen fertilizer in land with poor soil fertility and weak water retention. Nitrogen, phosphorus and potassium are used for corn fertilization, and farmhouse fertilizer is the best.

Corn topdressing is mainly nitrogen fertilizer, and urea or compound fertilizer is selected. Corn seedlings cannot be topdressed for the first time with chemical fertilizer, but can only be topdressed with farmhouse fertilizer. Because corn seedlings have just grown, their roots are fragile and cannot tolerate the addition of fast fertilizer, so they can only be topdressed with mild farm fertilizer.

Corn topdressing is very important, to apply more urea, compound fertilizer, must use chemical fertilizer. The trumpet stage before maize tasseling is the critical period for nitrogen fertilizer and the period for top dressing maize. Corn is a high-nitrogen fertilizer crop, and urea nitrogen fertilizer needs to be added about three times in general production to meet the growth and increase the yield.

However, labor is also becoming more and more valuable now. The corn planting area is large, and it is tiring to add fertilizer, not to mention other management. The scientific and rational use of long-term slow-release fertilizer can effectively improve fertilizer utilization, reduce labor costs, and improve efficiency, rather than frequent supplementation of urea.

Top dressing corn is made of urea or compound fertilizer, and the dosage varies depending on the variety and top dressing method. The amount of top dressing for maize is about one-third of the total amount of nitrogen fertilizer, and the amount of top dressing can be increased to half of the total amount of nitrogen fertilizer in land with poor soil fertility and weak water retention. Nitrogen, phosphorus and potassium are used for corn fertilization, and farmhouse fertilizer is the best.

Corn topdressing is mainly nitrogen fertilizer, and urea or compound fertilizer is selected. Corn seedlings cannot be topdressed for the first time with chemical fertilizer, but can only be topdressed with farmhouse fertilizer. Because corn seedlings have just grown, their roots are fragile and cannot tolerate the addition of fast fertilizer, so they can only be topdressed with mild farm fertilizer.

Corn topdressing is very important, to apply more urea, compound fertilizer, must use chemical fertilizer. The trumpet stage before maize tasseling is the critical period for nitrogen fertilizer and the period for top dressing maize. Corn is a high-nitrogen fertilizer crop, and urea nitrogen fertilizer needs to be added about three times in general production to meet the growth and increase the yield.

However, labor is also becoming more and more valuable now. The corn planting area is large, and it is tiring to add fertilizer, not to mention other management. The scientific and rational use of long-term slow-release fertilizer can effectively improve fertilizer utilization, reduce labor costs, and improve efficiency, rather than frequent supplementation of urea.

Urea is good. The top dressing of corn is generally in the corn pollination and earing stage, and the top dressing is mostly urea. Some farmers order fertilization, which involves grabbing a handful of urea from the corn and throwing it near the corn roots.

There are also people who want to cut two holes in the urea bag for convenience, and run along the corn ridge with the urea bag on their backs. During this time, the temperature is high, and farmers need to apply fertilizer when it rains. During this period, the effect of corn topdressing is good, but the labor intensity is high.

Uremia is used for top dressing of corn, mainly to the roots of corn, so that the roots absorb nutrients, and then rely on the roots to absorb nutrients, transported to all parts of the corn, branches, ears, and fruits can absorb nutrients in order to grow and develop, so the urea and the like mainly act on the roots first.

When the corn grows to 6-7 leaves, it is necessary to fertilize, and organic fertilizer can be applied per mu or strip with imported high-nitrogen water-soluble fertilizer. It should be noted that the amount of fertilizer can not be increased at will, which is easy to cause excessive vegetative growth, thereby affecting the reproductive growth of corn.

In the booting stage of corn, that is, after the corn appears "big flare", the female spikelets and florets of corn begin to differentiate, and timely re-application of bract fertilizer can promote the normal development of ears and increase grains, generally 14 days before heading. If the base fertilizer is insufficient and the growth of corn is weak, it is necessary to increase the amount of fertilizer, and the rotting farmhouse fertilizer and Yanwo microbial agent can be applied per mu, and at the same time, according to the soil moisture, appropriate watering to replenish the water.

Corn top dressing can consider compound fertilizer, how to say, compound fertilizer nutritional structure ratio is more balanced, and many compound fertilizers have a longer fertilizer effect than urea, which is very helpful for corn. At the same time, for the crops that grow more vigorously, top dressing can now urea, here it is not that the application of compound fertilizer is ineffective, but that there is no urea effect in comparison.

When corn topdressing, urea and compound fertilizer are mixed, and at the same time, the growth of corn can be guaranteed, and the fruit is full and large. At the seedling stage, sprinkle a handful of fertilizer next to the seedlings and bury them with soil.

It is better to use urea, because urea can make corn grow faster after being added.

Corn does not use much foliar surface, as long as the fertilizer is enough, it is very good, and potassium dihydrogen phosphate is used if you want to use it.

It is better to use long-acting urea for corn topdressing in Northeast ChinaLong-term slow-release and slow-control fertilizer can replace frequent topdressing of urea, and can effectively improve fertilizer utilization, reduce labor costs and increase benefits.

1. Why do you choose long-acting fertilizer for corn?

Corn topdressing is very critical, use urea or compound fertilizer, and use the right fertilizer. The large flare stage before maize tasseling is the critical period for nitrogen fertilizer and the period for maize topdressing. Corn is a high-nitrogen fertilizer crop, and urea nitrogen fertilizer needs to be applied about 3 times in general production to help meet the growth and increase yield.

However, at present, labor is becoming more and more valuable, and if the corn area is planted in a large area, it will be tiring to apply fertilizer, not to mention other management.

As long as the scientific and rational use of long-term slow-release slow-control fertilizer can replace frequent topdressing urea, and can effectively improve fertilizer utilization, reduce labor costs and increase benefits. At present, slow-release fertilizers include not only nitrogen fertilizers, but also phosphorus and potassium fertilizers. In order to improve the nutrient release effect of slow-release fertilizer for corn, attention should be paid to the selection of fields with deep soil layer, fertile and loose drainage and good drainage to plant corn, and the soil should be deeply turned and harrowed.

Generally, it is not a sandy land with serious fertilizer leakage, as long as the application of the above two slow-release and slow-control fertilizers, coupled with scientific field management, timely prevention and control of pests and diseases, and avoid soil drought or water accumulation in the field affecting the release of nutrients, it is completely possible to achieve high yield.

2. What kind of fertilizer is good for corn?

Urea or compound fertilizer is mostly used for top dressing, and its dosage varies depending on spring and summer corn. Corn topdressing must be guaranteed twice, you can choose to use Haihewei balanced water-soluble fertilizer, after the seedling, pay close attention to the seedling fertilizer, this topdressing should be based on nitrogen and phosphorus fertilizer, which can achieve the purpose of both seedling and steady growth.

The second topdressing should be carried out at the large bell stage after jointing, and the amount of nitrogen fertilizer should be twice that of secondary nitrogen fertilizer, so as to ensure the large demand for nitrogen at the panicle differentiation stage. Top dressing should take the method of hole covering the soil, and eliminate sprinkling and surface application to prevent waste caused by volatilization.

Whether to use urea or foliar fertilizer for corn topdressing needs to be selected according to the specific situation.

Under normal circumstances, urea can be used for corn topdressing, which is also the fertilizer used by most farmers. Corn is a nitrogen-loving crop, so during the whole growth period, the nitrogen fertilizer can not be broken. Under normal circumstances, the bottom fertilizer is normal, and when it reaches the big bell stage, 20-25 kg of urine laughing hormone can be applied to one acre of land.

However, the corn in different plots has different growth, and there are also cases of choosing compound fertilizer, such as the plots that have not applied base fertilizer, a single topdressing urea will not work, phosphate fertilizer and potassium fertilizer should also be supplemented, so it is necessary to topcoat compound fertilizer, and the amount of compound fertilizer can not be too little, about 30-40 kg, according to the growth of corn, the state imitation of 50 kg per mu is also available.

In addition to corn fields without base fertilizer, plots with relatively poor soil, or low-lying plots, it is also recommended to choose compound fertilizer when topdressing corn. For the phenomenon that corn has turned purple and red, it is also necessary to apply compound fertilizer in time and supplement phosphate fertilizer and potassium fertilizer.

Therefore, corn topdressing is urea or foliar fertilizer, need to be selected according to the specific situation, urea can be used to save some costs, foliar fertilizer can be used to save some costs, foliar fertilizer can be used, and the yield can not be reduced in order to save costs.

Of course it's good. <>

Corn special fertilizer is a fertilizer that is prepared according to the needs of corn growth, which is better.

Technical points of corn skillful top dressing:

1. The time for corn topdressing.

The trumpet stage (about 10-12 leaves) is the best period for top dressing of corn, because the reproductive growth and vegetative growth of corn at this time are relatively vigorous, and the amount of fertilizer required is larger than that of Liang. At this time, top dressing can effectively promote ear differentiation, make corn ears large and more grains, and the yield increase effect is very obvious.

Generally speaking, corn topdressing has the best effect of topdressing twice, the first time in the jointing and booting stage (accounting for two-thirds of the total topdressing), the second topdressing of panicle fertilizer (accounting for one-third of the total topdressing), and the first topdressing can be started 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. Rent slag.

2. Fertilizer selection for corn top dressing.

If the corn leaves have signs of zinc deficiency, potassium deficiency and other deficiencies, you can choose to apply the soil chef polymerized potassium dihydrogen phosphate to supplement phosphorus and potassium elements, and the soil chef contains trace elements of water-soluble fertilizer.

If the corn is not deficient, urea can be applied, and the amount of topdressing can be determined according to the soil fertility, generally 30 40 kg of urea per mu, which can meet the needs of corn growth in the later stage.

3. The method of topdressing jade code rice.

In order to save trouble, many growers directly sprinkle fertilizer with top dressing, but usually the top dressing effect is not ideal. It is recommended that you take artificial pit covering soil topdressing, and the fertilization distance is generally 10 cm away from the root of the plant, and the depth of the pit is 10 cm.

4. Precautions for corn topdressing.

When topdressing, the planting density is more than that, and the density is smaller. In addition, sandy soil has poor water and fertilizer retention, so it should be applied in small amounts and in large quantities to prevent fertilizer loss.

When topdressing, it is necessary to look at the ground, see the seedlings and top dressing, low-lying land and alkaline land, to choose ammonium nitrate, ammonium sulfate, superphosphate and other acidic or physiological acidic fertilizers for top dressing. For sandy loam soil with poor water and fertilizer retention capacity, ammonium nitrate or urea that is not easy to volatilize should be used as top dressing.

Top dressing at the seedling stage can not be too early, and top dressing before jointing often leads to corn growth and weak roots. In addition, excessive topdressing during the grain filling period will lead to late maturation.

It is best to look at the weather forecast before topdressing, it is best to topdress before rain in the case of soil dryness, and after corn topdressing, you should also flexibly grasp whether you need to water according to the dry and wet conditions of the soil.

Soil testing is carried out to determine the soil fertility grade, and then the number of top dressing and the amount of fertilizer used. Observe the growth of corn before topdressing, and if there are signs of defertilization, the number and amount of topdressing can be appropriately increased.

The special fertilizer is matched according to the needs of corn, so it is better to chase corn special fertilizer in the later stage of corn.