After urea top dressing, is it better to water it immediately, or after a few days?

Whether or not you need to water immediately after urea topdressing depends on the condition of the soil. If the soil is dry, you need to water it in time, and if it is wet, you need to wait a few days before watering. It is important to know that urea is a fertilizer containing a variety of substances, which needs to be hydrolyzed and converted in the soil in order to make crops absorb better.

If the water content is very low during the fertilization process, and there is no water after the urea has been sprinkled, the crops may die due to lack of water. Don't assume that because you have soil to cover your plants, you can retain nutrients and that you are likely to die in the process. <>

If the soil is not dry, there is no need to water it immediately because it takes 7 days to complete the planting process. Urea does not adsorb to the soil when it is converted into other substances, so it may blend into the water if it is irrigated with large amounts of water. When it rains, it washes away with the water and does not protect the plants.

There is water in the soil itself, and it is a good paving when it is fused with urea. You can cover urea under the soil, and the sun can't dry the urea. <>

If urea is to be used in a timely and appropriate amount, it can be used as a foliar fertilizer. When planting crops, you can choose to spray urea because the amount of protein in it is very high. The concentration in the process of spraying should not be too large, otherwise it is easy to burn leaves.

If you are sprinkling corn, wheat, etc., you can't exceed 2%, and vegetables can't exceed 1%. Each crop has its own required proportions, so be sure to know it before sowing it. <>

In general, urea can not only be mixed with water, but also can be mixed with well-rotted organic fertilizer or compound fertilizer. Combining the nutrients in several fertilizers also allows the soil to absorb better. Improving the soil can make crops grow better and better, and urea is actually a neutral fertilizer.

Do not use alkaline fertilizers in the process of top dressing, so as not to cause bad effects on it.

If the top dressing is watered immediately, it will dissolve and decompose and flow with the water into the deep soil, reducing the effect of top dressing, so the top dressing urea can not be watered immediately. Urea is applied to the soil, only after being converted into ammonium bicarbonate, it can be absorbed in large quantities, because there is a conversion process, so the fertilizer response is relatively slow, and it is generally applied 4-6 days in advance.

Urea topdressing is followed by watering in a few days, 2-3 days in summer, and 4-7 days in winter.

Watering in a few days is better, which can make this absorption better and the land better.

If the urea is irrigated immediately after application, it will be dissolved by water, because the adsorption force between the soil colloid and urea is very weak, the fluidity of urea in the soil is very large, especially the large water flood irrigation, which will make the urea leach to the deep layer and reduce the fertilizer efficiency. Therefore, it is not advisable to irrigate immediately after topdressing urea, and the statement of topdressing urea before rain is even more unscientific.

Because watering immediately after urea topdressing will dilute urea, so that urea's nutrients are lost, and can not be well absorbed by crops, so it is generally watered one day after urea topdressing.

When urea meets water, it undergoes a hydration reaction, releases heat and then burns the seedlings.

Urea is a very common nitrogen fertilizer. It is commonly used in the agricultural sector. Use it instead of farmyard fertilizer.

It can be used as a base fertilizer or top dressing. It can be used in both dryland and paddy fields. Immediately after urea topdressing, or for a few days?

Why? Township vegetables are also cultivated. People have not been found to use urea for fertilization.

First, understand some characteristics of urea

Urea is easily soluble in water. After application, it is hydrolyzed by the soil and absorbed by the roots of the crop. Ammonia, which is formed by the decomposition and conversion of urea, is more volatile, affecting absorption and causing waste.

Therefore, urea cannot be applied directly to the soil. On the ground, it is necessary to dig up the soil and cover it with urea.

Second, urea top dressing, watering options

Knowing some of the properties of urea, now let's talk about the use of urea top dressing, growing rice in a paddy field and growing rice in a paddy field examples.

1.Fertilize the corn with urea

When using urea for top dressing, farmers dig a hole about 12cm from the roots of the corn and spray urea onto the hole and then cover the soil. Allow corn to better absorb urea nutrients. When farmers top dressing on corn, they don't choose top dressing when the soil is dry.

Instead, they dig when the soil moisture is more appropriate after the rain stops.

Of course, if there is less dry rain in the area, you can also choose to apply urea to urea on a cloudy day before the rain when the weather forecast is raining. Urea is applied to deep soils, and corn fields are also ridged and planted. Rainwater drainage, not afraid of flooding, not afraid of washing away urea fertilizer, fertilizing on cloudy days before rain,When it rains, the soil moisture is suitable, which is more conducive to urea absorption.

That is to say,The soil contains a certain amount of water to promote the conversion and absorption of ureaTherefore, if the soil is relatively dry, after urea topdressing, it is possible to water immediately without waiting for a few days, the watering is covered by the soil, and then it is drenched on the soil. When water seeps in, the soil layer becomes wet. If the soil is not dry, do not water it immediately.

2. Top application of rice with urea

Rice is grown in rice paddy fields, whereas paddy fields have more water. It is common to fertilize rice with rice. The practice is to reduce the water in the paddy field and then spray it about a centimeter above the surface of the soil.

It usually takes 5-7 days after urea application so that the water can be left unirrigated into the field.

Another method is to drain less, where the water does not pass through the surface of the mud, and then spray urea. The farmer then stomps on the soil with his feet, stirs the mud, and then applies urea to the deep soil. It also makes the rice soil loose and breathable, which is conducive to the absorption of nutrients.

This method usually takes about a week or so to re-irrigate the water.

In this way, after sprinkling urea on the rice, it is not necessary to water it immediately, but to wait for a week. Not only are maize and rice applied urea, but other crops in arid regions are also of concern. It can be handled according to the situation.

The administration of urea should be deep. If the soil is dry, then pour it into the soil and water it after covering the soil. Allow the soil layer to moisten.

I think it's probably better to water it right away, so that the urea can also fuse.

I think it will be better for the land if I water it in a few days.

I think this should be watered immediately, quickly and accurately, otherwise the effect of urea will be gone.

For this kind of thing, it is generally better to water it after a few days.

It's not that ether can't be watered after application, but it will cause a lot of waste after watering. Two characteristics of ether have been mentioned, one is converted to ammonium carbonate (or bicarbonate) in order to be absorbed by plants, and the second is easily soluble in water. Water it directly, and the elements will quickly dissolve in water.

At this time, the water will sink into the soil, and the ether will penetrate deeper into the soil with the water, and if the roots of the crop are not so deep, the utilization rate will naturally decrease. One more thing, during the process of watering, urea flows along the water flow to a part of the field, especially in the case of flooding, the loss rate increases.

Ether helps crops grow, but too high a concentration can cause fertilizer damage, the water flow during watering will form pits in the roots of crops, and ether is easy to dissolve in water. The concentration of ether is too high in the local area range, which leads to the production of fertilizer by crops, under closed and poorly ventilated cultivation conditions. Ether carbamidite cannot be directly absorbed by plants and must be hydrolyzed with ammonia nitrogen to be absorbed by plants.

It does not affect the acidity and alkalinity of the soil. In general, the rate of hydrolysis in acidic soils is faster and the fertilizer utilization rate is also higher, while in alkaline soils, the rate of hydrolysis is slower and the uptake by plants is slower. Therefore, urea generally cannot be mixed with alkaline fertilizer when fertilizing, which can decompose urea into ammonia and evaporate, reducing fertilizer utilization rate.

Generally speaking, urea is sprayed directly in the field, exposed to air, and will volatilize in large quantities after being converted into ammonia nitrogen, so urea is generally buried in the soil, and the blood depth is best about 15 cm. Alternatively, apply on the side of a crop such as rice and cover it with soil.

Ether is easily soluble in water, and some farmer friends sprinkle barley and water in the field. It is believed that this will accelerate the dissolution of ether and promote the effect of fertilizer. It's not like that.

After dissolving ether directly in water, if the soil is not absorbed in a short time, the fertilizer will volatilize in large quantities, thus greatly reducing the utilization rate of ether. If it is flooded water, elemental particles may be lost along with the water.

In order to exert the fertilizer effect, the soil should not be too dry before fertilization. Otherwise, the effect of the fertilizer will be prolonged. Therefore, if the soil moisture is suitable, you can walk after spraying urea for about 10 days, and if the soil is relatively dry, you can consider watering in advance appropriately, and you can walk after spraying for about 5 days.

When walking, it is strictly forbidden to flood, choose small water to pour slowly, control the amount of inflow and outflow, and prevent the loss of fertilizer and water. After removing the water, the field should be dried for a period of time, and if there is a drought, it can be watered again. If there is water in the field or it is relatively wet, it is best to add ether and rake it with a tool and cover the ether under the soil.

It is necessary to wait for half a day to continue watering, and this will also increase the yield or growth rate of the plant.

The hydrolysis time of urea in the soil needs more than 4 days, so it needs to be used 4 days in advance when using urea in agricultural production, so as to avoid the defertilization of crops due to the inability to absorb nitrogen fertilizer during the peak period of fertilizer demand, resulting in reduced yield.

Forty-eight hours later, but it depends on the topdressing method of urea, if it is buried in the field, it can be watered at an interval of forty-eight hours, if it is sprinkled directly in the field, it needs to be watered directly after sprinkling.

Wait at least a day before watering, otherwise it will dilute the nutrients of urea and make it impossible for plants to absorb.

Summary. Hello, glad for your question. Urea mixed with water watering vegetables is generally watered at intervals of one week to ten days, and compound fertilizer can be applied.

When diluted with water, the concentration of fertilizer will be lower, so that vegetables can be better absorbed. If the basal fertilizer is applied when cultivating, the soil is fertile, and the number of fertilization should be reduced, just once in half a month or so, and it can be applied two or three times.

Hello, it's a pleasure to answer your questions. Urea mixed with water watering vegetables is generally watered at intervals of one week to ten days, and compound fertilizer can be applied. After diluting the reeds with water, the concentration of fertilizer will be lower, so that the vegetables can be better absorbed.

If you apply basal fertilizer when cultivating, the soil is fertile, and the number of fertilization should be reduced, just once in half a month or so, and you can apply it two or three times.

Compound fertilizer needs to be used on rainy days, right?

Sheep manure is topdressing on a rainy or cloudy day.

Compound fertilizer can not be used on rainy days, but can only be used on cloudy days or after the sun goes down in the afternoon.

Urea is a fertilizer with a very high nitrogen content, which is often applied to crops in rural areas to stop topdressing, and is deeply loved by farmers because of its high nitrogen content.

In order to save trouble, many people will throw urea to the surface of the soil or the roots of crops, in fact, it is easy to cause urea volatilization, and the application rate is only 30%, which seriously wastes fertilizer. The best practice is to apply in furrows or holes, and stop covering the soil after application, so as not to waste money and maximize the use of urea.

Urea applied to the soil will not be directly absorbed by crops, and needs to be synthesized into ammonium carbonate by microorganisms in the soil and then absorbed by crops. Because the nature of ammonium carbonate is very unstable, it is easy to be synthesized into ammonia and volatilized, so if urea is applied to the surface, it is easy to volatilize and waste fertilizer effect.

Urea cannot be adsorbed in the soil before being converted into ammonium carbonate, and if it rains heavily or irrigates with heavy water after applying urea, urea will dissolve into the water and sink into the soil 20 cm deep with the water, or with the loss of water, it is not easy to be absorbed by the roots of the crop. The time for urea to be synthesized into ammonium carbonate in the soil is affected by temperature, with high temperatures for 2-3 days in summer and 6-7 days in spring and autumn. Therefore, after urea application, you can wait for 2-3 days in summer and 6-7 days in spring and autumn to stop watering and irrigating crops, so that the application can be maximized.

Urea is a high-concentration nitrogen fertilizer, which is a neutral fast-acting fertilizer, and can also be used to consume a variety of compound fertilizers. It is suitable for a wide range, easy to keep, simple to use, is a chemical fertilizer with a large amount of use at present. Urea is an amide nitrogen fertilizer, which is easily soluble in water, and should be converted into ammonia nitrogen in the field to be absorbed and used by the roots.

In the process of transformation, the transformation time should be determined according to the detailed condition of the soil in the field, if watered immediately after application, urea will be directly dissolved in water and lost, losing its effect, forming a fertilizer cost.

Urea is a high-concentration nitrogen fertilizer, so the application rate should not be too large, and attention should be paid to the appropriate application to prevent the formation of glutinous fees. And when spraying on the foliar surface, the concentration should not be too large, otherwise it is easy to burn the leaves and poison the plants.

It should be watered immediately, so that the urea can melt quickly, and then the plant can be better absorbed, and the moisture of the soil must be ensured, so that the plant can take root and sprout.