What is the concentration of urea aqueous solution, and it does not burn the roots

When irrigating crops, the concentration of urea is generally between 2 8%, pay attention to different crop varieties, the degree of resistance to biuret is different, most crops have poor resistance, and woody plants have greater resistance.

When using urea for foliar fertilizer spraying, the concentration should be lower, generally between 1 5%, and cannot exceed this range, otherwise it will cause fertilizer damage. Of course, different varieties of crops have a great relationship with the natural environment when they are used, and the degree of tolerance to concentration is not the same.

Urea is given to crops, which can be irrigated in the form of water fertilizer, can be diluted into a solution and can be sprayed on the foliar surface, and can also be deeply applied in the soil as base fertilizer and top dressing, and can also be used as seed dressing fertilizer.

On the one hand, after urea is applied to the soil, the soil should have enough water content (generally about 70%-80%), otherwise it will affect the hydrolysis rate of urea and affect the play of fertilizer efficiency. Therefore, if the soil is relatively dry, the soil should be properly irrigated after the application of urea to facilitate the exertion of fertilizer efficiency. Because the nitrogen in urea is easy to release and volatilize, it is advisable to use urea to ditch and cover the soil after application.

In addition, because urea only contains nitrogen (generally 46% pure nitrogen), it can be appropriately mixed with superphosphate, potassium chloride or potassium sulfate, or well-rotted livestock manure for application. As for the question of whether the roots will be burned after the application of urea. It can be said that any kind of fertilizer may have a negative effect on the root system of the crop, mainly depending on the amount of application.

Too much fertilizer is concentrated in the roots of crops, resulting in a lack of water in the root zone products of crops that come into contact with fertilizers, which will cause adverse effects on the root system of crops.

<> irrigating the roots with urea solution, it is generally diluted to a concentration of 300 times or more, and the phenomenon of root burning will not occur. For example, when fertilizing the vines, the urea is diluted into 300 times the solution, and the same amount of potassium dihydrogen phosphate is added at the same time, and the effect is better when it is melted and watered together.

In particular, it is emphasized that solid particles must not be applied, and they should be poured after being turned into a solution, and the concentration must not be high, the concentration of one thousandth is enough, and then it will be burned to death. To add that for potted flowers, it is actually best not to fertilize.

Stay away from the roots of the plant and put it less.

Can urea be used to raise flowers? If you make a wrong step, you will be burned in two days, and the details should be done well when you use it.

First of all, it is necessary to clarify what the concentration unit in the topic is, usually the concentration unit of urea is mg ml or g l. If you follow this criterion, the concentration of 1500 in the question is not a common concentration value and may be incorrect. Therefore, the following calculation process is for reference only, if there is any discrepancy, please refer to the actual situation.

Assuming that the concentration unit in the question is mg ml, then the meaning of one gram of urea to water 1500 concentration is that one gram of urea is dissolved in enough water so that the solution contains 1500 mg of urea per milliliter.

The calculation process is as follows:

1 gram of urea = 1000 mg of urea.

Dissolve 1 g of urea in water and the resulting solution volume is v ml, then:

1500 mg ml = 1000 mg v ml

v = 1000/1500 = ml

That is, dissolving 1 gram of urea in milliliters of water can obtain a urea solution with a concentration of 1500 milligrams.

It should be noted that the solubility of urea varies with temperature and pH value, so it is necessary to adjust the balance in practice. In addition, urea is a chemical that is somewhat toxic and corrosive, requiring attention to safe operation.

We can use the following formula to calculate:

Concentration = grams of the volume of the solution.

Among them, the gram refers to the number of grams of urea, and the volume of the solution refers to the total basal wheel volume of the lysable macrotung liquid where the gram is located, usually in milliliters or liters.

Then, according to the data in the question, the gram of urea is 1 gram, and the volume of the solution is 1500 ml, we can substitute the data into the formula for calculation:

Concentration = 1 1500

Concentration = Therefore, the concentration of one gram of urea to water 1500 is. Usually expressed as:

How to calculate the concentration of 1500 grams of urea to water? One gram of urea mixed with water 1500 grams of concentration should be a ratio of 1500, with a stool to answer this concentration of urea water spray jujube wisdom sprinkling plant leaves, play a good role in growth, is a good way to page top dressing.

Urea is a colorless and transparent crystalline that is widely used in agriculture, manufacturing industrial products, and fertilizers. However, there is a lot of concern about whether urea will fail in water. In this article, we will look at different perspectives on how long does urea fail in water.

Reaction of urea with water.

Urea reacts with water to a certain extent. Normally, after urea is added to water, the carbonyl group in the urea molecule reacts with the hydroxyl group in the water molecule to form a hydroxyurea molecule that is holding each other down. This reaction can effectively prevent the dissociation of urea molecules in water, thus exerting the role of urea as a fertilizer.

Therefore, urea does not immediately fail when it is released into water. On the contrary, the reaction of urea with water can enhance the fertilizer effect of urea. Normally, urea is best in 2-4 hours.

Problems with urea in the water.

Although urea can enhance the fertilizer effect by releasing it into water, there are still some potential problems. If the pH in the water is too high or too low, it will affect the reaction of urea with the water, causing the urea to fail or deteriorate.

In addition, if urea is mixed with water, it may also lead to the decomposition and failure of urea if it is affected by adverse environmental factors such as long-term direct sunlight or high temperature drying. Therefore, before putting urea into the water, the water quality and environmental conditions need to be carefully checked to ensure that the urea can function effectively.

How to use urea fertilizer.

Urea fertilizer is a highly efficient fertilizer that can effectively increase the yield of crops. However, there are a few things to keep in mind when using urea fertilizers:

1.Be careful not to put urea fertilizer on the leaves of the plant to avoid leaf burns.

2.When using urea fertilizer, fertilizer should be applied according to the recommended dosage to avoid overuse and cause rapid and unbalanced crop growth.

3.After urea fertilizer fertilization, sufficient water rights and fertilization opportunities should be given to help urea fertilizer penetrate and function better.

Conclusion In the actual production and use process, we need to pay attention to the reaction between urea and water, so as to better play its role as a fertilizer. Urea should not be left in the water for too long, and the environmental conditions and fertiliser dosage need to be carefully controlled. If these problems can be noted, urea fertilizers can be a powerful means of effectively improving crop production in the field.