Can mixing urea with salt be used for weed control? Does the mixture of urea and salt have a weed-killing effect?

Can urea mixed with salt kill weeds?Today's tip on life experience involves whether urea mixed with salt can kill weeds. Let's follow the editor to see the specific content!Can urea mixed with salt kill weeds?Urea has very strong permeability, similar to water, and can easily penetrate into plants. Moreover, urea can slightly burn the leaves of plants, causing them to produce self-protection and speed up absorption. Therefore, mixing urea with herbicides can enhance the herbicidal effect. So, using urea and salt together can indeed have a herbicidal effect.Farmers are all familiar with urea, whether it's used as a base fertilizer or as a top dressing during critical growth periods of crops, it can play a good role.However, as a high-nitrogen single-component fertilizer, urea must be isolated from the seed when used as a base fertilizer, and it should be avoided to spray on the foliage during high temperatures and with high concentrations to prevent leaf burning.Moreover, the utilization rate of urea for broadcasting is very low. Some say it can reach 20%, but I believe it's less than 10%.The commonly used "golden combination" schemes for urea are as follows: five types, including adding a moderate amount of urea when applying herbicides, which can accelerate the speed of the solution and enhance the effect.One jin (500 grams) of urea with 125 grams of neutral laundry detergent can effectively prevent aphids, caterpillars, and red spiders; urea mixed with potassium dihydrogen phosphate can promote strong seedlings and growth.Urea mixed with glucose can reduce the incidence of downy mildew and powdery mildew; urea mixed with compound nitrilotriacetic acid sodium can make leaves turn green quickly and accelerate root growth.Recently, some teachers have published online that using urea and salt can act as a herbicide. Can it really achieve the goal of killing weeds? What are the disadvantages? Let's analyze it!I. Urea and SaltUrea has very strong permeability, similar to water, and can easily penetrate into plants. Moreover, urea can slightly burn the leaves of plants, causing them to produce self-protection and speed up absorption. Therefore, mixing urea with herbicides can enhance the herbicidal effect.Now let's look at salt. The main chemical component of salt is sodium chloride, which has a higher osmotic pressure compared to the relatively lower osmotic pressure of cell sap in plant cells.This leads to a situation where plant cells cannot absorb water or are even drawn outwards, causing the cells to lack water and unable to function normally, naturally withering.It's like when we use salt to remove a big tree; the tree's roots come into contact with saline water and dehydrate, blocking nutrient transport, causing the roots to dehydrate and die quickly.Therefore, using urea and salt together can have a herbicidal effect.II. Complexing MethodThe complexing method is also simple. It is recommended that farmers mix 150 grams of urea and 50 grams of salt with 15 kilograms of water, stir well, and then spray.III. Precautions1. We cannot spray it directly on crops because urea and salt can cause rapid dehydration of plant roots. Therefore, it can damage both crops and weeds, and can only be used on bare ground and between crop rows.2. Urea is better not used alone on weeds, as the concentration is not enough; it may not kill the weeds but could cause them to grow wild. Therefore, when using urea to kill weeds, it must be mixed with pesticides or salt. For example, urea mixed with glyphosate or glufosinate.3. For malignant weeds, such as water spinach, reeds, cogongrass, nutlets, smallflower bindweed, horsegrass, and field bindweed, this formula should not be used, as it won't have much effect. Generally, herbicides can't remove them, and this small formula won't be able to either.4. The best time to use it is during high temperatures, which can burn the leaves better, and a higher concentration can enhance the effect.5. This method cannot completely remove weeds and is not cost-effective; it may even be more expensive than using pesticides. For small plots of land, you can try using it, such as around greenhouses where you're afraid that pesticides might damage the crops. However, it is not recommended for large-scale weeding and should not be used for pre-planting sealing, as it won't have any effect.In summary, mixing urea and salt can have a certain effect on half of the weeds, but be sure not to spray it on crops, only use it on bare ground and between crop rows. The mechanism of its herbicidal action is merely to cause the dehydration of plant leaves and the stagnation of physiological and biochemical functions, leading to the death of weeds.Some malignant weeds may not have an ideal effect with a single agent, so it's best to use them together. Also, some agents can only be used on bare ground, field edges, and ditches. Moreover, when using it in rows, you must add a protective cover to prevent it from drifting onto crops and causing damage.That's the detailed introduction of whether urea mixed with salt can kill weeds. Have you understood it?