As a nitrogen fertilizer, urea can be used for almost all crops, whether it is base fertilizer, top dressing or foliar spray. However, the utilization rate of urea is very low, only 30-40%, especially in the case of spreading. In order to enrich the usage and effect of urea, we share 5 urea matching schemes for reference only.
1. Urea + herbicide
The solution of urea plus herbicide is more and more accepted by farmers. We know that plant leaves absorb water very quickly. The absorption of urea by crops is close to that of water, which can speed up the absorption of liquid medicine by leaves. Moreover, urea can slightly burn the leaves, making them self-protecting and speeding up the absorption of the medicinal liquid. In addition, the molecules of urea are relatively small, and the dissolved urea has certain adhesiveness, which can stick to the surface of weeds, and the liquid medicine is not easy to be blown off by the wind, so that the weeds die quickly.
How to use: It is recommended that farmers friends add 50-100 grams of urea per 15 kilograms of water when applying herbicides, which can have a very good effect. It should be noted that it is best not to spray pesticides in high temperature weather or during high temperature periods to avoid burning the leaves of crops. It is best to spray pesticides at 5 pm in sunny and windless weather.
2. Urea + washing powder
The effect of urea plus washing powder is definitely there, but the washing powder should be neutral. However, most of the laundry detergents on the market are alkaline, and most of the pesticides are acidic, so pay special attention to this. Personal suggestion, it is best to replace washing powder with silicone additives, the effect is better.
Urea detergent also has another effect, that is, it can inhibit the occurrence of spider mites, aphids, and cabbage caterpillars to a certain extent.
Usage: 100 grams of urea + 25 grams of neutral detergent + 15 kg of water to spray. It should be noted that the washing powder should be dissolved in warm water in advance, and the urea should use small particles of urea with a biuret content of less than 1%, so as not to burn the leaves.
3. Urea + Potassium Dihydrogen Phosphate
After the two are compounded, it is a complete nutrient solution containing nitrogen, phosphorus and potassium, especially when the crops have yellow leaves, fallen leaves, or crops. It can prevent premature aging of plants and enhance photosynthesis.
Usage: It is recommended that farmers spray 30 grams of potassium dihydrogen phosphate + 150 grams of urea + 15 kilograms of water to quickly restore and enhance crop growth.
4. Urea + sodium nitrophenolate
This is the most widely used compound solution at present, and it is also the golden partner of urea. After 3 days of use, it can make the leaves turn green quickly. It is the best synergistic ingredient of urea at present.
Because sodium nitrophenolate is a powerful cell activator, it can enhance the photosynthetic rate of crops, thereby enhancing the thick greenness of crop leaves and accelerating the rooting speed. It can increase the utilization rate of urea to 70%, and extend the fertilizer effect period to about 100 days.
Method of use: Spray 0.2 grams of compound sodium nitrophenolate source powder per mu + 0.2-0.3% urea + 40-50 kg of water; base fertilizer is recommended for every 40 catties of urea + 6 grams of compound sodium nitrophenolate source powder; appropriate amount of urea is recommended for flushing + 8 grams of sodium nitrophenolate source powder.
5. Urea + Glucose
Sugars can promote the growth of crops, provide energy for various physiological activities of crops, and prevent the occurrence of low-sugar diseases. For example, downy mildew and gray mold are low-sugar diseases. Our foliage Spraying sugar substances can prevent and reduce the occurrence of diseases. However, we cannot use brown sugar and white sugar, because they are polysaccharides that cannot be directly absorbed by crops, and they will also block the respiratory pores of crops, and they are easy to attract pests. However, glucose can, because it is a simple sugar that can be directly absorbed by crops.
How to use: It is recommended to spray the whole plant with 15 kg of water + 30-50 grams of urea + 50 grams of glucose, which can not only prevent low-sugar diseases, but also promote fruit color change, reduce acid and increase sweetness, and make the fruit more crystal clear.