Priority should be given to the application of major crops when considering crops with large acreage and high economic value (such as wheat and corn), while for other minor crops, they may be appropriately or even not according to their own economic conditions. Shi, the targeted increase in fertilizer production.
Used as base fertilizer or top dressing Urea is suitable for use as base fertilizer and top dressing. Under normal circumstances, it is not suitable for seed fertilizer. Because urea easily destroys the structure of the protein, denatures the protein, affects the germination of the seed and the growth of the roots of the seedlings, and in severe cases, the seed loses its ability to germinate.
Used for autumn fertilization For dry land, urea is more effective than spring application. According to relevant tests, under the same conditions, autumn application can increase the utilization rate of urea in the season by more than 10.8%. If urea is applied, it will be better with organic fertilizer and other fertilizers.
Used as a top dressing. Urea as a root dressing is better than other nitrogen fertilizers. The concentration and time of urea sprayed outside the root vary with crop type. Under normal circumstances, each application of urea per acre 0.5-2.5 kg, once every 4-5 days, 2-3 times.
After the urea is applied to the soil in advance, it is hydrolyzed to ammonium bicarbonate by the action of soil microorganisms before being absorbed by the roots of the crop. Therefore, it should be pursued in advance.
The final product of deep-covering urea decomposition in soil is ammonium carbonate. Ammonium carbonate is very unstable. It decomposes in the soil or on the soil surface to form free ammonia, which is volatile and volatile. Therefore, when applying urea, the soil should be applied deeply, and the depth of covering soil is generally 10 cm. about.
Apply as much as possible after rain. Urea has good moisture absorption performance. When performing topdressing in dry land, try to arrange it after rain, so that the fertilizer can be dissolved quickly and absorbed by the soil. At the same time, some fertilizer can be absorbed through the leaves to improve fertilizer efficiency and reduce losses.
Morning or evening application Like other nitrogen fertilizers, urea should be applied in the morning or evening, preferably after rain or on a cloudy day. Avoid applying it at high temperatures on sunny days (or at noon).
Cooperating with other chemical fertilizers Urea is a unit fertilizer. It should be used in combination with phosphate fertilizer or other chemical fertilizers. This can meet the needs of crops for various nutrients, and at the same time can play a role in assisting fertilizers.
Combined with organic fertilizers The combination of urea and organic fertilizers is an effective measure to improve the efficiency of urea. It can improve crop nutrient conditions, reduce production costs, increase production, increase income, etc., thereby improving the economic benefits of fertilizers. Farmhouse manure is best with high quality pig manure. Under normal circumstances, the ratio of urea to pig manure is 1:1.9.
Source: Qinghai Science and Technology News
Used as base fertilizer or top dressing Urea is suitable for use as base fertilizer and top dressing. Under normal circumstances, it is not suitable for seed fertilizer. Because urea easily destroys the structure of the protein, denatures the protein, affects the germination of the seed and the growth of the roots of the seedlings, and in severe cases, the seed loses its ability to germinate.
Used for autumn fertilization For dry land, urea is more effective than spring application. According to relevant tests, under the same conditions, autumn application can increase the utilization rate of urea in the season by more than 10.8%. If urea is applied, it will be better with organic fertilizer and other fertilizers.
Used as a top dressing. Urea as a root dressing is better than other nitrogen fertilizers. The concentration and time of urea sprayed outside the root vary with crop type. Under normal circumstances, each application of urea per acre 0.5-2.5 kg, once every 4-5 days, 2-3 times.
After the urea is applied to the soil in advance, it is hydrolyzed to ammonium bicarbonate by the action of soil microorganisms before being absorbed by the roots of the crop. Therefore, it should be pursued in advance.
The final product of deep-covering urea decomposition in soil is ammonium carbonate. Ammonium carbonate is very unstable. It decomposes in the soil or on the soil surface to form free ammonia, which is volatile and volatile. Therefore, when applying urea, the soil should be applied deeply, and the depth of covering soil is generally 10 cm. about.
Apply as much as possible after rain. Urea has good moisture absorption performance. When performing topdressing in dry land, try to arrange it after rain, so that the fertilizer can be dissolved quickly and absorbed by the soil. At the same time, some fertilizer can be absorbed through the leaves to improve fertilizer efficiency and reduce losses.
Morning or evening application Like other nitrogen fertilizers, urea should be applied in the morning or evening, preferably after rain or on a cloudy day. Avoid applying it at high temperatures on sunny days (or at noon).
Cooperating with other chemical fertilizers Urea is a unit fertilizer. It should be used in combination with phosphate fertilizer or other chemical fertilizers. This can meet the needs of crops for various nutrients, and at the same time can play a role in assisting fertilizers.
Combined with organic fertilizers The combination of urea and organic fertilizers is an effective measure to improve the efficiency of urea. It can improve crop nutrient conditions, reduce production costs, increase production, increase income, etc., thereby improving the economic benefits of fertilizers. Farmhouse manure is best with high quality pig manure. Under normal circumstances, the ratio of urea to pig manure is 1:1.9.
Source: Qinghai Science and Technology News
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