Priority should be given to the consideration of crops with large areas of cultivation and high economic value (such as wheat and maize) when they are applied. For other minor crops, they may be appropriately applied or not appropriate to their own economic conditions. Shi, to play a targeted role in the increase of fertilizer production.
As basal fertilizer or top-dressing urea, it is suitable for basal fertilizer and topdressing, and it is generally not suitable for seed fertilizer. Because urea easily destroys the structure of the protein and denatures the protein, it affects the germination of the seed and the growth of the root of the seedling, which can cause the seed to lose its ability to germinate.
For autumn fertilization For drylands, the effect of applying urea in autumn is much better than in spring. According to relevant experiments, under the same conditions, autumn planting can increase the utilization ratio of urea by more than 10.8% over the spring season. If urea is used, organic fertilizers and other fertilizers will be used to better effect.
It is better to use topdressing fertilizer urea as extra-root fertilizer than other nitrogen fertilizers. The concentration and time of urea spraying outside the root varies with the type of crop. Under normal circumstances, each application of urea 0.5-2.5 kg, once every 4-5 days, 2-3 times.
After applying topdressing urea into the soil, it is first hydrolyzed to ammonium bicarbonate by the action of soil microorganisms before it can be absorbed by the crop roots. Therefore, it should be pursued in advance.
The final product of deep-buried urea decomposition in soil is ammonium carbonate. Ammonium carbonate is very unstable and decomposes into free ammonia in the soil or on the surface of the soil to form volatile free ammonia. Therefore, when urea is applied, it should be deeply covered with soil, and the depth of cover soil is generally 10 cm. about.
Utilize urea as much as possible after the rain to absorb moisture. When applying topdressing in dryland, try to arrange it after rain so that the fertilizer dissolves quickly and is absorbed by the soil. At the same time, some fertilizers can also be absorbed through the leaves to increase fertilizer efficiency and reduce losses.
The application of urea in the morning or evening is the same as that of other nitrogen fertilizers. The application time of urea should be in the morning or evening, preferably after the rain or cloudy days. Avoid using in sunny (or noon) high temperatures.
The application of urea in combination with other chemical fertilizers is a unit fertilizer, which should be used in combination with phosphate fertilizers or other fertilizers. This will not only meet the needs of crops for various nutrients, but also help the fertilizers.
The application of urea and organic fertilizers in conjunction with organic fertilizers is an effective measure to increase the efficiency of urea fertilizers, which can improve crop nutrient conditions, reduce production costs, increase production, increase income, and so on, thereby increasing the economic efficiency of fertilizers. Farmyard manure is best with high-quality pig manure. Under normal circumstances, the ratio of urea to pig manure is 1:1.9.
Organic Rice refers to the Rice planted in the process of planting rice, using natural organic cultivation methods, and completely using natural farming methods. Organic rice must be a good quality rice variety recommended by the planting improvement field, and chemical fertilizers, pesticides and growth regulators cannot be used during the cultivation process.
Organic Rice
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