Wheat spring fertilizer winter application is to advance the fertilizer to the winter application to increase the nitrogen content of the plant to promote the synthesis of protein for the early growth of spring seedlings to increase the tillering rate.
In the case of suitable humidity, the main factor affecting the regreening in spring is that the temperature is not good for the wheat to return to the green. The spring fertilizer can delay the time of pouring back to the Qingshui and enhance the heat absorption capacity of the soil to provide sufficient nutrition for the early spring seedlings.
The bottom of the fertilizer is sufficient to sow the earlier wheat fields. Some of the pre-winter long stems and the number of stems are more than one million. The available nutrients are consumed in large quantities in the spring. The spring fertilizer can supplement the fertilizers and stabilize the effective number of tillers.
Spring-fertilizer winter application should be due to the seedlings: the number of acres of stems less than 600,000 acres of standardized fertilizer (ammonium sulfate) 12.5--15 kg; the number of acres of stems between 60--900,000 5-10 kg; The number of acres of stems exceeds one million for 5 - 7.5 kilograms. Conditional can be combined with the application of 15-25 kg of phosphate fertilizer. But the phosphate fertilizer must be concentrated in the ditch. Do not apply if combined with frozen water. When the flow rate of the water after the inflow is significantly reduced, it is evenly applied. For example, before the watering, the ditch depth is generally 3.3--6.6 cm. Be careful not to injure the seedlings. If possible, use the ditch as a good.
The lyrical foot\planting late wheat field does not need to be ditched during winter irrigation. If the wheat seedlings are not distributed, the amount of fertilizer can be increased to 20 kg per mu.
Dry and thin land should also be ditched to deepen the depth of the ditch 5.-6.6 cm per mu 20 kg at the same time pay attention to the pre-winter repression and play the role of fertilizer as soon as possible.
Saline-alkali land should not be fertilized in winter.
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