Urea autumn deep pay attention

2021-09-08 10:06:21

It has been determined that autumn soil preparation and autumn fertilization plots are 1.7~2.1°C warmer than spring plots, with a 15.8% higher emergence rate and 8.5% increase in yield.

Urea autumn deep application technology must be reasonably applied in order to fully play its role. The core of urea deep application must pay attention to a deep character. Too little fertilizer is an important reason for the low utilization rate of chemical fertilizers. Applying a depth of 10 to 12 cm is conducive to the distribution of available nitrogen in the middle and lower layers of the soil to provide a nitrogen environment for the crop. . Deep application can control the rate of hydrolysis of urea, allowing its nutrients to be evenly released. The amount of fertilizer used in the fall is generally 2/3 of the amount of fertilizer applied in autumn, 1/3 of the amount of fertilizer applied in spring as a seed fertilizer, and applied in the spring at 5-6 cm. The time of urea application must be taken into account. Fertilizer applied too early or shallow urea is converted into ammonium carbonate and ammonium bicarbonate under the action of urease, which is easily decomposed and releases ammonia, which is volatile and has a large loss. If the fertilizer is used too late, The soil is frozen and cannot be applied. In the autumn of urea, it is necessary to pay attention to adherence to standard operations, and to be consistent with each Other, with uniform depth, tight soil covering, applied to the head, applied to the side, and suppressed after fertilization. Autumn urea should pay attention to the autumn and autumn should not pay attention to the autumn, so that the amount of fertilizer is not high quality, fat loss should occur, reduce fertilizer efficiency. Sandy soil has poor fertility, and fertilizer leaching losses are unfavorable.

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