Long-acting nitrogen fertilizer is suitable for all kinds of crops and various soil conditions. There are two main types of long-acting nitrogen fertilizers currently used in China: long-acting urea and long-acting ammonium bicarbonate. The application method is basically the same as urea and ammonium bicarbonate. The specific application points are as follows:
The nitrogen release from long-acting nitrogen fertilizer is relatively slow, and the peak release period is about 5 days later than urea, so it should be earlier than the regular application period of urea. Generally, early spring is 5-6 days ahead of schedule, and summer is 3~4 days ahead of schedule.
Long-acting nitrogen fertilizer has strong nitrogen retention capacity in soil and high utilization rate. Therefore, its dosage is slightly less than that of normal nitrogen fertilizer. It is usually 10% to 15% less than the constant.
Due to the different soil quality, the absorption and preservation ability of long-acting nitrogen fertilizer in the soil is also significantly different. The absorption and preservation ability of clay is strong, and the amount of clay can be more; the sandy soil should be applied in small amounts multiple times.
Long-acting nitrogen fertilizer should be applied scientifically according to the different nitrogen absorption characteristics of crops. Jiang Hongtao
This article URL: attention points for long-acting nitrogen fertilizer application
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