Urea is the highest nitrogen content in solid nitrogen fertilizer, and it is suitable for all kinds of soils and various crops, especially for topdressing. The effect is good. Therefore, since the urea has been used, most farmers generally use urea as top dressing, but the experiment proves: It is better to use ammonium bicarbonate instead of urea when the wheat is greened. Why?
The farmer said it well: "The fertilization is also a coincidence, and it is good for the right." It turns out that the crop can not be directly absorbed and utilized by urea. It can only be converted into ammonium carbonate under the action of urinary bacterial enzymes in the soil for root absorption, and the rate of conversion of urea to ammonium carbonate is greatly related to soil temperature. It takes 7 to 10 days at a ground temperature of 10 ° C, 4 to 5 days at 20 ° C, and only two or three days to complete the conversion at 30 ° C.
Wheat returning to topdressing is mainly for wheat fields with weak seedlings, insufficient population or de-fertilization. However, since the ground temperature of wheat is still below 10 °C when it returns to green, if topdressing is combined with watering, it often causes mistakes due to slow effect of fertilizer efficiency. In contrast, ammonium bicarbonate is applied to the soil and is likely to be absorbed and utilized by wheat, and the fertilizer efficiency is much faster than that of urea. (Lv Jizeng)
The farmer said it well: "The fertilization is also a coincidence, and it is good for the right." It turns out that the crop can not be directly absorbed and utilized by urea. It can only be converted into ammonium carbonate under the action of urinary bacterial enzymes in the soil for root absorption, and the rate of conversion of urea to ammonium carbonate is greatly related to soil temperature. It takes 7 to 10 days at a ground temperature of 10 ° C, 4 to 5 days at 20 ° C, and only two or three days to complete the conversion at 30 ° C.
Wheat returning to topdressing is mainly for wheat fields with weak seedlings, insufficient population or de-fertilization. However, since the ground temperature of wheat is still below 10 °C when it returns to green, if topdressing is combined with watering, it often causes mistakes due to slow effect of fertilizer efficiency. In contrast, ammonium bicarbonate is applied to the soil and is likely to be absorbed and utilized by wheat, and the fertilizer efficiency is much faster than that of urea. (Lv Jizeng)
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