In the autumn, the temperature starts to go down, and the crop fertilization should master the skills:
1 should be applied to ammonium bicarbonate. When the temperature is low, the ammonium bicarbonate is not volatile and decomposes, which is beneficial to improve the fertilizer utilization rate: ammonium bicarbonate belongs to ammonium nitrogen fertilizer. After being applied to the soil, it can be directly absorbed and utilized by the crop, and the fertilizer efficiency is fast, which is a typical "quick-acting fertilizer". Nitrogen nutrition can be provided to crops in a timely manner. Some people have done experiments to apply ammonium bicarbonate in low temperature wheat fields, and the effect is 1 to 1.5 times higher than that in high temperature seasons.
2 Avoid applying urea. Urea belongs to the ammonium amide fertilizer. It can not be directly absorbed and utilized by crops after being applied to the soil. It needs to be converted into ammonium nitrogen by the urease secreted by urea bacteria in the soil to be absorbed by the roots. Here, the rate of urea conversion depends mainly on the soil temperature at that time; under normal conditions, all urea applied to the soil is converted to ammonium nitrogen, which takes 7-10 days at a ground temperature of 10 °C and 4 ° at 20 °C. 5 days, only 2 to 3 days at 30 °C. It can be seen that the crops are topdressed in winter or early spring. If urea is applied, it tends to affect crop growth because of the slow effect of fertilizer.
3 Increase the application of phosphorus and zinc fertilizer. The absorption of phosphorus and zinc by crops is significantly affected by temperature and light. In autumn and winter, the temperature is low and the light is insufficient. It is easy to induce phosphorus and zinc deficiency in wintering crops. Phosphate fertilizer and zinc fertilizer should be added appropriately. In addition, phosphorus can enhance the cold resistance of plants, and the application of phosphorus fertilizer is also beneficial to prevent crops from being frozen.
1 should be applied to ammonium bicarbonate. When the temperature is low, the ammonium bicarbonate is not volatile and decomposes, which is beneficial to improve the fertilizer utilization rate: ammonium bicarbonate belongs to ammonium nitrogen fertilizer. After being applied to the soil, it can be directly absorbed and utilized by the crop, and the fertilizer efficiency is fast, which is a typical "quick-acting fertilizer". Nitrogen nutrition can be provided to crops in a timely manner. Some people have done experiments to apply ammonium bicarbonate in low temperature wheat fields, and the effect is 1 to 1.5 times higher than that in high temperature seasons.
2 Avoid applying urea. Urea belongs to the ammonium amide fertilizer. It can not be directly absorbed and utilized by crops after being applied to the soil. It needs to be converted into ammonium nitrogen by the urease secreted by urea bacteria in the soil to be absorbed by the roots. Here, the rate of urea conversion depends mainly on the soil temperature at that time; under normal conditions, all urea applied to the soil is converted to ammonium nitrogen, which takes 7-10 days at a ground temperature of 10 °C and 4 ° at 20 °C. 5 days, only 2 to 3 days at 30 °C. It can be seen that the crops are topdressed in winter or early spring. If urea is applied, it tends to affect crop growth because of the slow effect of fertilizer.
3 Increase the application of phosphorus and zinc fertilizer. The absorption of phosphorus and zinc by crops is significantly affected by temperature and light. In autumn and winter, the temperature is low and the light is insufficient. It is easy to induce phosphorus and zinc deficiency in wintering crops. Phosphate fertilizer and zinc fertilizer should be added appropriately. In addition, phosphorus can enhance the cold resistance of plants, and the application of phosphorus fertilizer is also beneficial to prevent crops from being frozen.
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