Why is urea not suitable for seed fertilizer? During the process of planting agricultural materials, some farmers lacked the common sense of science and technology, did not understand the molecular structure and chemical properties of chemical fertilizers, and blindly applied urea as a seed fertilizer. Due to improper methods or excessive use, the results showed that the seedlings were burnt and burned, resulting in the lack of seedlings and ridges leading to reduced production. Lessons from production practice tell us that urea is not suitable for seed fertilizer.
Urea is a physiochemical neutral fertilizer with ammonia content of 46.3%. It is the inorganic chemical fertilizer with the highest nitrogen content in solid nitrogen fertilizer. Urea is white or light yellow crystal, granular and soluble in water, suitable for base fertilizer or top dressing. Long-term application in the soil does not leave any toxic substances, no adverse consequences. However, urea is generally not suitable for seeding at the time of sowing. If it is applied as a seed fertilizer, the lack of moisture, methods and standards are not well mastered, and high concentrations of urea will affect seed germination and root growth. Because urea is produced in the granulation process, a small amount of biuret is produced when the temperature is too high, which has an inhibitory effect on crop growth. When the biuret content exceeds 1%, it is impossible to make seed fertilizer and fertilizer. If it is really required to be applied as a seed fertilizer, it must be kept under the conditions of ankle and should be isolated from the seed, strictly controlled to not more than 5 kg per acre, mixed with fine soil, sprinkled 2 to 3 cm below the seed to ensure the seed. Germination, normal growth of seedlings, and smooth emergence.
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