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尿素是目前市场上最浓缩的固体氮肥,物理性状好,不产生对土壤有害物质,是我国重点发展的氮肥品种,施用中的主要问题是挥发损失严重。因而利用率不高。尿素是易溶于水的有机化合物。溶于水后不像其他氮素化肥(无机盐类)那样电离为正负离子。施入土壤后,在土壤微生物的作用下,很快转化为碳酸铵,而碳酸铵为易挥发的盐类。因而施用尿素,同施用其它铵
Urea is the most concentrated solid nitrogen fertilizer on the market. Its physical properties are good, it does not produce harmful substances to the soil, and it is a nitrogenous fertilizer species that is mainly developed in China. The main problem in the application is the serious loss of volatilization. Therefore, the utilization rate is not high. Urea is a water-soluble organic compound. Dissolved in water, unlike other nitrogen fertilizers (inorganic salts) ionized as positive and negative ions. When applied to the soil, it is rapidly converted to ammonium carbonate by the action of soil microorganisms, while ammonium carbonate is a volatile salt. Thus urea is administered, with the other ammonium used