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尿素是在1773年由法国化学家罗雷从人尿中发现的有机化合物。它是人和哺乳动物蛋白质新陈代谢的最终产物。成人每天尿中就有二三十克尿素,占了人尿总氮量的80—90％,是尿中氮肥的主要来源。尿素作为肥料,优点很多。首先是肥分高。尿素含氮量达46.65％,比硫酸铵高一倍多,比硝酸铵高30％。其次是对土壤没有副作用。当它施入水田或旱田的土壤中后,受到微生物及其分泌的尿素酶的作用,就逐渐分解成碳酸铵,接着又分解出氨。在
Urea is an organic compound that was discovered in human urine by French chemist Rowe in 1773. It is the final product of human and mammalian protein metabolism. In adult urine, there are twenty to thirty grams of urea every day, accounting for 80-90% of the total human urine nitrogen, which is the main source of nitrogen in urine. Urea as a fertilizer has many advantages. The first is the high fat points. The nitrogen content of urea is 46.65%, which is more than double that of ammonium sulfate and 30% higher than ammonium nitrate. The second is no side effects on the soil. When it is applied to soil in a paddy field or a dry field, it is gradually decomposed into ammonium carbonate by the action of microorganisms and urease secreted by it, and then decomposed out of ammonia. in