尿素，又稱碳酰胺（carbamide)
，是由碳、氮、氧、氫qing組zu成cheng的de有you機ji化hua合he物wu是shi一yi種zhong白bai色se晶jing體ti。最zui簡jian單dan的de有you機ji化hua合he物wu之zhi一yi，是shi哺bu乳ru動dong物wu和he某mou些xie魚yu類lei體ti內nei蛋dan白bai質zhi代dai謝xie分fen解jie的de主zhu要yao含han氮dan終zhong產chan物wu。也ye是shi目mu前qian含han氮dan量liang最zui高gao的de氮dan肥fei。

作zuo為wei一yi種zhong中zhong性xing肥fei料liao
，尿niao素su適shi用yong於yu各ge種zhong土tu壤rang和he植zhi物wu。它ta易yi保bao存cun，使shi用yong方fang便bian，對dui土tu壤rang的de破po壞huai作zuo用yong小xiao，是shi目mu前qian使shi用yong量liang較jiao大da的de一yi種zhong化hua學xue氮dan肥fei。工gong業ye上shang用yong氨an氣qi和he二er氧yang化hua碳tan在zai一yi定ding條tiao件jian下xia合he成cheng尿niao素su。