“长效尿素研制与应用”是甘肃省经贸委和中国科学院兰州分院的合作项目 ,由中国科学院沈阳应用生态研究所与甘肃省张掖地区化肥厂、甘肃省农业大学资环系承担。 1 999年 1 2月通过了由甘肃省经贸委组织的科技成果新产品鉴定。新型长效尿素是在普通尿素生产过程中添加脲酶抑制 “Development and Application of Long-acting Urea” is a cooperation project of Economic and Trade Committee of Gansu Province and Lanzhou Branch of Chinese Academy of Sciences. It is undertaken by Shenyang Institute of Applied Ecology, Chinese Academy of Sciences and Zhangye Regional Fertilizer Plant of Gansu Province and Gansu Provincial Agricultural University. January 1, 1999 adopted by the Gansu Provincial Economic and Trade Commission organized scientific and technological achievements new product identification. The new long-acting urea is the addition of urease inhibition during normal urea production