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长效尿素是中国科学院沈阳生态研究所与辽宁省盘锦化肥厂、黑龙江省浩良河化肥厂共同开发、生产的一种新型氮素化肥。主要是在普通尿素中添加一定比例的尿酶抑制剂。目的在通过抑制土壤中脲酶的活性,使尿素分解缓慢,氮的挥发量减少,以提高其利用率。一般比普通尿素供作物吸收利用的时间延长40～70天。可节约化肥20％。二龙山农场1989～1990年对小麦、大豆、甜菜、玉米进行了示范,其结果如下。
Long-acting urea is a new type of nitrogenous fertilizer developed jointly by Shenyang Institute of Ecology, Chinese Academy of Sciences and Panjin Fertilizer Plant of Liaoning Province and Haolianghe Fertilizer Plant of Heilongjiang Province. Mainly in ordinary urea to add a certain percentage of urease inhibitors. Purpose By inhibiting the activity of urease in the soil, the decomposition of urea slowly, reduce the amount of volatile nitrogen to improve its utilization. General than urea for crop absorption and utilization of the extension of time 40 to 70 days. Can save 20% of fertilizer. Erlongshan Farm From 1989 to 1990, wheat, soybean, beet and corn were demonstrated. The results are as follows.