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在普遍尿素的生产工艺中分别加入一定比例的无机矿物改性剂，研制出３种改性尿素。盆栽结果显示，在等质量及等Ｎ施肥条件下，３种改性尿素均有较大幅度的增产。淋溶实验表明，改性尿素与德国缓释尿素的淋溶曲线相似。
Urea in the general production process were added to a certain percentage of inorganic mineral modifiers, developed three kinds of modified urea. Potted results showed that under the condition of equal mass and equal fertilization, all three kinds of modified urea had a significant yield increase. Leaching experiments showed that the leaching curves of modified urea and German sustained-release urea were similar.