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应用不同煤源及加工方式生产的二种腐植酸类物质作为脲酶抑制剂，进行了二年盆栽一年田间小区的试验研究。表明了选用煤炭腐植酸类物质作为脲酶抑制剂是可行的。它既能减缓尿素分解，以提高尿素利用率和减少氮素对环境的污染，又能显著地改善作物根系活性和对土壤养分的有效利用率。且其原料易得、加工简便，对环境无污染，对生物无毒害，并在开发利用风化煤之类资源的同时，又改善了环境条件。
Two kinds of humic acids produced by different coal sources and processing methods were used as urease inhibitors. Two-year pot experiment was conducted in field plots. It shows that it is feasible to use coal humic acid as urease inhibitor. It can not only slow down the decomposition of urea to improve urea utilization and reduce nitrogen pollution on the environment, but also significantly improve crop root activity and effective utilization of soil nutrients. The raw materials are easy to obtain, the processing is simple, the environment is non-polluting, the organism is non-toxic, and environmental resources are improved while utilizing resources such as weathered coal.