目前我国碳铵的施用量约占全国氮肥施用量的50％以上，但因客观因素的影响，当前，碳铵的肥效利用率仅有17-25％，为了有效地提高碳铵氮素的利用率，中国科学院沈阳应用生态研究所研究出一种可提高碳铵氮素利用率的长效碳铵肥料新品种．所谓长效碳按，就是在生产普通碳铵过程中 At present, the application of ammonium bicarbonate accounts for more than 50% of the national nitrogen fertilizer application. However, due to the objective factors, at present, the utilization rate of ammonium bicarbonate is only 17-25%. In order to effectively improve the utilization of ammonium bicarbonate Rate, Shenyang Institute of Applied Ecology, Chinese Academy of Sciences has developed a new type of long-acting ammonium bicarbonate fertilizer that can improve the utilization efficiency of ammonium bicarbonate. The so-called long-carbon, is in the production of ordinary ammonium bicarbonate process