有机肥料或化学氮肥施入土壤后,在其转化过程中,会形成大量的氨气等而损失。如何寻求一个简便而有效的方法,准确测出损失的数量,对提高氮肥利用率的研究有重要意义。近几年我们仿制和改进了国外两种测定氨态氮的装置,简单、方便、有一定可靠性,现介绍出来, Organic fertilizer or chemical nitrogen fertilizer applied to the soil, in its conversion process, the formation of large amounts of ammonia and other losses. How to find a simple and effective method to accurately measure the amount of loss is of great significance to the study on improving the utilization rate of nitrogen fertilizer. In recent years, we have imitated and improved two kinds of measuring devices for ammonia nitrogen abroad, which are simple, convenient and have certain reliability. Now we introduce them.