氨挥发是化肥损失的重要途径， 同时加剧了温室气体排放和水体富营养化。 限于技术和资金条件， 国内外氨挥发研究主要使用静态闭路箱法、 半开放法、 间歇通气法、 质量平衡法及风洞法。 文章利用FTIR光谱法， 基于HITRAN数据库采用非线性最小二乘拟合气体浓度反演算法， 测量对比了不同化肥的氨挥发， 并简单分析了原因。 试验表明， FTIR分析技术用于化肥的氨挥发测量， 是一种操作简单， 分析效率高， 能满足实时、 连续、 准确要求的测量技术， 可以满足野外田间作业的需要。

In the present paper, the authors used FTIR spectra measurement to analyze the volatilization of NH3 of different fertilizers. With the help of HITRAN database, using NLLS arithmetic, the authors retrieved the concentrations of NH3. The authors compared the concentrations and simply analyzed the reason why the concentrations are different. This experiment indicated that the FTIR spectra measurement used to analyze the volatilization of NH3 has many advantages, such as simple operation, high efficiency, measuring in real time and continuity, so this measurement can completely satisfy the demand of analysis in field.