本文研究了土壤中不同含氮组份,其中包括全氮、水解性氮、非水解性氮、氨基态氮、可矿化态氮、不易矿化态氮和固定态接的δ~(15)N质谱测定方法,特别对样品的制备方法、方法的准确性和重现性进行了多次试验.结果表明,方法具有良好的精密度,样品分析的重复误差不超过0.35个δ值.经对IAEA提供的标准硫酸铵样品的测定,证明了方法的准确度. In this paper, the effects of various nitrogenous components in soils, including total nitrogen, hydrolyzable nitrogen, non-hydrolyzable nitrogen, amino nitrogen, mineralizable nitrogen, non-readily mineralizable nitrogen and stationary δ ^ N mass spectrometry, especially for the preparation of the sample, the accuracy and reproducibility of the method were tested several times.The results show that the method has good precision, the repeat error of the sample analysis does not exceed 0.35 δ value. The determination of standard ammonium sulfate samples provided by the IAEA demonstrates the accuracy of the method.