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本文采用Ｂｒｅｍｎｅｒ法评价了河南省二种主要耕作土壤的氮素构成，着重研究了不同轮作方式对供试土壤氮素构成与氮贮量的影响。结果表明：不同土类的氮构成有较大差异，轮作方式影响土壤氮素构成。夏闲一小麦轮作５年使土壤酸水解氮数量，尤其是氨基醣－Ｎ和未知态－Ｎ明显减少；柽麻－小麦轮作能显著提高供试土壤氮贮量和氮质量；隔年轮种一次绿肥从培肥地力和生产实际考虑是较适宜的。
In this paper, Bremner method was used to evaluate the nitrogen composition of two main cultivated soils in Henan Province. The effects of different rotation modes on the nitrogen composition and nitrogen storage of the soils were studied. The results showed that there was a big difference in nitrogen composition between different soil types, and the rotation mode influenced the soil nitrogen composition. Summer wheat rotation for 5 years makes the amount of soil acid hydrolyzed nitrogen, especially the amount of amino sugar N and unknown state-N decreased significantly; Canola-wheat rotation can significantly improve soil nitrogen storage and nitrogen quality of tested soil; Fertilizer green manure fertility and production from the actual consideration is more appropriate.