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通过测定加有黑麦草的土壤样品在不同培养时间产生的硝态氮、亚硝态氮、铵态氮和氨态氮数量的变化，研究了有机氮在二种红壤（红砂土和黄筋泥）中的矿化动态．有机氮在红壤中的矿化结果主要是铵的生成和氨的挥发，培养后５ｄ，明显发生铵的释放，红砂土在培养后１５～２０ｄ，铵的释放达到最大值，黄筋泥则是在培养后３０～３５ｄ．在培养的前２０ｄ，红砂土中铵的释放多于黄筋泥，但在３０ｄ后，情况相反．培养期间有机氮矿化释放的氨用２％硼酸溶液吸收，以这种形式损失的有机氮，红砂土多于黄筋泥
The changes of nitrate nitrogen, nitrite nitrogen, ammonium nitrogen and ammonia nitrogen produced by soil samples with different ryegrass growing time were studied. The effects of organic nitrogen on the growth of two red soils Mud) in the mineralization dynamics. The result of mineralization of organic nitrogen in red soil is mainly the formation of ammonium and the volatilization of ammonia. The release of ammonium obviously occurs 5 days after culture, the release of ammonium reaches the maximum in red sandy soil 15 ~ 20 days after culture, It is 30 ~ 35d after cultivation. In the first 20 days of culture, the release of ammonium in red sand was more than that of yellow gluten, but after 30 days, the situation was reversed. During the cultivation period, the ammonia released by organic nitrogen mineralization is absorbed by 2% boric acid solution, organic nitrogen lost in this form is more than red clay