中文摘要：

新鲜干润均腐土采用室内培养的方法，在同一肥土比条件下，分析不同氮源对硝化作用过程中pH和Nmin的影响，并分别建立了NH4＋-N和NO3^--N的硝化动力方程。试验结果和模拟结果均表明，①NH^＋-N消耗速率和NO3^--N增加速均呈抛物线状变化。NH^＋-N消耗速率高于NO3^--N的增加速率。NH^＋-N消耗起始速率高于NO3^--N的增加起始速率。②NH4CI的起始NH^＋-N消耗和NO3^--N增加速率在较长时间内（一周）维持在一个低水平，随后升至与（NH4）2S04相当。CI一能够抑制NH^＋-N的转化。③钙积干润均腐土NO3^--N增加最大速率[5．8～8．8mg《kg·d）]接近于一固定值与肥料种类无关。NH4^＋-N的消耗最大速率[7．8～23．5mg《kg·d）]变幅较大与肥料的性质和土壤生物性质有关。

英文摘要：

Fresh Cal-Ustic Isohumasols is used for indoor fostering in this experiment. In the same fatty soil condition, study is made on the influence of different kinds of nitrogen fertilizer to the nitrification of pH and Nmin. And kinetic model of nitrification is established. The results of the experiment and imitation show that：① The velocity of the loss of ammonium nitrogen and the accumulation of nitric nitrogen is like a parabolic flight. The rate of the ammonium nitrogen loss is higher than the accumulation of nitric nitrogen. The original rate of the ammonium nitrogen loss is also higher than the accumulation of nitric nitrogen. ② The loss of ammonium nitrogen and the accumulation of nitric nitrogen of the ammonium chloride remain in a low rate of in the first stage （about one week）. They rise as high as the rate of ammonium sulfate after the first stage. The chloride can restrain the loss of ammonium nitrogen. ③ The constant volume of maximal rate of the nitric nitrogen accumulation[5.8-8.8 mg/（kg·d）] has nothing to do with the type of fertilizer, while the constant maximal rate of the loss of ammonium nitrogen is possibly affected by the fertilizer＇s characters and the soil＇s bio-characters.