为了揭示翠菊根系生长‘异常’的问题，本实验用水培的方法，对翠菊根系进行氮素(硝态氮和铵态氮)的脉冲和稳定两种处理方式，测定翠菊根构型的相关参数(根总长度、根总表面积、根平均直径和1级根平均长度)和生物量，并提出了以下3个假设：1）营养脉冲处理抑制了植株的生长，使其根系生物量以及总生物量较之稳定处理的植株的根系生物量以及总生物量显著下降。2）营养脉冲处理对翠菊根构型产生影响，使其特征数值与稳定处理的翠菊根构型特征数值之间存在显著的差异。3）根构型的相关参数与根生物量之间存在相关关系。通过方差分析，多重比较和回归分析，实验得到以下结果：1）当营养脉冲不影响翠菊的根冠比时，脉冲处理抑制了翠菊的生长，使其根生物量和总生物量下降；当营养脉冲影响翠菊的根冠比时，由于根冠比的影响，营养脉冲对翠菊生物量的影响表现复杂，其对根生物量和总生物量的影响可能被抵消。2）营养脉冲处理对翠菊根构型产生影响，使其部分参数与稳定处理的翠菊根构型参数之间存在显著的差异，但营养脉冲处理并不会对翠菊根构型的全部参数产生影响。且不同形态氮素处理也能导致营养脉冲处理影响的根构型的参数的不同。3）受营养脉冲处理影响的根构型的相关参数与根生物量之间可以找到拟合较好的回归曲线，两者之间存在至少近乎显著的相关关系；根构型的变化导致了根生物量的变化。

In order to reveal the “abnormal” growth of Cellistephus chinensis, pulse and stable processing of nitrogen (NH4+/NO3—) were used in water culture method. Root architecture and biomass were measure to verify the hypothesis followed: 1) the pulse processing of nitrogen inhibited the growth of Cellistephus chinensis, and made a significant result of lower total biomass and root biomass than the stable processing; 2) the pulse processing of nitrogen changed the root architecture of Cellistephus chinensis, and made it show a significant difference from the root architecture under stable processing; 3) there would be a correlation between root architecture and root biomass. Variance analysis, multiple comparisons and regression analysis were used to process the data and the results shows following conclusion: 1) when the root - shoot ratio was not impacted by the pulse processing, the pulse processing of nitrogen inhibited the growth of Cellistephus chinensis, and made a significant result of lower total biomass and root biomass than the stable processing, otherwise, the inhibition affect of pulse processing might be relieved; 2) the pulse processing of nitrogen only changed some aspects of the root architecture of Cellistephus chinensis, and made them show a significant difference from the root architecture under stable processing, moreover, different kind of nitrogen changed different aspects of root architecture; 3) well fitted regression equations were found between aspects of root architecture and root biomass, and the correlations between them were nearly significant at least.