To study the influence of soil nutrient level on plasticity of floral characteristics in Iris japonica Thunb.,The experiment was carried out under high,medium,low levels of N,P,K.

• 为了研究土壤养分对蝴蝶花的花形态可塑性的影响,在田间实验中对蝴蝶花进行了高、中、低养分(N、P、K)水平处理。