Abstract: The primary studies on reducing characteristics of leaf stay-green based on leaf area after flowering in maize ZHAO Yan-ming ZHANG Hai-yan (College of Agriculture and Plant Safeguard, Qingdao Agricultural University, Qingdao, 266109, China) Abstract: Excel worksheet and Origin 7.0 statistical analysis software were applied to analyze the reducing characteristics of leaf stay-green based on leaf area after flowering in maize.The results indicated that the reducing characteristics of leaf stay-green after flowering in maize were fit the equation: y=aeb-cx/(1+eb-cx). There were significant differences among the day that plant began to senescence（Ts）、the maximum reducing rate of leaf stay-green(Vmax)、the time of the maximun reducing rate(TVmax) in different maize genotypes. The reducing characteristics of the same genotype were also different under different environments. Dynamic changes of leaf stay-green were thoroughly indicated by the equation y=aeb-cx/(1+eb-cx).