The Response of SOC Content and Seasonal Dynamics of Three Alnus formosana Forests under Different Herb Layer to the Fertilization

摘要: Alnus formosana + Hemarthria compressa (A+H), Lolium multiflorum Lam (A+L), and natural grass (A+N), the comparative analysis of SOC(SOC) content, vertical distribution seasonal dynamics three kinds forest modes response which to fertilization suggests that content SOC lands under different herb layer in soil has been fertilized unfertilized respectively are: A+L >A+H >A+N. The results mainly caused by differences among layers. law organic carbon is no difference would be decreased with depth However, reduction rate layers 0~20cm more obvious than 20~40cm. Fertilization can increase especially shallow surface. are basically same: will reach minimum autumn, then it gradually increased until maximum reached next summer. main characteristic relatively higher presented spring summer, on contrary autumn winter. insignificantly influenced fertilization. For better A+H.