Abstract:

The field experiment studies the effects of Dicyandiamide on the of Ammonium-N and Nitrate-N transformation in the soil of potato in each growth stage. The experimenting potato was middle and late variety“KexinⅠ”;the seed manure were:(NH4)2SO4+Ca(H2PO4)2+DCD, (NH4)2SO4 +Ca(H2PO4)2, Ca(NO3)2+Ca(H2PO4)2,Ca(H2PO4)2.The result shows that the content of Ammonium-N increased While that of nitrate-N decreased significantly（p＜0.05） when applying Dicyandiamide.