Abstract:A field experiment was carried out to investigate the effects of different nitrogen(N)-form proportions of NH+4-N to NO-3-N on the growth of Schisandra chinensis seedlings. The soluble protein content, chlorophyll concentration in leaves, whole nitrogen content, and the seasonal regulation of biomass accumulation and distribution in roots, stems and leaves were analyzed on 2-year-old S.chinensis seedlings. The results showed that the absorbance and assimilation of different nitrogen(N) form in each growth stage of S.chinensis seedlings were significantly different. NH+4-N and NO-3-N had notable jointeffect: NH+4-N was beneficial for early growth stage of S.chinensis seedlings, when the proportion of NH+4-N and NO-3-N was 75∶25, above-ground biomass was the most; but NO-3-N was more useful in middle and late growth stages, when the proportion of NH+4-N and NO-3-N was 25∶75, the biomass was mostly distributed above ground.