The effects of different nitrogen forms and ration on the growth and nutrition absorption of Moso bamboo seedlings were studied by the method of sand culture.The result showed that the absorpyption and assimilation of diferent nitrogen form were significandy different.When the ratio of NO3-and NH4+ was 2m2,the Moso bamboo seedings growth condition was beet,and the biomass and nutrition absorption amounts were significantly increased.Nitrate nitrogen source was beneficial to Moso bamboo growth than ammonium nitrogen source,and could improve earlier tillering of the bamboo seedling.When ammonium nitrogen took up 75% or more in the proportion of nitrogen source,the Moso bambooseedlings growth wes inhibited and at last dead at the whole ammonium nitrogen source.Accordingly,the study indicated that Moso bamboo seedling was weak nitrate plant,which had certain reference value for bamboo forest fertilization.