Analysis on Growth Response to Fertilization in Young Cunninghamia lanceolata Plantation

The fertilization test,including seven treatments and three replicates,wasconducted in one-year-old Cunninghamia Lanceolata plantation on yellowed acid soil.Themain results showed: fertilization had some effects on the growth of young C. Lanceolata plantation,but the effect was not remarkable.Calcium magnesium phosphate,ammoniumphosphate,and calcium superphosphate had the same efficiency for tree.The effect of fertilizerapplied in ditch was better than that applied in hole.Fertilization can affect the biomass ofdifferent parts of the tree,the biggest effect was on the leaves,the second on trunk,the thirdon branches,and the last one on roots.The application of ammonium phosphate in ditch notonly had very notable effect on the growth of the leaves but also had marked effect on the total biomass of the tree.Covariance analysis showed that the height of the tree at the begin-ning of fertilization would disturb the growth response to fertilizer,especially for the heightthe same year the fertilizer was applied.