Effect of N,P and K on the growth of Cunninghamia lanceolata Seedlings

Investigations were made on the effect of N,P,K fertilizers on the seedling growth in the Cunninghamia lanceolata seedling stage. The result showed that the fertilization could significantly promote the ground diameter and height of Cunninghamia lanceolata seedlings,but it was needed to combine N,P and K fertilizers. The effect of the single application of N fertilizer was poor as compared with the combined application of N,P and K fertilizers. Different fertilization treatmerts had significant differences. The effect of different treatments also reached a very significant difference in Cunninghamia lanceolata seedling ground diameter and seedling height growth. The formula of the most reasonable fertilizers was N 1.5 g, P 5 g, K 1.5 g. The seedling height was higher by 38.8%, the diameter was higher by 46% than the control, thus able to be popularized in the production. The formula of the fertilization N 1.5 g was the worst,its seedling height was higher by 17.4% and the diameter was higher by 20% than the control.