Abstract：Kerqin sandy land is a typical agro-pastoral ecotone with fragile ecological environment. Amygdalus pedunculata Pall. is an endangered tree species with advantages of wide adaptability, strong resistance to drought, sand fixation and wind erosion resistance, showing ecological and economical benefits. We adopted annularity fertilizing pattern and carried out different fertilizer proportions and fertilizer amounts on young A. pedunculata in Kerqin sandy land, analyzed the effect of growth characteristics on fertilization, and obtained the optimum fertilization proportion and amount. The results showed that during the August and September in 2012 the increasing rates of six indexes, i.e., seedling height, crown width, length of new branches, ground diameter, diameter of new branches and number of new branches of A. pedunculata, were 16.00%, 39.51%, 37.15%, 17.72%, 50.96%, and 33.05%, respectively, when the mass ratio of N, P and K in mass quality was 3.6∶2.3∶1.0 and the fertilizer amount was is 40 g per seedling. There was a significant difference in seedling height and ground diameter of A. pedunculata（R2=0.9048, R2=0.8889）between the first and the later investigation, showing the evident effect of fertilization on seedling height and ground diameter. The six indexes of A. pedunculata all reached a peak value when the mass ratio of N, P and K was 3.6∶2.3∶1.0 and the fertilizer amount was 40g per seedling.
2013, Vol. 11 
