Study on the Effect of Fertilization on the Growth of P.×euramericana in Reclaimed Area by Coal Ash

Study on the effect of fertilization on the growth of juvenile plantation of P.×euramericana in reclaimed area by coal ash was conducted. The results show:(1)Both the effect of applying N、P、K and green manure are significant,comparatively speaking,the effect of application of N and green manure is better than that of applying P、K,the reason why the effect of fertilization is good is that the nutritional elements in this kind of soil is very poor. (2)If the fertilization continued in 4 successive years,the best effect appeared in the current year of cultivation. If a comparison was made with control,in the 15 treatments,the tree height and DBH of the plantation in the 4th year were higher than those of the control by 47.7%～71.7% and 37.3%～71.7% respectively,which showed the effect of fertilization was significant.(3)The best scheme for fertilization is N(150 g/tree)+P(32.775 g/tree)+K(62.25 g/tree)+green manure(20 kg/tree).