Table 1

Coding of independent variable level"

Table 2

Fertilizer recipes of different treatments"

Fig.1

Height growth (a) and mean monthly height increment(b) of different fertilizer treatment of E.urophylla young trees The best treatment, The better treatment, The worst treatment, Control(CK) . "

Table 3

Test result of E.urophylla young trees applied N, P, K, B fertilizers"

Table 4

Variance analysis of tree height model"

Table 5

Frequency distribution of tree height limits"

Table 6

Xi frequency distribution of high project"

Table 7

Xi confidence limits of high project"

Table 8

Frequency distribution of tree height limits of high project"

Table 9

Xi frequency distribution of middle project"

Table 10

Xi confidence limits of middle project"

Table 11

Frequency distribution of tree height limits of middle project"

Fig.2

Curve of single factor effect ——X1, ——X2, ——X3, ---X4 "

Fig.3

N and B mutual effect curved surface chart of E.urophylla"

Fig.4

P and K mutual effect curved surface chart of E.urophylla"

Fig.5

K and B mutual effect curved surface chartof E.urophylla"

Table 12

Parabolic regression equation relation of foliar nutrient concentration and its specific value and tree height(Y) of E.urophylla young trees"

Table 13

Foliar nutrient concentration and its specific value of E.urophylla young trees"