关键词: 巨桉, 纸浆原料林, 木材化学成分, 主效应

Abstract: By using the design of quadratic common rotation including four factors, five levels, the basic models of efficiency were established between density, N, P, K and synthetic value of wood chemical components of Eucalyptus grandis pulpwood, and the quadratic regression models were simulated closely with reality by testing. The results of principal-efficiency analysis are as follows:impacting synthetic value of wood chemical components of Eucalyptus grandis pulpwood timber, the order of the four factors is as follows from the high to the low:density > P > N > K. The effect of density, N and P on synthetic value of wood chemical components is positive, but the effect of K is not significant. The best effect of planting density on synthetic value is achieved, when the application of N, P and K is 50 g/N respectively with the density of 166 N/667 m². The best effect of P is achieved, when the density is 152 N/667 m² and the application of N and K is 75 g/N respectively with the application of 32.5 g/N P. The best effect of N is achieved, when the density is 138 N/667 m² and the application of P and K is 50 g/N respectively with the application of 55 g nitrogenous fertilizer per individual N.

Key words: Eucalyptus grandis, pulpwood, wood chemical components, principal efficiency