摘要
采用四因素五水平二次通用旋转组合设计方法,建立了造林密度、氮、磷、钾肥与巨桉纸浆原料林木材化学成分综合分之间的效应模型并对模型进行了主效应分析。造林密度、氮、磷、钾肥对巨桉木材化学综合分的影响程度依次为:造林密度>磷肥>氮肥>钾肥。除钾肥对木材的化学综合分影响不大外,造林密度、氮、磷肥都能对木材化学综合分产生促进作用,作用的大小与其他培育措施恰当配合紧密相关。造林密度的最大效应值在密度166株/667m2,分别施氮、磷、钾肥50g/株时;磷肥最大效应值在施磷肥32.5g/株,造林密度152株/667m2、分别施氮、钾肥75g/株时;氮肥最大效应值在施氮肥55g/株,造林密度138株/667m2、分别施磷、钾肥50g/株时。
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?m^2. The best effect of P is achieved, when the density is 152?N/667?m^2 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?m^2 and the application of P and K is 50?g/N respectively with the application of 55?g nitrogenous fertilizer per individual N.
出处
《四川农业大学学报》
CSCD
2005年第1期52-57,共6页
Journal of Sichuan Agricultural University
基金
四川省教育厅重点项目。
