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利用通用旋转组合设计方法,建立了氮、磷、钾与巨桉木材纤维素含量之间的效应模型.合理施用氮或钾可以提高木材纤维素含量,施用磷无助于木材纤维素含量的提高.氮、磷之间具有协同效应,以中量的磷和中量的氮搭配施用为好;高钾低氮或者高氮低钾有助于木材纤维素含量的增加;考虑氮、磷、钾的综合效应,宜选择中等水平的磷和高水平的钾搭配.因素取95%的置信区间既丰产又优质的最佳综合农艺措施为:氮56g/N,磷47～51g/N,钾42～46g/N.
The effect model of nitrogen, phosphorus, potassium and cellulose content in Eucalyptus grandis wood was established by the universal rotary combination design method.The rational application of nitrogen or potassium could increase the cellulose content of wood, and the application of phosphorus did not help to improve the content of wood cellulose .Nitrogen and phosphorus have a synergistic effect, with the amount of phosphorus and the amount of nitrogen collocated with the application as good; high potassium and low nitrogen or low potassium can contribute to the increase of wood cellulose content; consider the nitrogen, phosphorus and potassium Of the combined effects, should choose a moderate level of phosphorus and high levels of potassium with factors to take 95% confidence interval yield and yield both the best comprehensive agronomic measures: nitrogen 56g / N, phosphorus 47 ~ 51g / N, potassium 42 ~ 46g / N.