隆缘桉(Eucalytus exserta)原产澳洲。自引种以来,在我国南部低丘陵和沿海台地生长良好,表现为耐瘠簿和前期速生等。但由于造林用种良劣不分,因此,出现了造林后期生长衰退快和林分分化大等问题。为了改良它的种性,我区于1975年在全区隆缘桉人工林内,采用五株优势木对比法 Eucalyptus Eucalyptus origin (Eucalytus exserta) Australia. Since its introduction, it has been well-developed in the low hills and coastal platforms in the south of China, showing anti-barren books and premature births. However, due to the good use of afforestation species, therefore, there has been rapid decline in reforestation and stand differentiation and other issues. In order to improve its species, my district in 1975 in the whole area of ​​eucalyptus urophylla plantation, the use of five dominant wood contrast method