一、引言南洋楹(Albizzia falcata(L)Backer)是世界上有名的速生树,4—5年生就可砍伐利用。在原产地胸径年生长量可达10厘米以上。在印尼好的立地条件下。4—5年生林分每公顷材积年生量高达103—108立方米,享有“植物赛跑家”的称号。在我省厦门地区胸径年生长量也可达到5厘米以上,如厦门市郊坑内11.5年生的南洋楹,树高16.75米,胸径65.3 I. INTRODUCTION The Albizzia falcata (L) Backer is a world-famous fast-growing tree that can be harvested after 4-5 years of age. DBH in the origin of annual growth of up to 10 cm above. In Indonesia, a good site conditions. 4-5 year-old stands have an annual yield of 103-108 cubic meters per hectare and enjoy the title of “Plant Runner”. In the province of Xiamen, the annual growth of breast diameter can reach more than 5 cm, such as Xiamen City Suburb pit 11.5 year-old Nanyang, height 16.75 m, diameter 65.3