黑荆树(Acacia decurrens)原产大洋洲,树皮含单宁达40%左右,是世界上著名的速生鞣料树种,一般栽植后7～8年便可采伐利用,每公顷可产木材一百立方米左右,材质坚韧,可供一般用材和作人造纤维及制纸原料。黑荆树根系发达,具根瘤菌,能改良 Acacia decurrens native to Oceania, the bark contains about 40% tannin, is the world’s famous fast-growing tanning species, the general planted 7-8 years after harvesting can be used per hectare produces 100 wood Cubic meters or so, the material tough, for general timber and man-made fibers and paper raw materials. Black wattle roots developed, with rhizobia, can be improved