黑荆树属于豆科金合欢属,是一种速生树种,7—8年即可成材,生长速度比桉树还快,是亚热带地区生长最快、经济价值最高的速生树种。原产澳大利亚昆士兰。其树皮是一种优质高产的凝缩类栲胶原料,一般含单宁达40%以上,比落叶松树皮含单宁量高4倍。两吨多树皮即可制1吨颜色浅淡、溶解性高、渗透快、沉淀少的优质栲胶。栲胶成本能大幅度降低,不但可以完全代替进口荆树和坚木栲胶,节约 Acacia is a leguminous tree, is a fast-growing tree species, 7-8 years to become a material, the growth rate faster than eucalyptus, is the fastest growing subtropical region, the highest economic value of fast-growing species. Origin of Queensland, Australia. Its bark is a kind of high-quality and high-yielding condensed gums, which generally contain more than 40% tannin and 4 times the amount of tannin in the bark of larch. More than two tons of bark can be made of 1 tonne color light, high solubility, rapid infiltration, sedimentation of the quality of small gum.栲 plastic costs can be significantly reduced, not only can completely replace the imports of Jing and Kenwood gum, saving