黑荆(Acacia mearnsii)又名澳州金合欢,原产澳大利亚,系含羞草科,金合欢属的常绿乔木,为世界著名的速生、优质、丰产的特用经济、用材树种。发展黑荆树种植对繁荣山区经济,提高林地产值有着积极的意义。一、用途及国内外发展动态黑荆树皮是生产优质栲胶的原料。据测定其干树皮含单宁40％,高的可达50％,纯度为82％。栲胶产品色泽浅淡,溶解度高,渗透快,沉淀少,鞣透性好,是当今世界公认的最好的鞣料树种。目前我国进口的优质凝缩类栲胶都是用黑荆树皮制成的。栲胶除用于鞣制皮革外,在工业上还用于制作供建筑用的胶合板,刨花板和其它材料的胶合剂,锅炉水理处,工业防腐,矿石浮选,石油钻探,色素提取与纤维染色等;农业上可用于 Acacia mearnsii (Acacia mearnsii), also known as Australian Acacia, native to Australia, Department of Mimosa, Acacia evergreen trees, the world-renowned fast-growing, high-quality, high yield special economic, timber species. The development of black wattle planting has a positive meaning for prosperous mountain economy and increasing forestland output value. First, the use and development at home and abroad Black bark is the production of high quality plastic material. According to the determination of its dry bark with tannin 40%, up to 50% high purity of 82%. Tannin products light color, high solubility, rapid infiltration, less precipitation, good tannin, is recognized in the world today the best tannin tree species. At present, China’s imports of high-quality condensate gel are made with black bark. In addition to tanning leather, tangerine gum is also used industrially for the manufacture of plywood, particle board and other materials for building construction, boiler water management, industrial preservation, ore flotation, oil drilling, pigment extraction and fiber dyeing Etc .; Agriculture is available