一、黑荆树的经济价值: 黑荆树是热带、亚热带鞣料植物中树皮含单宁量最高的树种之一,它比常见的油柑、相思、本麻黄等树的含量高1—3倍,因此它系栲胶工业的重要原料来源。黑荆树树皮是一种速生、优质、高产的凝缩类栲胶原料,含单宁48.82%,纯度高达81.90%,每两吨干皮约可 First, the economic value of black wattle: black wattle is a tropical, sub-tropical tanning plant bark contains one of the highest amount of tannin, which is more common than kumquat, Acacia, the ephedra and other high tree content of 1- 3 times, so it is an important raw material source of the gum industry. Black Wattle bark is a fast-growing, high-quality, high-yielding condensed gums containing 48.82% tannin, purity up to 81.90%, about every two tons of dry skin