黑荆树(Acacia decurrens var.mollis Linel.)原产南非和澳洲,是主要的鞣料植物树种,我所一九六一年引种的黑荆树,其树皮含单宁48.82%,纯度81.90%,单宁主要部分属凝缩类,是我所测定98种鞣料植物中单宁含量最高的树种,为厚皮香的1.6倍,余甘子的2倍,旱冬瓜的2.3倍,圣诞树的1.9倍,麻栎的4.7倍。也是纸浆和人造纤维丝的最好原料。据福建省资料,用作纸浆,收获率高,质量也好,并且容易漂白;每百斤木 Acacia decurrens var. Mollis Linel. Native to South Africa and Australia, is the main tannin plant species, I introduced in 1961 black wattle, the bark contains 48.82% tannin, purity 81.90 %, The main part of the tannin is condensed, is the highest content of tannin in the 98 kinds of tanning plants I measured, 1.6 times as thick leather incense, 2 times more than emblica, 2.3 times of winter melon, Christmas tree 1.9 times, 4.7 times the oak. It is also the best raw material for pulp and rayon. According to Fujian Province, for pulp, high yield, good quality, and easy to bleach; per kilogram of wood