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引言在我国丰富的植物资源中,已知含单宁的植物有170多种,单宁含量较高的约为70余种,然而迄今用于栲胶生产的只有十余种。我省投入栲胶生产的植物资源有橡碗、槲树皮、红根皮、花香果四种。其中居首位的是橡碗,次为槲皮,其余两种产量甚微。不难看出,我省栲胶植物资源结构上不只品种少,尤其缺乏凝缩类单宁品种。就以橡碗而言,随着森林资源的屡遭破坏,林况逐渐恶化,再任其发展下去,终有一天会置栲胶工业于“无米之炊”的苦境!就世界范围来看,早在六十年代初,世界主要栲胶品种的产量都在逐年下降。究其
INTRODUCTION Among the abundant plant resources in China, there are over 170 known plants with tannin and about 70 species with high tannin content. However, there are only about 10 kinds of so far used for the production of gums. The province invested in the production of plastic tannin plant resources are rubber bowls, tree bark, red root bark, floral fruit four. Among them, the top is the rubber bowl, the second is the quercetin, and the remaining two produce very little. It is not difficult to see that in our province, there is not only a small number of species of plant resources, especially the lack of condensed tannin varieties. As for the rubber bowls, with the repeated destruction of forest resources, the deterioration of the forest condition and the further development of the rubber plantation will one day endure the bitterness of the plastic industry in making rice without straw. As far as the world is concerned, At the beginning of the decade, the output of the major varieties of gum in the world is declining year by year. Study it