论文部分内容阅读
湿地松(Pinus elliottii Engelm.)是我国目前引种发展的优良速生树种之一。本研究就湿地松树皮提制栲胶作了一些探索性工作。一、原料为了摸清湿地松树皮的单宁含量,我们对不同地区、不同采集季节、不同树龄和树
Pinus elliottii Engelm. Is one of the finest growing species introduced and developed in our country. This study made some exploratory work on the extraction of gum from the pine bark. First, raw materials In order to find out the tannin content of the pine bark, we different regions, different collection seasons, different ages and trees