期刊论文

中文

中南林业科技大学学报

1673-923X

2004

24

4

11-16

10.3969/j.issn.1673-923X.2004.04.003

国家高技术项目"杜仲良种快繁及高产栽培技术研究"(编号为:99—15)的部分研究内容.；

本校为第一机构

为了弄清杜仲皮含胶率的年变化、逐年变化和垂直变化的特点和规律,为杜仲皮内杜仲胶的有效利用提供科学依据,2002年,在河南省嵩县杜仲综合试验示范基地进行了杜仲皮内杜仲胶形成积累的试验.试验方法为选择典型样株法和随机取样法;杜仲皮样品采集后均进行了发汗处理;采用杜仲胶综合提取法测定含胶率.试验结果表明:杜仲树皮含胶率在一年内的变化不明显;树龄为6 a以前的树皮其含胶率随树龄的增长而提高,树龄为6 a以后的树皮其含胶率有所下降并逐步趋于稳定;同一单株杜仲树皮的含胶率和杜仲胶的密度,随其主干高度的增加总体呈上升趋势;由于杜仲皮含胶率在一年中比较稳定,因而在不同的生长季节均可以...

For a better understanding of the characteristics and regularities of the annual change, year-after-year change and vertical change of gutta-percha content in the bark associated with Eucommia ulmoides, studies were carried out in 2002 at Eucommia Integrated Demonstration and Experiment Base in Songxian County, Henan Province, in order to provide a scientific basis for effective use of gutta-percha extracted from Eucommia bark. Model sample tree selections and random tree selections were employed in the research. The bark samples were under diaphoresis treatment and a synthetic extraction was ...