摘要
为了弄清杜仲树皮含胶特性的地理变异规律 ,为杜仲高产胶产业化基地的选择提供科学依据 ,选择我国主要杜仲产地和主要引种区共 16个产地作为研究对象。采用选择典型样株和随机取样的方法 ;含胶率的测定采用杜仲胶综合提取法 ;利用SAS软件进行统计分析。结果表明 ,不同产地 10a生杜仲胸径、树皮厚度和树皮含胶率均存在极显著差异。北方产区杜仲胸径和树皮厚度普遍高于南方产区 ;在纬度相似的地区 ,东部产区高于西部产区。杜仲皮的含胶率大体上随着纬度的增加而呈逐步减小趋势 ,南方产区杜仲皮的含胶率一般比北方产区高。海拔越高、年降雨量越大、年均气温越高、无霜期越长 ,越有利于杜仲皮内杜仲胶的形成和积累 ,树皮含胶率越高。
For making clear the geographic variations of gutta percha content in bark of Eucommia ulmoides so as to provide scientific guide for developing high yield gutta percha industrialization base, studies were carried out in 16 producing areas from both the main planting areas and introduction areas. Typical sample tree selection and random selection were applied and integrated extraction was used for the 10_year_old gutta percha content test in this study. The results showed that there were significant differences in DBH (diameter at breast height), barks thickness and gutta percha content among samples from different producing areas. On the whole, gum content decreased gradually along with the latitudinal increase. In the areas with similar latitude, gum content was higher in eastern areas than that in western areas. Higher latitude, more precipitations, higher average annual temperatures and longer frost free period favored the formation and accumulation of gutta percha in bark, which resulted in higher gum content.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2004年第5期186-190,共5页
Scientia Silvae Sinicae
基金
国家高技术项目"杜仲良种快繁及高产栽培技术研究"(99-15 )的部分研究内容。
关键词
产地
杜仲皮
含胶特性
变异规律
杜仲胶
Bark of Eucommia ulmoides , Gutta percha, Producing area, Variation dynamic
