不同产地杜仲果实形态特征及含胶量的差异性研究

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:不同产地果实含胶率存在极显著差异.杜仲果实含胶率的变化与所处的环境密切相关.杜仲果实含胶率大体上随着纬度的增加而呈逐步减小的趋势,南方产区果实含胶率一般比北方产区高.纬度越高,年日照时数越长,土壤pH值越高,越不利于果实内杜仲胶的形成,果实含胶率越低;年均降雨量越大,则果实含胶率越高.

Difference of Samara's Form Characters and Gutta-Percha Content from Different Producing Areas Associated with Eucommia ulmoides

For making clear the geographic variance of gutta-percha content in Eucommia ulmoides samara so as to provide scientific guide for developing high yield gutta-percha industrialization base, studies were carried out on 16 producing areas from the main planting areas and introduction areas. Typical sample-tree selection and random selection were applied in this study. Integrated extraction was applied for the gutta-percha content rate test. The results showed that outstanding difference of gum content existed among samaras from different producing areas. The change of gum content in samara had a close relationship with its habitat. On the whole, gum content decreased gradually along with the latitudinal increase. Higher latitude, more sunlight hours and higher pH value made against the formation of gutta-percha in seed that resulted in lower gum content. On the other hand, higher gutta-percha content was observed from the area where there were higher precipitations.