不同生育期同化的光合产物在人参体内的转移和分配

在人参不同生育期,采用(14)~CO_2标记整体植株的方法,测定人参同化(14)~C产物的分配比率和残留率。结果表明,展叶末期同化的光合产物60％用于建造人参营养体,为地上部各器官的生长发育提供碳源和能源;绿果期以后的同化产物是参根中干物质和有效成份构成的主要来源;施用人参复合肥料,4年生参根干重及总皂甙含量较对照提高16.1％和4.3％。

TRANSFER AND DISTRIBUTION OF THE ASSIMILATIVE PRODUCTS IN Panax ginseng AT DIFFERENT GROWING STAGE

The distribution of assimilative products, the residue rate of 14C , and the contents of available components in four years old ginseng were determined by 14C trace technique during the different growing stage.The results showed that at seminal flower stage, about 60% of assimilative products were used for nutritive purpose so as to supply the carbon and energy sources to the upper ground organs.The assimilatve products produced after the green fruit stage are the main source of the dry matter and the available components in the root. The application of complex fertilizers to Panax ginseng increased the accumulation of the dry matter and available components in the root, and the dry weight of the root and the total saponins of Panax ginseng were raised by 16% and 4%.