Abstract: Through dynamic monitoring of Horqin sandy land of white and red Helianthus tuberosus L. each organ biomass yield, this paper explored material accumulation rate and material allocation law in Horqin sandy land of Helianthus tuberosus L.，so as to provide basis for the development and utilization of Helianthus tuberosus L.. The results showed that  the stem/leaf ratio of white Helianthus tuberosus L. showed a chanfing trend of first increased then decreased, while the  stem/leaf ratio of red Helianthus tuberosus L. was gradually increasing. During the whole growth and development  period, the stem/leaf ratio of red Helianthus tuberosus L. was high than that of the white one, while, the root shoot ratio of  white Helianthus tuberosus L. was greater than that of the red one. There was no significant difference between the leaf mass ratio，flower mass ratio and tuber mass ratio of these 2 varieties，under the same sampling time. In different organs, the substance accumulate rates were not the same. Among all organs, the tuber showed the changing tendency of first increase then decreas in September. Except flower organ， there were also significant differences in substance allocation rates of the same organs between these 2 different Helianthus tuberosus L. varieties.

Key words: Helianthus tuberosus L., biomass, material accumulation rate, correlation

摘要： 为探讨科尔沁沙地菊芋物质积累速率和物质分配规律，通过对科尔沁沙地白皮和红皮菊芋各器官生物产量的动态监测，以期为菊芋开发利用提供依据。结果表明:白皮菊芋茎叶比呈先升高后降低的变化趋势，红皮菊芋茎叶比逐渐升高，整个生育时期红皮菊芋茎叶比均高于白皮菊芋，而根冠比白皮菊芋大于红皮；相同取样时间下，两品种菊芋叶比重、花比重和块茎比重之间均没有显著差异；物质在不同器官中积累速率并不相同，其中块茎在9月份出现后呈先升高后降低的变化趋势；除器官花外，两品种菊芋相同器官中物质分配速率也有显著差异。

关键词: 菊芋, 生物量, 物质积累速率, 相关性