【摘要】 菊芋(Helianthus tuberosus)块茎作为生物乙醇和菊粉产业的主要原材料,研究提高菊芋块茎生物产量和品质成为学者们关注的热点问题。通过营养期对菊芋进行断根处理,探讨生长速率和各器官物质积累速率对断根的响应情况,以期为菊芋块茎高产栽培提供理论依据。结果表明:断根有效地提高了块茎膨胀高峰期(9月21日至10月20日)的物质积累速率,能够有效地提高块茎产量;叶片、茎秆和花的物质积累速率随着断根时间的延长呈现先增加后降低的变化趋势,其中叶片物质积累速率的升高,也是断根提高菊芋块茎产量的主要原因;重度断根处理(20cm)条件下菊芋生长速率呈现先增加后降低的变化趋势,其它各断根处理对菊芋生长速率没有显著改变。更多还原

【Abstract】 As the main raw material for bio-ethanol and inulin industry,how to raise the tuber biological yield and quality become the focus of Helianthus tuberosus research.H.tuberosus strain‘Red Skin’was used as material and the effect of root cutting on the growth rate and matter accumulation rate under field condition by root cutting treatment in vegetative growth stage were studied and five root cutting radius(0,20,40,60,80cm)were treated.The results showed that,the matter accumulation rate was improved by root cutting,and led to the tuber yield increased;it indicated first increasing and then decreasing for matter accumulation of leaf,stem and flower.And leaf matter accumulation rate was improved,which was the main reason for improving tuber yield by root cutting.Growth rate indicated first increased and then decreased under root cutting 20 cm conditions,and there was no significant effect for growth rate of other treatments and control.更多还原