Allelopathic effects of Panax notoginseng on corn and wheat and their difference
[Objective]The plants which were suitable for crop rotation with P.notoginseng of Wenshan,Yunnan province were screened to provide theoretical basis for establishing efficient model of crop rotation system.[Method]By using the bioassay method,the allelopathic effects of P.notoginseng on maize and wheat was studied under different proportion of fibrous root decomposed liquid and different additive amount of fibrous root powder.Then,the differences in sensitivity of allelopathic effect between maize and wheat were compared and analysed.[Result]P.notoginseng fibrous root at low proportion(1∶100) and additive amount(2％) had inhibitory or acceerative impact on allelopathic effects on receptor plants.And P.notoginseng fibrous root at high proportion (1∶10-1∶1) and additive amount (4％-16％) had inhibitory impact on allelopathic effects on receptor plants.Furthermore,compared with seeds at germination stage,the seedlings at growth stages was more likely to be affected by allelochemicals,especially seedling height.In addition,the sensitive index of allelopathic effect of P.notoginseng on maize (MSI3=-0.0211) was lower than that on wheat (MSI3=-0.0211).[Conclusion]The allelopathic effects of P.notoginseng on different receptor plants are different under different proportion of fibrous root decomposed liquid and different additive amount of fibrous root powder.Therefore maize is more suitable for crop rotation than wheat becauese maize has weaker sensitivity of allelopathic effects.
国家科技期刊平台
NSTL
万方数据
维普
