Allelopathy Effect of Sunflower Water Extracts on Germination and Growth of Portulaca oleracea L. Seeds

[Objective] The aim was to understand allelopathy effect of sunflower water extracts on germination and growth of P. oleracea seeds. [Method]The germination potential,germination rate,shoot length,root length and allelopathic effect index were as measurement indexes,allelopathy effect of sunflower water extracts on germination and growth of P. oleracea seeds was studied. [Result] Different parts of sunflower on germination and seedling growth of P. oleracea seeds had allelopathy,and the allelopathy was inhibition,and the inhibition of different parts was in order of stem flower leaf root. The inhibitory effects of different parts of sunflower on germination and seedling growth of P. oleracea seeds increased with the increase of concentration. [Conclusion]The research result provides theoretical basis for integrated pest control in agriculture and production.