Abstract:

The aim was to study the allelopathic effect of aqueous extracts from rhizosphere soil of Parthenium hysterophorus on seed and seedling of vegetables. Aqueous extracts with different concentrations of rhizosphere soil of Parthenium hysterophorus were prepared to study their allelopathic effects on seed germination and seedling growth of three plant acceptors (Brassica chinensis, Beta vulgaris and Amaranthus tricolor). The results showed that the water extracts with different concentration had inhibitory effects on the rate of germination of three plants in general, but it increased the seed germination index of Beta vulgaris. The order of restraining effect from strong to weak was Amaranthus tricolor, Brassica chinensis, Beta vulgaris. Compared with contract, the root length and the seedling height changed significantly; the free proline contents were all higher than those in control and the promotion became stronger as the concentration of aqueous extract increased; while the contents of soluble sugar changed differently. The aqueous extracts from rhizosphere soil of Parthenium hysterophorus had certain allelopathic effects with different selectivity on different plants and different growth characters.