Effects of Aqueous Extracts from Alternanthera philoxeroides Griseb on Seed Germination of Five Vegetable Seeds

[Objective] The allelopathy mechanism of A. philoxeroides was understood to provide theoretical basis for control and management of A. philoxeroides. [Method]Effects of aqueous extracts from A. philoxeroides on seed germination of five vegetable seeds were studied. [Result] The aqueous extracts had no effects on the seed germination of Luoboyacai,Yidianhongxiancai and Yidianhongluobo,but had significant effects on those of Wuyueman and Yidalilshengcai; meanwhile,no matter aboveground or underground aqueous extracts from A. philoxeroides,the germination rates of five vegetable seeds in sequence from high to low were Yidianhongluobo,Wuyueman,Yidianhongxiancai,Yidalishengcai and Luoboyacai. Besides,the allelopathy effects of A. philoxeroides on the bud length and root length of five vegetable seeds had significant interspecific differences. [Conclusion] The allolepathy of A. philoxeroides was negative,but there were vastly differences between species and parameters about the affecting style and extent of aboveground and underground leaching solutions. Therefore,at the areas where the invasion of A. philoxeroides is extensive and so is difficult to be wiped off,Yidianhongluobo is the better selection compared to other seeds.