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Acta Prataculturae Sinica ›› 2020, Vol. 29 ›› Issue (9): 169-178.DOI: 10.11686/cyxb2019533

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A study of the allelopathic effect of extracts from different parts of Iva xanthiifolia on five native species

LI Feng-lan1, WU Jia-wen1, YAO Shu-kuan2, ZHAO Zi-yi1, ZHAO Xiao-can1, HE Fu-meng1, ZHU Yuan-fang1, SHI Qi-hai1, ZHOU Lei1, XU Yong-qing1,*   

  1. 1. College of Life Science, Northeast Agricultural University, Harbin 150030, China;
    2. Agricultural and Rural Bureau of Tangyuan County, Jiamusi 154700, China
  • Received:2019-12-04 Revised:2020-02-13 Online:2020-09-20 Published:2020-09-20

Abstract: This research explored the allelopathic effects of extracts of the exotic plant Iva xanthiifolia on seed germination and seedling growth of native plants. Seeds of five native plant species were treated with water extracts of the plant. The extracts from different parts of I. xanthiifolia had different allelopathic effects, with the suppression effect of leaf extract being the strongest. Among the acid, alkaline and neutral components isolated from leaves, the allelopathic effect of the neutral group was stronger than that of the acid and alkaline components. The sensitivity of different native plants treated with the same extract of I. xanthiifolia was also different. The seed germination and seedling growth of Setaria viridis and Amaranthus tricolor were sensitive to the extracts from different parts of I. xanthiifolia. Low concentration of the extract promoted the growth of Artemisia sieversiana, Echinochloa crusgalli and Chenopodium album, while a high concentration of the extract inhibited the growth of the same three species.

Key words: allelopathy, seed germination, seedling growth, low promotes high suppression