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Bulletin of Botanical Research ›› 2018, Vol. 38 ›› Issue (4): 568-574.doi: 10.7525/j.issn.1673-5102.2018.04.011

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Allelopathic Effects of Leaves Extracts on Growth of Three Fast-growing Tree Species on Ardisia gigantifolia Staf Seedlings

ZHOU Ze-Jian1,2, LIU Ni-Ni1, WU Bing-Qian1, ZHANG Hong1, ZHAO Heng1   

  1. 1. College of Life and Environmental Sciences, Minzu University of China, Beijing 100081;
    2. Guangxi Ecological Engineering Professional Technology Institute, Liuzhou 545004
  • Received:2018-01-07 Online:2018-07-15 Published:2018-07-21
  • Supported by:
    The Fundamental Research Fund for the Central Universities from Minzu University of China(YDZXXK201618);The Science and Technology Projects of the Guangxi Education Department(2017KY1147)

Abstract: It is the key to understand scientifically the compound planting of forest medicine that whether there is gain effect between afforestation tree species and medicinal materials, among which, avoiding of allelopathic inhibition is one important aspect. Allelopathic effects of three fast-growing tree species on Ardisia gigantifolia Stapf were evaluated to discuss if A.gigantifolia was mixed with Eucalyptus urophylla S.T.Blakely, Pinus elliottii or Cunninghamia lanceolata(Lamb.) Hook. Comparing with CK, the plant height of A.giantifolia was significantly lower under the treatments of 40, 60 and 80 g·L-1(P<0.05), and the root length, dry weight underground and biomass were also strongly inhibited under all the treatments(P<0.01); With the increase of the extract concentration, the inhibition of E.urophylla was enhanced. The aqueous extraction of P.elliottii had a positive stimulatory effect on height, root length and dry aboveground weight of A.gigantifolia under treatment of the 20 and 40 g·L-1, while the higher concentration had weak or negative effect. Besides, P.elliottii had a stimulatory effect on basal diameter, biomass and dry underground weight of A.gigantifolia under treatment of the lowest content, while the highest content had an inhibitory effect. For C.lanceolata the lowest content had a stimulatory effect, while the highest concentration showed significant inhibition. Taking all parameters into account, Eucalyptus could not be mixed with A.giantifolia, while P.elliottii or C.lanceolata may be an alternative intercropping plant species for A.giantifolia, because the growth of A.giantifolia was inhibited significantly by the allelochemicals released from the decomposing leaf litter of Eucalyptus, and the growth of A.giantifolia was stimulated under the lowest content of aqueous extraction from P.elliottii and C.lanceolata.

Key words: Ardisia giantifolia Staf, Cunninghamia lanceolata(Lamb.), Pinus elliottii, Eucalyptus, allelopathy, intercropping

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