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Growth and competition among understory plants varies with reclamation soil and fertilization

Ecological Processes 2018年第1期7卷 116-123页

作者： Jennifer Buss kyle stratechuk Bradley D.Pinno Department of Renewable Resources University of AlbertaEdmontonAlbertaCanada

Introduction:Following oil sands mining in Alberta,Canada,the main land management goal is to establish a functioning boreal forest ecosystem,including the understory plant *** of the challenges with restoring the understory is the presence of non-native species that compete with desirable native species for *** a greenhouse experiment,we studied the growth of two native understory species(Galium boreale and Vicia americana)and a non-native invasive species(Matricaria perforata)grown with either intra-or interspecific neighbors across three common land reclamation soils and a nitrogen fertilizer ***:When grown by itself,*** aboveground biomass did not differ among soil or fertilizer treatments,likely due to its ability to fix *** of *** was directly related to soil nitrogen,and it had the greatest increase in biomass with *** and biomass of *** was less than the other species,and it had the highest mortality in the nitrogen-poor *** grown together,the proportional biomass of *** and *** varied with soil treatment such that *** was dominant in the high-nitrogen forest floormineral mix treatment while *** was dominant in the low-nitrogen peat-mineral ***:Operationally,care should be taken when applying fertilizer to reclamation areas,as it may have an unwanted positive effect on growth for undesirable non-native plants at the expense of native *** terms of seed mixtures,*** may be a good option for low inorganic nitrogen resource soils and *** for high nitrogen resource soils.

关键词： Matricaria perforata Galium boreale Vicia americana Forest floor-mineral mix Peat-mineral mix Oil sands reclamation

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