Allelopathic Effects of Two Invasive Plants Litter on Torenia fournieri
《北方园艺》[ISSN:1001-0009/CN:23-1247/S]
- Issue:
- 2018年20
- Page:
- 76-83
- Research Field:
- Publishing date:
Info
- Title:
- Allelopathic Effects of Two Invasive Plants Litter on Torenia fournieri
- Author(s):
- QUAN Guoming1; 2; JIN Chunlian1; ZHANG Jia′en2; DAI Seping3
- (1.Department of Urban Construction Engineering,Guangzhou City Polytechnic,Guangzhou,Guangdong 510405；2.Institute of Tropical and Subtropical Ecology,South China Agricultural University/Key Laboratory of Agro-Environment in the Tropics,Ministry of Agriculture/Guangdong Provincial Engineering Technology Research Center for Modern Eco-agriculture and Circular Agriculture,Guangzhou,Guangdong 510642；3.Guangzhou Institute of Forestry and Landscape Architecture,Guangzhou,Guangdong 510405)
- Keywords:
- bioinvasion; Praxelis clematidea; Bidens pilosa; litter; allelopathy
- PACS:
- -
- DOI:
- 10.11937/bfyy.20180406
- Abstract:
- In order to explore allelopathic effects of Praxelis clematidea litter and Bidens pilosa litter in the invaded greenbelt soil,the effects of their litter decomposition on the growth of Torenia fournieri were examined by a greenhouse pot experiment.Three litter concentration levels of each weed were set as L10 (10 g·pot-1),L20 (20 g·pot-1) and L40 (40 g·pot-1),and no litter was added as control.The results showed that with the treatments of litter decomposition of the two exotic invasive weeds,the plant height,branching capacity,total leaf area and biomass of T.fournieri were declined dramatically,especially the inhibition effects on branch number,leaf area and flowerlet number.The allelopathic inhibition effects were generally enhanced with the increasing litter concentrations,and the allelopathic compound effect of P.clematidea was higher than that of B.pilosa.Leaf area ratio (LAR),leaf area to root mass ratio (LARM),specific leaf area (SLA) and relative growth rate (RGR) of T.fournieri were also significantly decreased,especially under P.clematidea litter treatments；moreover,the biomass allocation strategy of T.fournieri was changed by P.clematidea treatments,its root mass fraction (RMF) was increased obviously while its stem mass fraction (SMF) was decreased significantly.Compared with the underground root system,the allelopathic effects of litter decomposition of the two exotic invasive weeds on the growth of stem and leaf organs of T.fournieri were stronger,and the inhibition in their biomass accumulation was even higher.
Last Update: 2018-11-13