Research on Interspecific Competition Relationship in Degraded Grassland Mixture Community
Using Astragalus adsurgens,Lotus corniculatus,Coronilla varia,Bromus inermis and Elymus dahuricus as exper-imental materials,10 mixed broadcasting combinations and 5 single broadcasting controls were set up to analyze the inter-specific competition relationship in degraded grassland mixture communities using Jonathan method.The results showed that the plant height and hay yield of each component in the mixed broadcasting treatment 3(Astragalus adsurgens+Lotus cor-niculatus+Bromus inermis)were higher than those in the single broadcasting treatment and other mixed broadcasting treat-ments,which indicating that this combination was the most suitable for promotion and application in the combinations and improvement of degraded grasslands in the experimental site.The relative total yield of different mixed broadcasting treat-ments was greater than 1,which indicating that all combinations exhibit a coexistence relationship.In the mixed broadcast-ing experiment of leguminous and gramineous plants,leguminous plants showed more intraspecies competition than interspe-cies competition,while gramineous plants showed more interspecies competition than intraspecies competition.
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