退化草地混播群落种间竞争关系研究  

Research on Interspecific Competition Relationship in Degraded Grassland Mixture Community

作　　者：姜树珍 Jiang Shuzhen(Shanxi Provincial Forestry and Grassland Project General Station,Taiyuan 030012,China)

机构地区：[1]山西省林业和草原工程总站,山西太原030012

出　　处：《山西林业科技》2024年第3期37-39,共3页Shanxi Forestry Science and Technology

摘　　要：以豆科的沙打旺、百脉根、小冠花和禾本科的无芒雀麦、披碱草为试验材料,设置10个混播组合和5个单播对照,采用Jonathan的方法分析退化草地混播群落种间竞争关系。结果表明,混播处理3(沙打旺+百脉根+无芒雀麦)的各组分株高和干草产量均高于其单播处理和其他混播处理,表明该组合最适宜在试验地退化草原修复改良中推广应用。不同混播组合的相对总产量均大于1,说明所有组合都表现为共存关系。在豆科和禾本科的混播试验中,豆科植物更多地表现为种内竞争大于种间竞争,而禾本科植物更多地表现为种间竞争大于种内竞争。Using Astragalus adsurgens,Lotus corniculatus,Coronilla varia,Bromus inermis and Elymus dahuricus as experimental materials,10 mixed broadcasting combinations and 5 single broadcasting controls were set up to analyze the interspecific 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 corniculatus+Bromus inermis)were higher than those in the single broadcasting treatment and other mixed broadcasting treatments,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 treatments was greater than 1,which indicating that all combinations exhibit a coexistence relationship.In the mixed broadcasting experiment of leguminous and gramineous plants,leguminous plants showed more intraspecies competition than interspecies competition,while gramineous plants showed more interspecies competition than intraspecies competition.

关 键 词：退化草地 混播 种内竞争 种间竞争 

分 类 号：S54[农业科学—作物学]