Abstract: The mixture communities of common vetch with Italian ryegrass under the differ-ent seeding ratio was investigated- The result showed that the biomass of mixture communitieswere higher than that of its monocultural Population, the model of biomass accumulated by mix-ture communities was stable increased.The interspecific competition had been varied as the mix-ture conlmunities developed, the competition ratio of Italian ryegrass had been decreased with itsseeding iatio increased in the communities.The highest yield of dry matter had been gained fromone time cutted communities, but the highest yield of fresh forages from the two and three timescutted communities in all of communities and populations.

Key words: Common vetch, Italian ryegrass, Biomass dynamic, Interspecific competition

摘要： 对箭筈豌豆和一年生黑麦草不同混播比例的研究表明:混播的生物量高于单播,其积累模式为平稳增长型。在同一混播组合中,种间竞争力的强弱随着群落的发育而变化,在生育期间,黑麦草的竞争力高于箭筈豌豆。在不同混播比例中,随着黑麦草比例的增加,其种间竞争力呈下降趋势。一次性则割可获得较高的混播干物质产量,多次刈割可增加鲜草总产量,但不能提高干物质产量。

关键词: 箭筈豌豆, 一年生黑麦草, 种间竞争力, 生物量动态