Abstract: In this study,the roles of different functional groups and pioneer species on the early establishment of alpine artificial grassland were studied through a mixed sowing experiment of different species number combinations (1,3,6,9,12,15) and analysis of the influence of gramineae,forbs,legumes and pioneer species on community traits for the year of 2018 and 2019. This study was aimed to provide some guidance for the selection of different functional groups and pioneer species in the construction of alpine artificial grassland. The results showed that gramineae could significantly increase the aboveground biomass,coverage and height of plant communities in artificial grassland and reduce the number of non-seeded species (P<0.05),while forbs could significantly decrease the aboveground biomass,coverage and height of plant communities (P < 0.05),but increase the number of non-seeded species (P < 0.05). Legumes and pioneer species had little or no influence on aboveground biomass,coverage,height and number of non-seeded species. Therefore,gramineae should be preferred in the construction of alpine artificial grassland for production purposes. When the major concern is on the multifunctionality of artificial grassland,combinations of gramineae and forbs can be selected.

Key words: Artificial grassland, Functional group, Pioneer species, Source region of the Yellow River, Seed sown weight

摘要： 本研究通过2018年和2019年2年不同物种数量（1，3，6，9，12，15）组合混播试验，分析禾本科、豆科、杂类草和先锋种植物对高寒人工草地植物群落性状的影响，研究不同功能群及先锋种植物在高寒人工草地建植初期的作用，以期为高寒人工草地建设中不同功能群及先锋种植物的选择提供一定的依据。结果表明：禾本科植物能大幅增加人工草地植物群落地上生物量、盖度、高度和减少非播种物种数（P<0.05），杂类草则会大幅降低人工草地植物群落地上生物量、盖度和高度（P<0.05），但能增加非播种物种数（P<0.05）；豆科与先锋种植物对群落地上生物量、盖度、高度和非播种物种数影响较小或无影响。因此在建设以生产目的为主的高寒人工草地时，应优先选择禾本科植物；主要考虑草地多功能性时，可选择禾本科植物和杂类草植物组合。

关键词: 人工草地, 功能群, 先锋种, 黄河源区, 种子播种量