【摘要】 为明确青藏高原不同类型人工草地的生态和经济效益，采用实物量法和投入产出比模型定量评价一年生燕麦人工草地单播、播期调整、混播（燕麦+箭筈豌豆）与多年生人工草地同德短芒披碱草、同德老芒麦、青海草地早熟禾的生态和经济效益。结果表明：（1）不同建植技术下，混播人工草地生态和经济效益更高，且一年生燕麦混播人工草地生态和经济效益显著高于多年生混播人工草地。（2）不同类型人工草地的生态系统服务总价值、C吸收量、O₂释放量和土壤有机碳含量在不同建植技术下差异极显著（P<0.001），且一年生燕麦混播人工草地C吸收量、O₂释放量最高。生态和经济效益评价结果显示：一年生燕麦混播人工草地为最具优势的草地类型。本研究结果可为高寒人工草地建植管理提供科学依据。更多还原

【Abstract】 In order to clarify the ecological and economic benefits of different types of artificial grassland in the Qinghai-Xizang Plateau,physical quantity method and input-output ratio model are adopted to quantitatively evaluate the ecological and economic benefits of annualAvena sativaL. artificial grassland monoculture,sowing period adjustments and mixed sowing(Avena sativaL. plusVicia sativaL.) as well asElymus breviaristatuscv. Tongde,Elymus sibircuscv. Tongde andPoa Pratensis cv. Qinghai of perennial artificial grassland. The results show that:(1) The ecological and economic benefits of mixed sowing artificial grassland are higher under different planting techniques. Besides,the ecological and economic benefits of annualAvena sativaL. mixed sowing artificial grassland are significantly higher than those of perennial mixed sowing artificial grassland.(2) The total value of ecosystem services,the amount of C absorption,the amount of O2released and the content of soil organic carbon of different types of artificial grassland vary significantly under different planting techniques(P< 0. 001). The annualAvena sativaL. mixed sowing artificial grassland has the highest absorption of C and release of O2. The evaluation results of ecological and economic benefits show that annualAvena sativaL. mixed sowing artificial grassland is the most advantageous grassland. The results can provide scientific basis for the establishment and management of alpine artificial grassland.更多还原