气候变暖背景下高寒草甸土壤微生物对植物生长的影响

Soil microbes are an important part of terrestrial ecosystems and play an important role in regulating nutrient cycling, plant growth and community structure. However, how will the soil microbial community structure change under global climate change? Will the soil microbial change influence aboveground plants? These questions have not been systematically answered so far. To answer the above questions, we plan to investigate the soil microbial community structure and functioning on base of the long-term warming platform in an alpine meadow ecosystem together with soil microbial inoculation experiments. The soil microbial composition, the related functional traits such as plant biomass and nutrient content will be measured to clarify the influence of climate warming on soil microbial community structure and feedback to plants, and further reveal the coupling mechanism between soil microbial community structure and ecological function. The expected results of this project will enrich our understanding of soil microbial communities and functions in alpine meadows, and provide scientific evidence and technical support for the management of alpine meadow pastures under global climate change.

土壤微生物是陆地生态系统的重要组成部分，在调控土壤元素循环、植物生长和群落组成方面具有重要作用。然而，气候变暖如何影响土壤微生物的群落结构？微生物的群落变化又会如何影响地上植物？这些问题迄今未得到系统的回答。针对上述问题，本项目拟利用高寒草甸的长期增温平台，结合人工温室土壤微生物接种实验，通过测定土壤微生物群落结构、植物生物量、氮磷含量等相关指标，在阐明气候变暖对土壤微生物群落结构影响的基础上，重点探究土壤微生物对植物生长的影响作用，进一步揭示土壤微生物群落结构与生态功能间的偶联机制。本项目的预期结果将丰富我们对高寒草甸土壤微生物群落与功能的理解，并为全球气候变化下的高寒草甸草场管理提供科学依据和技术支撑。

气候变暖是气候变化的重要方面，可以通过多种途径影响生态系统，但我们尚缺乏在气候变暖背景下对土壤微生物如何影响植物生长的相关认识。本项目利用高寒草甸的长期增温实验平台，结合土壤微生物接种实验，通过测定土壤微生物群落组成和植物生长，以探究气候变暖背景下土壤微生物对植物生长的影响作用。研究内容包括：1）气候变暖如何影响土壤微生物的群落结构；2）模拟增温如何影响植物根系真菌；3）增温条件下土壤微生物对高寒草地优势植物生长的影响作用。本研究丰富了我们对高寒草甸土壤微生物群落与功能的理解，并为全球气候变化下的高寒草甸草场管理提供科学依据和技术支撑。