We performed a long-term warming experiment in three alpine grassland sites (i.e., site A, B and C with an elevation of 4313, 4513 and 4693 m, respectively) of the Northern Tibetan Plateau since 2010. Aboveground plant production (i.e., normalized difference vegetation index, NDVI; soil adjusted vegetation index, SAVI and aboveground biomass, AGB) and soil fungal function at the 0–10 cm depth were examined in 2017 and 2018. The ITS high-throughout sequencing technology was used to obtain soil fungal community and then the FUNGuild tool was used to obtain soil fungal function. Experimental warming significantly reduced NDVI, SAVI and AGB by 27.92%, 27.80% and 14.78% at the site A in 2017, respectively. Experimental warming significantly increased the number of trophic model by 41.18% in 2017 and Simpson index at the trophic model level by 46.40% in 2018 at site B. Experimental warming significantly increased the number of guilds by 63.46% and 28.28%, and Shannon index at the guild level by 24.11% and 85.51% at site A and B in 2017, respectively. Experimental warming did not significantly affect the β-diversity of soil fungal function. Aboveground plant production increased significantly with increasing environmental moisture, ammonium nitrogen and the β-diversity of soil fungal function at the guild level, but decreased significantly with increasing environmental temperature and soil pH. The α- and β-diversity of soil fungal function had confounded effects with other factors (i.e. environmental temperature and moisture, soil ammonium and nitrate nitrogen, available phosphorus and pH) on aboveground plant production. In contrast, the exclusive effects of α- and β-diversity of soil fungal function on aboveground plant production was minimal and even negligible. Therefore, soil fungal function had negligible exclusive effects on the response of aboveground plant production to experimental warming in alpine grasslands, Northern Tibet.

自 2010 年以来，我们在青藏高原北部的三个高山草地站点（即，海拔分别为 4313、4513 和 4693 m 的站点 A、B 和 C）进行了长期变暖试验。差异植被指数，NDVI；土壤调整植被指数，SAVI 和地上生物量，AGB）和 0-10 cm 深度的土壤真菌功能于 2017 年和 2018 年进行了检查。采用 ITS 高通量测序技术获得土壤真菌群落然后使用FUNGuild工具获取土壤真菌功能。2017 年，实验性增温使 A 点的 NDVI、SAVI 和 AGB 分别下降了 27.92%、27.80% 和 14.78%。2017 年实验增暖显着增加了营养模型数量 41.18%，营养模型水平的辛普森指数增加了 46。2018 年 B 站点增加了 40%。 2017 年，实验升温显着增加了 63.46% 和 28.28% 的行会数量，行会级别的香农指数在 2017 年分别增加了 24.11% 和 85.51%。实验升温对土壤真菌功能的β多样性没有显着影响。地上植物产量随着环境湿度、铵态氮和土壤真菌功能β-多样性的增加而显着增加，但随着环境温度和土壤pH值的增加而显着下降。土壤真菌功能的α-和β-多样性与其他因素（即环境温度和湿度、土壤铵和硝态氮、有效磷和pH）对地上植物生产有混杂影响。相比之下，土壤真菌功能的α-和β-多样性对地上植物生产的排他性影响很小，甚至可以忽略不计。因此，土壤真菌功能对藏北高寒草地地上植物生产对实验变暖的响应的影响可以忽略不计。