若尔盖草本沼泽生物量季节动态、根系周转及碳氮磷储量  

Seasonal dynamics of biomass,root turnover,and carbon,nitrogen and phosphorus storage in Zoige alpine marsh

作　　者：阳维宗 马骁 杨文[1] 刘宏强 赵丽[3] 王耠熠 张聪 董李勤[1] 张昆[3] YANG Wei-zong;MA Xiao;YANG Wen;LIU Hong-qiang;ZHAO Li;WANG Huo-yi;ZHANG Cong;DONG Li-qin;ZHANG Kun(School of Geography and Tourism,Southwest Forestry University,Kunming 650224,China;College of Ecology and Environment,Hainan University,Haikou 570228,China;National Plateau Wetlands Research Center,Southwest Forestry University,Kunming 650224,China)

机构地区：[1]西南林业大学地理与生态旅游学院,昆明650224 [2]海南大学生态与环境学院,海口570228 [3]西南林业大学国家高原湿地研究中心,昆明650224

出　　处：《生态学杂志》2021年第5期1285-1292,共8页Chinese Journal of Ecology

基　　金：云南省教育厅基金项目(2019J0184,2018JS346);云南省院士专家工作站(2019IC012);国家自然科学基金项目(41461022);国家科技基础资源调查专项(2019FY100603);西南林业大学科研启动基金项目(111425)资助。

摘　　要：湿地植被是湿地生态系统的重要组成部分,并对地下碳库有直接与间接影响。以若尔盖高寒草本沼泽为对象,分析草本沼泽生物量季节动态及细根周转特征。结果表明:若尔盖高寒草本沼泽地上生物量和地下生物量季节动态均呈单峰型曲线,其中,地上生物量和地下生物量的最大值分别为518.3和2147.4 g·m^(-2)。7、8、9月0~10 cm土层地下生物量占0~50 cm土层比例均超过50%。其中,0~10 cm土层地下生物量最大值出现在9月上旬。0~50 cm各土层的细根年周转率为0.795~0.936 a-1,其中,细根年周转率最大值出现在0~10 cm土层。若尔盖高寒草本沼泽植物碳储量和磷储量分配均以地下部为主,而植物氮储量分配以地上部为主。本研究结果可为定量评估若尔盖高寒沼泽湿地净初级生产力提供基础数据支撑。Wetland vegetation is an important part of wetland ecosystems and exerts both direct and indirect effects on underground carbon pools.In this study,we measured the seasonal dynamics of biomass and fine root turnover in Zoige alpine marsh.The results showed that the seasonal dynamics of both aboveground and underground biomass of Zoige alpine marsh showed a unimodal pattern,with the maximum values of aboveground biomass and underground biomass being 518.3 and 2147.4 g·m^(-2),respectively.In July,August,and September 2019,underground biomass in the 0-10 cm soil layer accounted for more than 50% of the total biomass in the 0-50 cm soil layer.The maximum value of underground biomass in the 0-10 cm soil layer was found in early September.The average annual turnover rates of fine roots in the 0-50 cm soil layers were 0.795-0.936 a-1,with the maximum in the 0-10 cm soil layer.The carbon and phosphorus reserves of plants were mainly distributed in the underground part,whereas the nitrogen reserve was mainly distributed in the aboveground part.Our results provide basic support for quantitative assessment of net primary productivity of the Zoige alpine marsh.

关 键 词：草本沼泽 生物量 细根 细根周转 元素储量 

分 类 号：Q948[生物学—植物学]