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Storage and controlling factors of soil organic carbon in alpine wetlands and meadow across the Tibetan Plateau
European Journal of Soil Science ( IF 4.2 ) Pub Date : 2023-05-25 , DOI: 10.1111/ejss.13383 Xiuqing Nie, Dong Wang, Lining Ren, Yangong Du, Guoying Zhou
European Journal of Soil Science ( IF 4.2 ) Pub Date : 2023-05-25 , DOI: 10.1111/ejss.13383 Xiuqing Nie, Dong Wang, Lining Ren, Yangong Du, Guoying Zhou
Alpine wetlands and meadows across the Three Rivers Source Region (TRSR) store high soil organic carbon (SOC). However, information on factors affecting SOC storage is scanty. Herein, we investigated SOC storage and explored factors affecting SOC storage, including climate, soil properties and above- and belowground biomass, using 50 soil profiles across the TRSR on the Tibetan Plateau. The SOC storage was 491.9 ± 158.5 Tg C and 545.2 ± 160.8 Tg C in the TRSR alpine wetlands and meadow, respectively. The SOC stock was positively correlated with the mean annual precipitation. However, no significant correlation between SOC stock and mean annual temperature was observed, as opposed to the global trend. In addition, SOC stock was positively correlated with both the aboveground biomass (AGB) and belowground biomass (BGB). Soil pH indirectly affected SOC stock, while SOC stock positively correlated with Al and Fe oxyhydroxides. Compared with vegetation biomass and climatic factors, soil properties, including soil pH and Al and Fe oxyhydroxides (Alo and Feo), affected not only SOC stock variation but also affected the impact of vegetation and climatic factors on SOC stock. Climate factors, AGB, BGB, soil pH, Alo and Feo jointly accounted for 59% of SOC stock variation in alpine wetlands and 64% of SOC stock variation in alpine meadow. This study suggests that soil properties are the dominant factors affecting SOC variation in alpine wetlands and meadow on the Tibetan Plateau.
中文翻译:
青藏高原高寒湿地和草甸土壤有机碳储量及控制因素
三河源区(TRSR)的高山湿地和草甸储存了大量的土壤有机碳(SOC)。然而,有关影响 SOC 存储的因素的信息却很少。在此,我们利用青藏高原 TRSR 的 50 个土壤剖面,研究了 SOC 储存并探讨了影响 SOC 储存的因素,包括气候、土壤性质以及地上和地下生物量。TRSR高寒湿地和草甸的SOC储存量分别为491.9±158.5 Tg C和545.2±160.8 Tg C。SOC储量与年平均降水量呈正相关。然而,与全球趋势相反,未观察到 SOC 储量与年平均气温之间存在显着相关性。此外,SOC储量与地上生物量(AGB)和地下生物量(BGB)均呈正相关。土壤 pH 值间接影响 SOC 储量,而 SOC 储量与 Al 和 Fe 的羟基氧化物呈正相关。与植被生物量和气候因素相比,土壤性质,包括土壤 pH 值以及铝和铁的羟基氧化物 (Alo和 Fe o),不仅影响 SOC 库的变化,还影响植被和气候因素对 SOC 库的影响。气候因素AGB、BGB、土壤pH、Al2O和Fe2O共同 影响高寒湿地SOC库变化的59%和高寒草甸SOC库变化的64%。本研究表明,土壤性质是影响青藏高原高寒湿地和草甸SOC变化的主导因素。
更新日期:2023-05-25
中文翻译:
青藏高原高寒湿地和草甸土壤有机碳储量及控制因素
三河源区(TRSR)的高山湿地和草甸储存了大量的土壤有机碳(SOC)。然而,有关影响 SOC 存储的因素的信息却很少。在此,我们利用青藏高原 TRSR 的 50 个土壤剖面,研究了 SOC 储存并探讨了影响 SOC 储存的因素,包括气候、土壤性质以及地上和地下生物量。TRSR高寒湿地和草甸的SOC储存量分别为491.9±158.5 Tg C和545.2±160.8 Tg C。SOC储量与年平均降水量呈正相关。然而,与全球趋势相反,未观察到 SOC 储量与年平均气温之间存在显着相关性。此外,SOC储量与地上生物量(AGB)和地下生物量(BGB)均呈正相关。土壤 pH 值间接影响 SOC 储量,而 SOC 储量与 Al 和 Fe 的羟基氧化物呈正相关。与植被生物量和气候因素相比,土壤性质,包括土壤 pH 值以及铝和铁的羟基氧化物 (Alo和 Fe o),不仅影响 SOC 库的变化,还影响植被和气候因素对 SOC 库的影响。气候因素AGB、BGB、土壤pH、Al2O和Fe2O共同 影响高寒湿地SOC库变化的59%和高寒草甸SOC库变化的64%。本研究表明,土壤性质是影响青藏高原高寒湿地和草甸SOC变化的主导因素。