LIU Yang,LI Ju,SUN Hui,et al.Stability of Soil Organic Carbon Along the Altitudinal Gradient in Alpine of the West of Sichuan Province[J].Research of Soil and Water Conservation,2020,27(02):123-127,135.
海拔梯度上川西高山土壤有机碳稳定性研究
- Title:
- Stability of Soil Organic Carbon Along the Altitudinal Gradient in Alpine of the West of Sichuan Province
- 文章编号:
- 1005-3409(2020)02-0123-05
- 分类号:
- S153.6
- 文献标志码:
- A
- 摘要:
- 为研究土壤有机碳库极其稳定性对高寒生态系统碳的源汇效应,通过物理—化学方法对不同海拔高度(3 400～4 100 m)高寒土壤不同活性有机碳进行连续分级分离,研究了土壤有机碳不同组分在海拔环境梯度下分布特征及稳定性。结果表明:(1)海拔梯度上高山土壤主要以粗颗粒为主(0.25～2 mm); 在>0.02 mm的物理分级中,土壤有机碳含量随海拔的增加先增加后减小; 在<0.02 mm土壤化学分级的有机—无机复合体中,土壤有机碳占总有机碳比例为2%左右,低于一般低海拔土壤,且随海拔升高有增加的趋势,但在4 100 m海拔处显著降低。(2)有机—无机复合体中的有机碳主要以腐殖质形式存在,随海拔增高有增加的趋势。因此,川西高山海拔梯度上土壤有机碳库以不稳定的颗粒态有机碳(POC)形式存在,在全球气候变化进程中随着温度升高,土壤有机碳矿化速率将加快。
- Abstract:
- In order to explore the effect of soil organic carbon storage and stability on the source and sink of carbon in alpine ecosystems, soil samples were collected along the altitudinal gradients ranging from 3 400 m to 4 100 m in the western Sichuan Province, and organic carbon in these samples were fractionated according to a physio-chemical sequential extract method to evaluate changes in soil carbon stability at different elevations of alpine. The results showed that:(1)the soils along the alpine elevation gradient was dominated by coarse particles(0.25～2 mm), in the physical classification(>0.02 mm), the soil organic carbon content increased at first and then decreased with the increase of the altitude, that was, the soil organic carbon mainly existed in the form of particulate organic carbon; organic-inorganic carbon(carbon in organic-inorganic complex <0.02 mm)increased with altitude except at the highest altitude(4 100 m), the ratio of which was around 2% in total organic carbon and lower than that in lowland soil;(2)humus carbon was the major form of carbon in the organic-inorganic complex, and concent of humus also increased with altitude. Therefore, soil organic carbon of alpine was mainly sequestrated as liable organic carbon in the form of particulate organic carbon in western Sichuan Province, and organic carbon mineralization would be accelerated due to soil warming in the cold area of alpine in scenario of global climate change.
参考文献/References:
[1] Schlesinger W H. Evidence from chronosequence studies for a low carbon-storage potential of soils[J]. Nature, 1990,348(6298):232-234.
[2] Six J, Paustian K, Elliott E T, et al. Soil structure and organic matter: Ⅰ. Distribution of aggregate-size classes and aggregate-associated carbon[J]. Soil Science Society of America Journal, 2000,64(2):681-689.
[3] Jackson R B, Lajtha K, Crow S E, et al. The ecology of soil carbon: pools, vulnerabilities, and biotic and abiotic controls[J]. Annual Review of Ecology, Evolution, and Systematics, 2017,48:419-445.
[4] Melillo J M, Frey S D, Deangelis K M, et al. Long-term pattern and magnitude of soil carbon feedback to the climate system in a warming world[J]. Science, 2017,358(6359):101-105.
[5] Purton K, Pennock D, Leinweber P, et al.Will changes in climate and land use affect soil organic matter composition: Evidence from an ecotonal climosequence[J]. Geoderma, 2015, 253/254:48-60.
[6] 张仲胜,李敏,宋晓林,等.气候变化对土壤有机碳库分子结构特征与稳定性影响研究进展[J].土壤学报,2018,55(2):273-282.
[7] 陶贞,沈承德,高全洲,等.高寒草甸土壤有机碳储量及其垂直分布特征[J].地理学报,2006,61(7):720-728.
[8] 王建林,欧阳华,王忠红,等.高寒草原生态系统表层土壤活性有机碳分布特征及其影响因素[J].生态学报,2009,29(7):3501-3508.
[9] 秦纪洪,王琴,孙辉.川西亚高山—高山土壤表层有机碳及活性组分沿海拔梯度的变化[J].生态学报,2013,33(18):5858-5864.
[10] 孙慧兰,李卫红,杨余辉,等.伊犁山地不同海拔土壤有机碳的分布[J].地理科学,2012,32(5):603-608.
[11] 高俊琴,欧阳华,白军红.若尔盖高寒湿地土壤活性有机碳垂直分布特征[J].水土保持学报,2006,20(1):76-86.
[12] 田玉强,欧阳华,宋明华,等.青藏高原样带高寒生态系统土壤有机碳分布及其影响因子[J].浙江大学学报:农业与生命科学版,2007,33(4):443-449.
[13] Lopez-Sangil L, Rovira P. Sequential chemical extractions of the mineral-associated soil organic matter: An integrated approach for the fractionation of organo-mineral complexes[J]. Soil Biology and Biochemistry, 2013,62:57-67.
[14] Fortuna A, Harwood R R, Paul E A. The effects of compost and crop rotations on carbon turnover and the particulate organic matter fraction[J]. Soil Science, 2003,168(6):434-444.
[15] Walther G R. Community and ecosystem responses to recent climate change[J]. Philosophical Transactions of the Royal Society B: Biological Sciences, 2010, 365(1549):2019-2024.
[16] Du B, Kang H, Pumpanen J, et al. Soil organic carbon stock and chemical composition along an altitude gradient in the Lushan Mountain, subtropical China[J]. Ecological Research, 2014,29(3):433-439.
[17] Leifeld J, Zimmermann M, Fuhrer J, et al. Storage and turnover of carbon in grassland soils along an elevation gradient in the Swiss Alps[J]. Global Change Biology, 2009,15(3):668-679.
[18] 李丹维,王子泉,田海霞,等.太白山不同海拔土壤碳、氮、磷含量及生态化学计量特征[J].土壤学报,2017,54(1):160-170.
[19] Six J, Conant R. T, Paul E, et al. Stabilization mechanisms of soil organic matter: implications for C-saturation of soils[J]. Plant and Soil, 2002,241(2):155-176.
[20] Kammer A, Hagedorn F, Shevchenko I, et al. Treeline shifts in the Ural mountains affect soil organic matter dynamics[J]. Global Change Biology, 2009,15(6):1570-1583.
[21] Hagedorn F, Mulder J, Jandl R. Mountain soils under a changing climate and land-use[J]. Biogeochemistry, 2010,97(1):1-5.
相似文献/References:
[1]刘洋洋,任涵玉,章钊颖,等.中国草地覆盖度时空动态格局及其影响因素[J].水土保持研究,2022,29(02):221.
LIU Yangyang,REN Hanyu,ZHANG Zhaoying,et al.Temporal and Spatial Dynamic Pattern of Grassland Coverage and Its Influencing Factors in China[J].Research of Soil and Water Conservation,2022,29(02):221.
[2]李 焱,戴 睿,张云霞,等.藏西南高原植被NDVI时空变化及其与海拔梯度的关系[J].水土保持研究,2022,29(04):215.
LI Yan,DAI Rui,ZHANG Yunxia,et al.Spatiotemporal Variation of Vegetation NDVI and Its Relationship with Altitude Gradient in Southwest Tibet Plateau[J].Research of Soil and Water Conservation,2022,29(02):215.
备注/Memo
收稿日期:2019-05-14 修回日期:2019-06-04 资助项目:国家自然科学基金(41271094,40871124) 第一作者:刘杨(1995—),女,四川绵阳人,硕士研究生,研究方向为土壤与水环境质量。E-mail:liuyangre@qq.com 通信作者:孙辉(1971—),男,四川南充人,博士,教授,主要从事土壤环境学研究。E-mail:sunhuifiles@gmail.com