CHEN Zhijun,WANG Shanqi,LIU Lin.Characteristics and Estimation of Lou Soil Aggregate-associated Active Organic Carbon Loss During Sheet Erosion[J].Research of Soil and Water Conservation,2023,30(04):1-9.[doi:10.13869/j.cnki.rswc.2023.04.044.]
片蚀过程中土团聚体活性有机碳流失特征及其量估算
- Title:
- Characteristics and Estimation of Lou Soil Aggregate-associated Active Organic Carbon Loss During Sheet Erosion
- 文章编号:
- 1005-3409(2023)04-0001-09
- 分类号:
- S153.6
- 文献标志码:
- A
- 摘要:
- [目的]揭示土壤团聚体破碎、迁移对活性有机碳流失的影响,建立活性有机碳流失量估算方程,为评估水蚀作用下土壤有机碳流失与矿化的定量关系提供理论支撑。[方法]以黄土高原典型土为研究对象,设计3种降雨强度(60 mm/h,90 mm/h,120 mm/h)和3个坡度(5°,10°,15°),采用人工模拟降雨技术,通过建立经验方程,对活性有机碳流失量进行估算。[结果]相较雨强,坡度对土壤轻组有机碳(light fraction of soil organic carbon,LFoc)流失的影响更明显,片蚀与溅蚀泥沙LFoc含量均随坡度的增大先减小后增大,而雨强对片蚀泥沙LFoc含量无显著影响(p<0.05); 溅蚀泥沙LFoc含量明显低于片蚀,且溅蚀泥沙LFoc未发生明显富集,片蚀泥沙中LFoc发生明显富集; 对比不同粒级团聚体LFoc含量发现,<0.05 mm黏粉粒、0.05～0.25 mm团聚体中LFoc更易于发生富集,而0.25～2 mm团聚体LFoc只在小雨强和小坡度条件下发生富集; 由于<0.02 mm粒级团聚体迁移为LFoc流失的主导因素,基于<0.02 mm粒级团聚体迁移量相关指标,建立了拟合方程,对LFoc流失量进行了估算,拟合效果较好(R2=0.727)。[结论]水蚀过程中径流优先输移活性有机碳是造成有机碳大量矿化的原因,未来可以通过团聚体迁移量较好估算活性有机碳流失量。
- Abstract:
- [Objective] The aim of this study is to explore the response of soil active organic carbon loss to aggregate breakdown and transport, estimate the loss amount of active organic carbon by establishing empirical equations, and provide theoretical support for evaluating the quantitative relationship between soil organic carbon loss and carbon mineralization under water erosion. [Methods] This study took typical Lou soil in the Loess Plateau to conduct artificial simulated rainfall experiments with three rainfall intensities(60 mm/h, 90 mm/h, and 120 mm/h)and three slopes(5°, 10°, and 15°), and the loss amount of active organic carbon was estimated by establishing empirical equations. [Results] Slope gradient had the more important effect on light fraction of soil organic carbon(LFoc)loss than rainfall intensity. Both LFoc concentrations of sheet erosion and splash erosion sediments decreased first and then increased with the increase of slope gradient. Furthermore, rainfall intensity had no significant effect on the LFoc concentration of sheet erosion sediment(p<0.05). The LFoc concentration of splash erosion sediments was obviously lower than that of sheet erosion sediments. Meanwhile, the LFocs were obviously enriched in sheet erosion sediment while those in splash erosion sediments were not obviously enriched. Compared the LFoc concentrations of aggregates with different particle sizes, the results revealed that the LFoc of <0.05 mm clay and silt particles and 0.05～0.25 mm aggregates were more likely to be enriched, while the LFoc of 0.25～2 mm aggregates was enriched only under light rainfall intensities and gentle slopes. As the transport of <0.02 mm aggregates had great correlation with LFoc loss, such a loss was well estimated by the transport amount of <0.02 mm aggregates(R2=0.727). [Conclusion] Runoff preferentially transports active organic carbon during water erosion, which is the reason for the large amount of mineralization of organic carbon. The loss and mineralization of active organic carbon can be well estimated by the amount of the transported aggregates in the future.
参考文献/References:
[1] Wang Z, Yang Y, Li J, et al. Simulation of terrestrial carbon equilibrium state by using a detachable carbon cycle scheme[J]. Ecological Indicators, 2017,75:82-94.
[2] Berhe A A, Harte J, Harden J W, et al. The significance of the erosion-induced terrestrial carbon sink[J]. Bioscience, 2007,57(4):337-346.
[3] Quinton J N, Govers G, Van Oost K, et al. The impact of agricultural soil erosion on biogeochemical cycling[J]. Nature Geoscience, 2010,3(5):311-314.
[4] Pimentel D, Harvey C, Resosudarmo P, et al. Environmental and economic costs of soil erosion and conservation benefits[J]. Science,1995,267(5201):1117-1123.
[5] 马文明,李忠武,丁克毅,等.水力侵蚀作用下土壤有机碳库稳定性机制研究进展[J].中国水土保持科学,2020,18(1):125-130.
[6] 张国,曹志平,胡婵娟.土壤有机碳分组方法及其在农田生态系统研究中的应用[J].应用生态学报,2011,22(7):1921-1930.
[7] Yan D, Wang D, Yang L. Long-term effect of chemical fertilizer, straw, and manure on labile organic matter fractions in a paddy soil[J]. Biology and Fertility of Soils, 2007,44(1):93-101.
[8] Schomakers J, Mayer H, Lee J Y, et al. Soil aggregate breakdown and carbon release along a chronosequence of recovering landslide scars in a subtropical watershed[J]. Catena, 2018,165:530-536.
[9] Trigalet S, Gabarron-Galeote M A, Van Oost K, et al. Changes in soil organic carbon pools along a chronosequence of land abandonment in southern Spain[J]. Geoderma, 2016,268:14-21.
[10] Gregorich E G, beare M H, Mckim U F, et al. Chemical and biological characteristics of physically uncomplexed organic matter[J]. Soil Science Society of America Journal, 2006,70(3):975-985.
[11] Spycher G, Sollins P, Rose S. Carbon and nitrogen in the light fraction of a forest soil:vertical distribution and seasonal patterns[J]. Soil Science, 1983,135(2):79-87.
[12] von Luetzow M, Koegel-Knabner I, Ekschmitt K, et al. SOM fractionation methods: Relevance to functional pools and to stabilization mechanisms[J]. Soil Biology and Biochemistry, 2007,39(9):2183-2207.
[13] Gregorich E G, Carter M R, Angers D A, et al. Towards a minimum data set to assess soil organic matter quality in agricultural soils[J]. Canadian Journal of Soil Science, 1994,74(4):367-385.
[14] Whalen J K, Bottomley P J, Myrold D D. Carbon and nitrogen mineralization from light-and heavy-fraction additions to soil[J]. Soil Biology and Biochemistry, 2000,32(10):1345-1352.
[15] Christensen B T. Physical fractionation of soil and structural and functional complexity in organic matter turnover[J]. European Journal of Soil Science, 2001,52(3):345-353.
[16] Liu X, Wu X, Liang G, et al. A global meta-analysis of the impacts of no-tillage on soil aggregation and aggregate-associated organic carbon[J]. Land Degradation & Development, 2021,32(18):5292-5305.
[17] Jastrow J D. Soil aggregate formation and the accrual of particulate and mineral-associated organic matter[J]. Soil Biology and Biochemistry, 1996,28(4):665-676.
[18] 武天云, Schoenau Jeff J.,李凤民,等.土壤有机质概念和分组技术研究进展[J].应用生态学报,2004,15(4):717-722.
[19] Liu L, Li Z, Xiao H, et al. The transport of aggregates associated with soil organic carbon under the rain-induced overland flow on the Chinese Loess Plateau[J]. Earth Surface Processes and Landforms, 2019,44(10):1895-1909.
[20] Wang X, Cammeraat E L H, Cerli C, et al. Soil aggregation and the stabilization of organic carbon as affected by erosion and deposition[J]. Soil Biology & Biochemistry, 2014,72:55-65.
[21] 范亚琳,刘贤赵,高磊,等.不同培肥措施对红壤坡耕地土壤有机碳流失的影响[J].土壤学报,2019,56(3):638-649.
[22] 裴会敏,许明祥,李强,等.侵蚀条件下土壤有机碳流失研究进展[J].水土保持研究,2012,19(6):269-274.
[23] 胡尧,李懿,侯雨乐.不同土地利用方式对岷江流域土壤团聚体稳定性及有机碳的影响[J].水土保持研究,2018,25(4):22-29.
[24] 栗文玉,刘小芳,赵勇钢,等.黄土丘陵区人工柠条恢复为主小流域土壤有机碳空间变异性及其影响因素[J].水土保持研究,2020,27(2):15-22.
[25] 王伟,李占斌,李鹏,等.生态建设对坡面土壤有机碳分布的影响[J].水土保持研究,2020,27(2):35-41.
[26] 陈永宗.黄土高原土壤侵蚀规律研究工作回顾[J].地理研究,1987,6(1):76-85.
[27] Six J, Elliott E T, Paustian K, et al. Aggregation and Soil Organic Matter Accumulation in Cultivated and Native Grassland Soils[J]. Soil Science Society of America Journal, 1998,5(62):1367-1377.
[28] Ramnarine R, Voroney R P, Dunfield K E, et al. Characterization of the heavy, hydrolysable and non-hydrolysable fractions of soil organic carbon in conventional and no-tillage soils[J]. Soil & Tillage Research, 2018,181:144-151.
[29] 张艺,尹力初,戴齐.后续施肥措施改变对红壤性水稻土团聚体有机碳组分的影响[J].水土保持学报,2016,30(6):278-283.
[30] 鲁如坤.土壤农业化学分析方法[M].北京:中国农业科技出版社,1999.
[31] Starr G C, Lal R, Malone R, et al. Modeling soil carbon transported by water erosion processes[J]. Land Degradation & Development, 2000,11(1):83-91.
[32] 安娟,卢嘉,郑粉莉,等.不同地表条件下黑土区坡耕地侵蚀过程中土壤团聚体迁移[J].水土保持学报,2011,25(6):100-104.
[33] 肖胜生,汤崇军,王凌云,等.自然降雨条件下红壤坡面有机碳的选择性迁移[J].土壤学报,2017,54(4):874-884.
[34] 朱方方,程金花,王书韬,等.湖北低山丘陵区侵蚀泥沙颗粒特征及其与地形因子的关系[J].水土保持学报,2021,35(4):27-33.
[35] 张雪,李忠武,申卫平,等.红壤有机碳流失特征及其与泥沙径流流失量的定量关系[J].土壤学报,2012,49(3):465-473.
[36] Lin J, Fang N, Zhang Y, et al. Dynamics of soil organic carbon in different-sized aggregates under splash erosion[J]. Journal of Soils and Sediments, 2022,22(6):1713-1723.
[37] 闫峰陵.红壤表土团聚体稳定性特征及其对坡面侵蚀过程的影响[D].武汉:华中农业大学,2008.
[38] Liu L, Li Z W, Li Z J, et al. Effect of aggregate breakdown on the unevenly enriched organic carbon process in sediments under a rain-induced overland flow[J]. Soil and Tillage Research, 2020,204:104752.
[39] 刘琳.黄土坡面有机碳迁移流失机制及模拟研究[D].北京:中国科学院大学(中国科学院教育部水土保持与生态环境研究中心),2018.
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备注/Memo
收稿日期:2022-07-04 修回日期:2022-08-06
资助项目:国家自然科学基金(41907055); 中国博士后科学基金(2019M652456); 江苏省研究生科研与实践创新计划项目(SJCX22_1762)
第一作者:陈致君(1997—),女,山东济南人,硕士研究生,研究方向:水土保持与土壤碳循环。E-mail:c806292071@163.com
通信作者:刘琳(1990—),女,山东烟台人,博士,副教授,研究方向:水土保持与土壤碳循环。E-mail:kira_lau123@163.com