Soil organic carbon loss and selective transportation under field simulated rainfall events.

The study on the lateral movement of soil organic carbon (SOC) during soil erosion can improve the understanding of global carbon budget. Simulated rainfall experiments on small field plots were conducted to investigate the SOC lateral movement under different rainfall intensities and tillage practi...

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Autores principales:	Xiaodong Nie, Zhongwu Li, Jinquan Huang, Bin Huang, Yan Zhang, Wenming Ma, Yanbiao Hu, Guangming Zeng
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/54e2dcde22174f50bd97bd95820a29f4
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spelling	oai:doaj.org-article:54e2dcde22174f50bd97bd95820a29f42021-11-25T06:02:51ZSoil organic carbon loss and selective transportation under field simulated rainfall events.1932-620310.1371/journal.pone.0105927https://doaj.org/article/54e2dcde22174f50bd97bd95820a29f42014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/25166015/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203The study on the lateral movement of soil organic carbon (SOC) during soil erosion can improve the understanding of global carbon budget. Simulated rainfall experiments on small field plots were conducted to investigate the SOC lateral movement under different rainfall intensities and tillage practices. Two rainfall intensities (High intensity (HI) and Low intensity (LI)) and two tillage practices (No tillage (NT) and Conventional tillage (CT)) were maintained on three plots (2 m width × 5 m length): HI-NT, LI-NT and LI-CT. The rainfall lasted 60 minutes after the runoff generated, the sediment yield and runoff volume were measured and sampled at 6-min intervals. SOC concentration of sediment and runoff as well as the sediment particle size distribution were measured. The results showed that most of the eroded organic carbon (OC) was lost in form of sediment-bound organic carbon in all events. The amount of lost SOC in LI-NT event was 12.76 times greater than that in LI-CT event, whereas this measure in HI-NT event was 3.25 times greater than that in LI-NT event. These results suggest that conventional tillage as well as lower rainfall intensity can reduce the amount of lost SOC during short-term soil erosion. Meanwhile, the eroded sediment in all events was enriched in OC, and higher enrichment ratio of OC (ERoc) in sediment was observed in LI events than that in HI event, whereas similar ERoc curves were found in LI-CT and LI-NT events. Furthermore, significant correlations between ERoc and different size sediment particles were only observed in HI-NT event. This indicates that the enrichment of OC is dependent on the erosion process, and the specific enrichment mechanisms with respect to different erosion processes should be studied in future.Xiaodong NieZhongwu LiJinquan HuangBin HuangYan ZhangWenming MaYanbiao HuGuangming ZengPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 8, p e105927 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xiaodong Nie Zhongwu Li Jinquan Huang Bin Huang Yan Zhang Wenming Ma Yanbiao Hu Guangming Zeng Soil organic carbon loss and selective transportation under field simulated rainfall events.
description	The study on the lateral movement of soil organic carbon (SOC) during soil erosion can improve the understanding of global carbon budget. Simulated rainfall experiments on small field plots were conducted to investigate the SOC lateral movement under different rainfall intensities and tillage practices. Two rainfall intensities (High intensity (HI) and Low intensity (LI)) and two tillage practices (No tillage (NT) and Conventional tillage (CT)) were maintained on three plots (2 m width × 5 m length): HI-NT, LI-NT and LI-CT. The rainfall lasted 60 minutes after the runoff generated, the sediment yield and runoff volume were measured and sampled at 6-min intervals. SOC concentration of sediment and runoff as well as the sediment particle size distribution were measured. The results showed that most of the eroded organic carbon (OC) was lost in form of sediment-bound organic carbon in all events. The amount of lost SOC in LI-NT event was 12.76 times greater than that in LI-CT event, whereas this measure in HI-NT event was 3.25 times greater than that in LI-NT event. These results suggest that conventional tillage as well as lower rainfall intensity can reduce the amount of lost SOC during short-term soil erosion. Meanwhile, the eroded sediment in all events was enriched in OC, and higher enrichment ratio of OC (ERoc) in sediment was observed in LI events than that in HI event, whereas similar ERoc curves were found in LI-CT and LI-NT events. Furthermore, significant correlations between ERoc and different size sediment particles were only observed in HI-NT event. This indicates that the enrichment of OC is dependent on the erosion process, and the specific enrichment mechanisms with respect to different erosion processes should be studied in future.
format	article
author	Xiaodong Nie Zhongwu Li Jinquan Huang Bin Huang Yan Zhang Wenming Ma Yanbiao Hu Guangming Zeng
author_facet	Xiaodong Nie Zhongwu Li Jinquan Huang Bin Huang Yan Zhang Wenming Ma Yanbiao Hu Guangming Zeng
author_sort	Xiaodong Nie
title	Soil organic carbon loss and selective transportation under field simulated rainfall events.
title_short	Soil organic carbon loss and selective transportation under field simulated rainfall events.
title_full	Soil organic carbon loss and selective transportation under field simulated rainfall events.
title_fullStr	Soil organic carbon loss and selective transportation under field simulated rainfall events.
title_full_unstemmed	Soil organic carbon loss and selective transportation under field simulated rainfall events.
title_sort	soil organic carbon loss and selective transportation under field simulated rainfall events.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/54e2dcde22174f50bd97bd95820a29f4
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_version_	1718414222582349824

Soil organic carbon loss and selective transportation under field simulated rainfall events.

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