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Soil carbon and nitrogen fraction dynamics affected by tillage erosion

Understanding the impact of tillage erosion on soil organic carbon (SOC) and nitrogen (N) fractions is essential for targeted soil conservation in mountainous and hilly areas. However, little is known about this issue. In this study, we selected a tillage erosion-dominated hillslope from the Sichuan...

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Autores principales: Nie, Xiao-Jun, Zhang, He-Bing, Su, Yan-Yan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6851117/
https://www.ncbi.nlm.nih.gov/pubmed/31719614
http://dx.doi.org/10.1038/s41598-019-53077-6
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author Nie, Xiao-Jun
Zhang, He-Bing
Su, Yan-Yan
author_facet Nie, Xiao-Jun
Zhang, He-Bing
Su, Yan-Yan
author_sort Nie, Xiao-Jun
collection PubMed
description Understanding the impact of tillage erosion on soil organic carbon (SOC) and nitrogen (N) fractions is essential for targeted soil conservation in mountainous and hilly areas. However, little is known about this issue. In this study, we selected a tillage erosion-dominated hillslope from the Sichuan Basin, China, to determine the effect of tillage erosion on particulate OC (POC), dissolved OC (DOC), light fraction OC (LFOC), ammonium N (NH(4)(+)-N), nitrate N (NO(3)(−)-N) and alkali-hydrolysable N (AN). Additionally, we investigated the microbial activities in relation to soil C and N dynamics, including soil microbial biomass, β-glucosidase and urease activities. Tillage erosion induced serious soil loss in upper slope positions and soil deposition in lower slope positions. The observations of the various labile OC fraction distributions across the hillslope suggest that tillage erosion exerts less impact on DOC and LFOC dynamics but a notable effect on POC. The distribution pattern in total organic carbon under tillage erosion mainly depends on POC redistribution. The POC redistribution is a major factor affecting microbial activities. The AN is more prone to the tillage erosion impact than NH(4)(+)-N and NO(3)(−)-N. Effective soil conservation measures should be taken to weaken the adverse impacts of tillage erosion on POC and AN redistribution in sloping farmlands.
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spelling pubmed-68511172019-11-19 Soil carbon and nitrogen fraction dynamics affected by tillage erosion Nie, Xiao-Jun Zhang, He-Bing Su, Yan-Yan Sci Rep Article Understanding the impact of tillage erosion on soil organic carbon (SOC) and nitrogen (N) fractions is essential for targeted soil conservation in mountainous and hilly areas. However, little is known about this issue. In this study, we selected a tillage erosion-dominated hillslope from the Sichuan Basin, China, to determine the effect of tillage erosion on particulate OC (POC), dissolved OC (DOC), light fraction OC (LFOC), ammonium N (NH(4)(+)-N), nitrate N (NO(3)(−)-N) and alkali-hydrolysable N (AN). Additionally, we investigated the microbial activities in relation to soil C and N dynamics, including soil microbial biomass, β-glucosidase and urease activities. Tillage erosion induced serious soil loss in upper slope positions and soil deposition in lower slope positions. The observations of the various labile OC fraction distributions across the hillslope suggest that tillage erosion exerts less impact on DOC and LFOC dynamics but a notable effect on POC. The distribution pattern in total organic carbon under tillage erosion mainly depends on POC redistribution. The POC redistribution is a major factor affecting microbial activities. The AN is more prone to the tillage erosion impact than NH(4)(+)-N and NO(3)(−)-N. Effective soil conservation measures should be taken to weaken the adverse impacts of tillage erosion on POC and AN redistribution in sloping farmlands. Nature Publishing Group UK 2019-11-12 /pmc/articles/PMC6851117/ /pubmed/31719614 http://dx.doi.org/10.1038/s41598-019-53077-6 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Nie, Xiao-Jun
Zhang, He-Bing
Su, Yan-Yan
Soil carbon and nitrogen fraction dynamics affected by tillage erosion
title Soil carbon and nitrogen fraction dynamics affected by tillage erosion
title_full Soil carbon and nitrogen fraction dynamics affected by tillage erosion
title_fullStr Soil carbon and nitrogen fraction dynamics affected by tillage erosion
title_full_unstemmed Soil carbon and nitrogen fraction dynamics affected by tillage erosion
title_short Soil carbon and nitrogen fraction dynamics affected by tillage erosion
title_sort soil carbon and nitrogen fraction dynamics affected by tillage erosion
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6851117/
https://www.ncbi.nlm.nih.gov/pubmed/31719614
http://dx.doi.org/10.1038/s41598-019-53077-6
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