Seasonal Variability of Soil Organic Carbon Fractions Under Arable Land

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Title:Main Title: Seasonal Variability of Soil Organic Carbon Fractions Under Arable Land
Description:Abstract: Carbon fractions in soils apparently vary not only in space, but also over time. A lack of knowledge on the seasonal variability of labile carbon fractions under arable land hampers the reliability and comparability of soil organic carbon (SOC) surveys from different studies. Therefore, we studied the seasonal variability of two SOC fractions, particulate organic matter (POM) and dissolved organic carbon (DOC), under maize cropping: POM was determined as the SOC content in particle-size fractions, and DOC was measured as the water-extractable SOC (WESOC) of air-dried soil. Ammonium, nitrate, and water-extractable nitrogen were measured as potential regulating factors of WESOC formation because carbon and nitrogen cycles in soils are strongly connected. There was a significant annual variation of WESOC (coefficient of variation (CV) = 30%). Temporal variations of SOC in particle-size fractions were smaller than those of WESOC. The stocks of SOC in particle-size fractions decreased with decreasing particle sizes, exhibiting a CV of 20% for the coarse sand-size fraction (250–2 000 µm), of 9% for the fine sand-size fraction (50–250 µm), and of 5% for the silt-size fraction (20–50 µm). The WESOC and SOC in particle-size fractions both peaked in March and reached the minimum in May/June and August, respectively. These results indicate the importance of the time of soil sampling during the course of a year, especially when investigating WESOC.
Identifier:10.1016/S1002-0160(17)60326-6 (DOI)
Responsible Party
Creators:Henning Schiedung (Author), Ludger Bornemann (Author), Gerd Welp (Author)
Publisher:Elsevier
Publication Year:2017
Topic
TR32 Topic:Soil
Related Subproject:B3
Subjects:Keywords: Soil Organic Matter, Soil
File Details
Filename:Schiedung_2017a.pdf
Data Type:Text - Article
File Size:342 KB
Date:Submitted: 20.06.2016
Mime Type:application/pdf
Data Format:PDF
Language:English
Status:Completed
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Download Permission:Only Project Members
General Access and Use Conditions:According to the TR32DB data policy agreement.
Access Limitations:According to the TR32DB data policy agreement.
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Publication Status:Published
Review Status:Peer reviewed
Publication Type:Article
Article Type:Journal
Source:Pedosphere
Source Website:http://www.sciencedirect.com/science/article/pii/S1002016017603266
Issue:2
Volume:27
Number of Pages:7 (380 - 386)
Metadata Details
Metadata Creator:Nele Meyer
Metadata Created:18.05.2017
Metadata Last Updated:18.05.2017
Subproject:B3
Funding Phase:3
Metadata Language:English
Metadata Version:V50
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