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Nitrogen addition increases the contents of glomalin-related soil protein and soil organic carbon but retains aggregate stability in a Pinus tabulaeformis forest
Lipeng Sun1; Hang Jing1; Guoliang Wang1,2; Guobin Liu1,2; Liu, GB (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China.; Liu, GB (reprint author), Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Shaanxi, Peoples R China.; Liu, GB (reprint author), Minist Water Resources, Yangling, Shaanxi, Peoples R China.
SubtypeArticle
2018
Source PublicationPEERJ
ISSN2167-8359
description.correspondentemailgbliu@ms.iswc.ac.cn
Volume6
AbstractBackground: Glomalin-related soil protein (GRSP) and soil organic carbon (SOC) contribute to the formation and stability of soil aggregates, but the mechanism by which global atmospheric nitrogen (N) deposition changes soil aggregate stability by altering the distribution of GRSP and SOC in different aggregate fractions remains unknown. Methods: We used a gradient N addition (0-9 g N m(-2) y(-1) ) in Pinus tabulaeformis forest for two years in northeast China and then examined the changes in SOC contents, total GRSP (T-GRSP), and easily extractable GRSP (EE-GRSP) contents in three soil aggregate fractions (macro-aggregate: >250 mu m, micro-aggregate: 250-53 mu m, and fine material: <53 mu m) and their relationship with aggregate stability. Results: (1) The soil was dominated by macro-aggregates. Short term N addition had no significant effect on mean weight diameter (MWD) and geometric mean diameter (GMD). (2) GRSP varied among aggregate fractions, and N addition had different effects on the distribution of GRSP in aggregate fractions. The EE-GRSP content in the macro-aggregates increased initially and then decreased with increasing N addition levels, having a peak value of 0.480 mg g(-1) at 6 g N m(-2)y(-1) The micro-aggregates had the lowest EE-GRSP content (0.148 mg g(-1) ) at 6 g N m(-2)y(-1) . Furthermore, the T-GRSP content significantly increased in the aggregate fractions with the N addition levels. (3) The macro-aggregate had the highest SOC content, followed by the micro-aggregate and the fine material had the lowest SOC content. N addition significantly increased the SOC content in all the aggregate fractions. (4) GRSP and SOC contents were not significantly correlated with MWD. Conclusion: Glomalin-related soil protein and SOC contents increased by N addition, but this increase did not enhance aggregate stability in short term, and the improvement of stability might depend on binding agents and incubation time.
KeywordAggregate Mean Weight Diameter Glomalin-related Soil Protein Soil Organic Carbon Nitrogen Deposition
Subject AreaScience & Technology - Other Topics
DOI10.7717/peerj.5039
Indexed BySCI
Publication Place341-345 OLD ST, THIRD FLR, LONDON, EC1V 9LL, ENGLAND
Language英语
WOS IDWOS:000436338600007
PublisherPEERJ INC
Funding OrganizationNational Natural Science Foundation of China [41671513] ; National Natural Science Foundation of China [41671513] ; National Key Research and Development Program of China [2017YFC0504601] ; National Key Research and Development Program of China [2017YFC0504601]
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8228
Collection水保所科研产出--SCI_2018--SCI
Corresponding AuthorLiu, GB (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China.; Liu, GB (reprint author), Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Shaanxi, Peoples R China.; Liu, GB (reprint author), Minist Water Resources, Yangling, Shaanxi, Peoples R China.
Affiliation1.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Shaanxi, Peoples R China
3.Minist Water Resources, Yangling, Shaanxi, Peoples R China
Recommended Citation
GB/T 7714
Lipeng Sun,Hang Jing,Guoliang Wang,et al. Nitrogen addition increases the contents of glomalin-related soil protein and soil organic carbon but retains aggregate stability in a Pinus tabulaeformis forest[J]. PEERJ,2018,6.
APA Lipeng Sun.,Hang Jing.,Guoliang Wang.,Guobin Liu.,Liu, GB .,...&Liu, GB .(2018).Nitrogen addition increases the contents of glomalin-related soil protein and soil organic carbon but retains aggregate stability in a Pinus tabulaeformis forest.PEERJ,6.
MLA Lipeng Sun,et al."Nitrogen addition increases the contents of glomalin-related soil protein and soil organic carbon but retains aggregate stability in a Pinus tabulaeformis forest".PEERJ 6(2018).
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