IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Plant soaking decomposition as well as nitrogen and phosphorous release in the water-level fluctuation zone of the Three Gorges Reservoir
Xiao, Liwei1,2,3; Zhu, Bo1,2; Kumwimba, Mathieu Nsenga1,2,3; Jiang, Shiwei1,2
Corresponding AuthorZhu, Bo
2017
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
EISSN1879-1026
Volume592Pages:527-534
SubtypeArticle
Abstract

The operating scheme of the Three Gorges Reservoir results in a summer drought in the water-level fluctuation zone during which plants grow vigorously. In the winter inundation season, soaking plants may decompose and release nutrients resulting in water quality deterioration. This study quantifies the contributions of the underwater decomposition of nine dominant plant species in the water-level fluctuation zone to nutrient release. The insitu litterbag technique was used to study for soaking decomposition over 200 days. All soaking plant species decomposed rapidly at an average rate of 1.99 +/- 0.33% d(-1) in the early stage of soaking (0 to 30 days) and at an average rate of only 0.07 +/- 0.04% d-1 in the later stage (30 to 200 days). After 200 days of soaking, the nine plant species released an average of 312.40 (+/-) 39.97 g kg(-1) organic carbon, 6.71 +/- 4.29 g kg(-1) of nitrogen and 2.25 +/- 1.25 g kg(-1) of phosphorus. A positive relationship was found between soaking plant decomposition rates and initial C/N ratios of 25 to 50, and a negative relationship where the C/N ratios were between 50 and 100. The amounts of total nitrogen or total phosphorus released were significantly negatively correlated with the initial C/N or C/P ratios of the plants. Among the studied plant species, Xanthium sibiricum Patr ex Widder showed high level of nutrient release via soaking decomposition. In contrast, Cynodon dactylon (Linn.) Pers. and Polygonum hydropiper exhibited low levels of nutrient release and are recommended as suitable species for the ecological restoration of the water-level fluctuation zone. Our results demonstrate that after 200 days of soaking plant decomposition, the loadings of total organic carbon, nitrogen, and phosphorus in thewater-level fluctuation zone of the Three Gorges Reservoir were 2942.1, 81.1, and 24.7 kg ha(-1), respectively and therefore could potentially damage the aquatic environment of the reservoir. (C) 2017 Elsevier B.V. All rights reserved.

KeywordPlant Species Litter-bag Decomposition Nutrient Cycling Eutrophication Riparian Zone Three Gorges Reservoir
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.scitotenv.2017.03.104
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS KeywordLEAF-LITTER DECOMPOSITION ; SEMIARID GRASSLAND ; SOIL ; CHINA ; QUALITY ; FOREST ; RATES ; ECOSYSTEM ; DYNAMICS ; WETLANDS
Language英语
Quartile2区
TOP
WOS SubjectEnvironmental Sciences
WOS IDWOS:000400082100055
Funding Organizationkey project of the National Natural Science Foundation of China(41430750)
Citation statistics
Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18622
Collection山地表生过程与生态调控重点实验室
山地灾害与地表过程重点实验室
Affiliation1.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Xiao, Liwei,Zhu, Bo,Kumwimba, Mathieu Nsenga,et al. Plant soaking decomposition as well as nitrogen and phosphorous release in the water-level fluctuation zone of the Three Gorges Reservoir[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2017,592:527-534.
APA Xiao, Liwei,Zhu, Bo,Kumwimba, Mathieu Nsenga,&Jiang, Shiwei.(2017).Plant soaking decomposition as well as nitrogen and phosphorous release in the water-level fluctuation zone of the Three Gorges Reservoir.SCIENCE OF THE TOTAL ENVIRONMENT,592,527-534.
MLA Xiao, Liwei,et al."Plant soaking decomposition as well as nitrogen and phosphorous release in the water-level fluctuation zone of the Three Gorges Reservoir".SCIENCE OF THE TOTAL ENVIRONMENT 592(2017):527-534.
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