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Characteristics of soil oxidizable stable organic carbon in different restoration years for Substrate of Eco-Restoration of Vegetation Concrete*(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2019 05
Page:
1-9
Research Field:
Articles
Publishing date:

Info

Title:
Characteristics of soil oxidizable stable organic carbon in different restoration years for Substrate of Eco-Restoration of Vegetation Concrete*
Author(s):
CHENG Hu 1 XU Wennian12 XIANG Hanyu 1 LUO Ting1 XIA Dong 3**
1College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang, Hubei 443002, China
2College of Civil Engineering and Architecture, China Three Gorges University, Yichang 443002, China
3College of hydraulic and environmental engineering, China Three Gorges University, Yichang 443002, China
Keywords:
ecological restoration vegetation concretesubstrate of eco-restorationsoil oxidizable stable organic carbon oxidizable organic carbon fractions
CLC:
-
PACS:
DOI:
10.19675/j.cnki.1006-687x.2018.12040
DocumentCode:

Abstract:
Studying the characteristics of soil oxidizable stable organic carbon in different restoration years in of Substrate of Eco-Restoration of Vegetation Concrete is of great significance for understanding the aging of substrate quality. This study was designed to investigate the?pH, moisture content, microbial biomass carbon (MBC), total organic carbon (TOC) and characteristics of oxidizable organic carbon fractions (F 1: very labile fraction of oxidizable organic, F 2: labile organic carbon, F3: less liable fraction of oxidizable organic carbon and F 4: non-labile fraction of oxidizable organic carbon) varied in different restoration years (0, 3, 6, 9, 12 and 15 years) for substrate of Eco-restoration of vegetation concrete. The results showed: 1 ) The total organic carbon (TOC) of substrate had a decreasing trend in the early restoration stage followed by a reduction, a subsequent increase and equilibrium state with an increase in restoration age. 2) The TOC showed no significant difference between restoration of 9 and 15 years, while the F1, F2 and soil?microbial biomass carbon (MBC) were significantly higher for restoration of 9 years than those for restoration of 12 and 15 years. In comparison to the results for restoration of 15 year, the proportion of F 1, F2 and F 3 in TOC for restoration of 9 year decreased from 32.14%, 38.43% and 20.07% to 24.34%, 22.59% and 18.71%, respectively, while that of F 4 increased from 9.99% to 32.36%. 3) The correlation analysis indicated that TOC was not related to F1, F2, F3 and F 4, while the readily oxidizable carbon (ROC) be of significance positively related to F1, F2 and F 3 ( P<0.05). The MBC had significant positive correlation with ROC, F1 and F 2 (P<0.05). The study showed that the internal circulation of the substrate organic carbon was hindered with the increasing year of repairing. The oxidized organic carbon fractions of the substrate can effectively reflect the change of substrate quality.

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Last Update: 2019-03-13