scholarly journals Assessment of Labile Organic Carbon in Soil Using Sequential Fumigation Incubation Procedures

10.3791/54614 ◽  
2016 ◽  
Author(s):  
Michael A. Blazier ◽  
Hal O. Liechty
Keyword(s):  
Organic Carbon ◽  
Labile Organic Carbon

scholarly journals Coastal urbanization alters carbon cycling in Tokyo Bay

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Atsushi Kubo ◽  
Jota Kanda
Keyword(s):  
Organic Carbon ◽  
Sedimentation Rate ◽  
Dissolved Inorganic Carbon ◽  
Sewage Treatment ◽  
Tokyo Bay ◽  
Net Community Production ◽  
Labile Organic Carbon ◽  
Treatment Facilities ◽  
Coastal Urbanization ◽  
Freshwater Inputs

AbstractThe carbon budget of Tokyo Bay, a highly urbanized coastal basin, was estimated using a box model that incorporated inorganic and organic carbon data over an annual cycle (2011–2012). The surface water represented net autotrophic system in which the annual net community production (NCP) was 19 × 1010 gC year−1. The annual loading of dissolved inorganic carbon and total organic carbon (TOC) from freshwater inputs was 11.2 × 1010 and 4.9 × 1010 gC year−1, respectively. The annual TOC sedimentation rate was 3.1 × 1010 gC year−1, similar to the annual air–sea CO2 uptake (5.0 × 1010 gC year−1). Although the NCP and TOC loading from freshwater inputs were respectively 3.0 and 2.7 times lower than those in the 1970s, the TOC sedimentation rate was similar. Therefore, a relatively high carbon efflux from Tokyo Bay likely occurred in the 1970s, including CO2 efflux to the atmosphere and/or export of labile organic carbon to the open ocean. The changes in carbon flow between the 1970s and 2011–2012 resulted from improved water quality due to increased sewage treatment facilities and improved sewage treatment efficiency in the catchment, which decreased the amount of labile organic carbon flowing into the bay.

Interspecific plant competition increases soil labile organic carbon and nitrogen contents

2020 ◽  
Vol 462 ◽  
pp. 117991
Author(s):  
Miaoying Wang ◽  
Jing Yang ◽  
Hailun Gao ◽  
Wenshi Xu ◽  
Mingqiu Dong ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Plant Competition ◽  
Labile Organic Carbon ◽  
Carbon And Nitrogen ◽  
Soil Labile Organic Carbon ◽  
Nitrogen Contents

Total and Labile Carbon in Alfisol Soil Amended with Plant Residual and Livestock Manure

2014 ◽  
Vol 988 ◽  
pp. 411-415
Author(s):  
Hua Zhou ◽  
Wan Tai Yu ◽  
Ying Zhao
Keyword(s):  
Organic Carbon ◽  
Microbial Biomass Carbon ◽  
Rapid Decrease ◽  
Chicken Manure ◽  
Absolute Difference ◽  
Pig Manure ◽  
Biomass Carbon ◽  
Labile Carbon ◽  
Labile Organic Carbon ◽  
One Year

In a situ buried-bag experiment, the seasonal dynamics of soil total organic carbon (TOC) and labile organic carbon in soil amended with maize stalk (MS), chicken manure (CM), pig manure (PM) and mixture of them (MI) were studied in one year. MS with a low N content and high C/N ratio decomposed a little faster than other materials with low C/N ratios. Labile carbon pool – microbial biomass carbon (MBC) and light fraction of organic carbon (LFOC) exhibited an absolute difference in the 365-day incubation period: MS in MBC showed a gentle ascendant tendency; however, CM and PM displayed a rapid decrease. The concentrations of LFOC in all the treatments decreased coincidently nevertheless. MBC was more sensitive to organic material addition than other labile pools, despite of its low level.

Sign in / Sign up

Export Citation Format

Share Document