Dynamics of soil organic carbon and nitrogen following agricultural abandonment in a karst region

2017 ◽  
Vol 122 (1) ◽  
pp. 230-242 ◽  
Author(s):  
Dejun Li ◽  
Li Wen ◽  
Liqiong Yang ◽  
Pan Luo ◽  
Kongcao Xiao ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Karst Region ◽  
Agricultural Abandonment ◽  
Carbon And Nitrogen

Forage grass cultivation increases soil organic carbon and nitrogen pools in a karst region, southwest China

2018 ◽  
Vol 29 (12) ◽  
pp. 4397-4404 ◽  
Author(s):  
Dejun Li ◽  
Jing Liu ◽  
Hao Chen ◽  
Liang Zheng ◽  
Li Wen ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Southwest China ◽  
Karst Region ◽  
Forage Grass ◽  
Carbon And Nitrogen ◽  
Nitrogen Pools

Soil Organic Carbon and Nitrogen Variations with Vegetation Succession in Passively Restored Freshwater Wetlands

Wetlands ◽  
2021 ◽  
Vol 41 (1) ◽  
Author(s):  
Yu An ◽  
Yang Gao ◽  
Xiaohui Liu ◽  
Shouzheng Tong ◽  
Bo Liu ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Vegetation Succession ◽  
Freshwater Wetlands ◽  
Carbon And Nitrogen

Soil organic carbon and nitrogen sequestration and turnover in aggregates under subtropical leucaena–grass pastures

Soil Research ◽  
2018 ◽  
Vol 56 (6) ◽  
pp. 632 ◽  
Author(s):  
Kathryn Conrad ◽  
Ram C. Dalal ◽  
Ryosuke Fujinuma ◽  
Neal W. Menzies
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Soil Aggregates ◽  
Soil Mass ◽  
Δ13c And Δ15n ◽  
Organic C ◽  
Carbon And Nitrogen ◽  
Nitrogen Sequestration ◽  
C And N

Stabilisation and protection of soil organic carbon (SOC) in macroaggregates and microaggregates represents an important mechanism for the sequestration of SOC. Legume-based grass pastures have the potential to contribute to aggregate formation and stabilisation, thereby leading to SOC sequestration. However, there is limited research on the C and N dynamics of soil organic matter (SOM) fractions in deep-rooted legume leucaena (Leucaena leucocephala)–grass pastures. We assessed the potential of leucaena to sequester carbon (C) and nitrogen (N) in soil aggregates by estimating the origin, quantity and distribution in the soil profile. We utilised a chronosequence (0–40 years) of seasonally grazed leucaena stands (3–6 m rows), which were sampled to a depth of 0.3 m at 0.1-m intervals. The soil was wet-sieved for different aggregate sizes (large macroaggregates, >2000 µm; small macroaggregates, 250–2000 µm; microaggregates, 53–250 µm; and <53 µm), including occluded particulate organic matter (oPOM) within macroaggregates (>250 µm), and then analysed for organic C, N and δ13C and δ15N. Leucaena promoted aggregation, which increased with the age of the leucaena stands, and in particular the formation of large macroaggregates compared with grass in the upper 0.2 m. Macroaggregates contained a greater SOC stock than microaggregates, principally as a function of the soil mass distribution. The oPOM-C and -N concentrations were highest in macroaggregates at all depths. The acid nonhydrolysable C and N distribution (recalcitrant SOM) provided no clear distinction in stabilisation of SOM between pastures. Leucaena- and possibly other legume-based grass pastures have potential to sequester SOC through stabilisation and protection of oPOM within macroaggregates in soil.

Changes in soil organic carbon and nitrogen following forest expansion on grassland in the Southern Alps

2014 ◽  
Vol 328 ◽  
pp. 103-116 ◽  
Author(s):  
Claudia Guidi ◽  
Lars Vesterdal ◽  
Damiano Gianelle ◽  
Mirco Rodeghiero
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Southern Alps ◽  
Forest Expansion ◽  
Carbon And Nitrogen
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