Ten-year long-term organic fertilization enhances carbon sequestration and calcium-mediated stabilization of aggregate-associated organic carbon in a reclaimed Cambisol

Geoderma ◽  
2019 ◽  
Vol 355 ◽  
pp. 113880 ◽  
Author(s):  
Xiaolei Huang ◽  
Zhixin Jia ◽  
Junjie Guo ◽  
Tingliang Li ◽  
Dasheng Sun ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Organic Carbon ◽  
Organic Fertilization

Impact of Long-Term Organic Fertilizer Application on Lignin in Mollisol

2010 ◽  
Vol 113-116 ◽  
pp. 1332-1335 ◽  
Author(s):  
Ning Liu ◽  
Hong Bo He ◽  
Hong Tu Xie ◽  
Zhen Bai ◽  
Xu Dong Zhang
Keyword(s):  
Organic Carbon ◽  
Organic Fertilizer ◽  
Fertilizer Application ◽  
Carbon Pools ◽  
Organic Fertilization ◽  
Degradation Degree ◽  
Northeast Of China ◽  
The Impact ◽  
Cuo Oxidation

Fertilization is one of the essential managements to maintain and increase soil organic carbon (SOC) level in agroecosystems. It has been realized that fertilizer applications influenced the turnover of labile and refractory organic carbon pools in arable soil markedly. However, the dynamic of relatively refractory lignin in response to fertilization is still kept unclear. Therefore, the impact of long-term organic fertilization on the content and degradation degree of lignin in Mollisol was investigated. Lignin monomers were released by alkaline CuO oxidation method and quantified by gas chromatography (GC). At the time scale of decades, lignin was clearly accumulated in soil and the relative accumulation of lignin in SOC was evident after long-term organic fertilizer application. Compared with the unfertilized soil, lower acid to aldehyde ratios of vanillyl and syringyl units induced by organic fertilization suggested a lower degradation degree of lignin incorporated into soil to some extent. It could be concluded that long-term organic fertilization was an effective fertilizer practice for lignin accumulation in soil and SOC sequestration in Mollisol in northeast of China.

scholarly journals Impact of Clay Mineralogy on Stabilization of Soil Organic Carbon for Long-Term Carbon Sequestration

2017 ◽  
Vol 6 (5) ◽  
pp. 2157-2167 ◽  
Author(s):  
Ravi Kumar Meena ◽  
Anil Kumar Verma ◽  
Chiranjeev Kumawat ◽  
Brijesh Yadav ◽  
Atul B. Pawar ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Clay Mineralogy

scholarly journals Blue carbon sequestration dynamics within tropical seagrass sediments: Long-term incubations for changes over climatic scales

2019 ◽  
Author(s):  
Chuan Chee Hoe ◽  
John Barry Gallagher ◽  
Chew Swee Theng ◽  
Norlaila Binti Mohd. Zanuri
Keyword(s):  
Carbon Sequestration ◽  
Organic Carbon ◽  
Loss Rate ◽  
Blue Carbon ◽  
Tight Coupling ◽  
Before And After ◽  
Reactivity Continuum ◽  
Particulate Inorganic Carbon

AbstractDetermination of blue carbon sequestration in seagrass sediments over climatic time scales relies on several assumptions, such as no loss of particulate organic carbon (POC) after one or two years, tight coupling between POC loss and CO2emissions, no dissolution of carbonates and removal of the stable black carbon (BC) contribution. We tested these assumptions via 500-day anoxic decomposition/mineralisation experiments to capture centennial parameter decay dynamics from two sediment horizons robustly dated as 2 and 18 years old. No loss of BC was detected, and decay of POC was best described for both horizons by near-identical reactivity continuum models. The models predicted average losses of 49% and 51% after 100 years of burial and 20–22 cm horizons, respectively. However, the loss rate of POC was far greater than the release rate of CO2, both before and after accounting for CO2from anoxic particulate inorganic carbon (PIC) production, possibly as siderite. The deficit could not be attributed to dissolved organic carbon or dark CO2fixation. Instead, evidence based on δ13CO2, acidity and lack of sulphate reduction suggested methanogenesis. The results indicate the importance of centennial losses of POC and PIC precipitation and possibly methanogenesis in estimating carbon sequestration rates.

Improving modelling estimations of soil organic carbon sequestration in manure-amended croplands

2021 ◽  
Author(s):  
Francis Durnin-Vermette ◽  
Paul Voroney ◽  
Adam Gillespie
Keyword(s):  
Carbon Sequestration ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Greenhouse Gas ◽  
Greenhouse Gas Emission ◽  
Coefficient Of Determination ◽  
Manure Application ◽  
Soil Organic Carbon Sequestration ◽  
Organic Carbon Sequestration

<p>Carbon sequestration reduces GHG emissions while improving soil fertility. In order for carbon sequestration through agriculture to be viable, however, accurate estimations of sequestration values are crucial in order to guide policy-making. Currently, Ontario’s provincial Ministry of Agriculture, Food and Rural Affairs (OMAFRA) uses sequestration values from the federal government’s farm-level greenhouse gas emission model (Holos), however these estimates fall short in one respect: a 2018 analysis demonstrated that manure application is not completely considered in the government’s estimates, which is a critical gap.</p> <p>The main purposes of our study were 1) to assess the accuracy of soil organic carbon estimations of process-based soil carbon models (Century and RothC) which were calibrated with data from long-term manure addition experiments in Ontario, and 2) to modify these models such that they were able to fully take manure application into account when estimating carbon sequestration in Ontario’s croplands, and determine whether this substantially increases model accuracy.</p> <p>The models’ estimations for soil organic carbon sequestration were respectively calibrated and validated using data from two long-term manure addition experiments in Ottawa and Harrow. By calibrating multiple models using multiple datasets, model-specific and site-specific biases were minimized. The statistical analyses consisted of a suite of tests that assess the modelling accuracy compared to baseline measured data: the coefficient of determination (R2), root mean square error (RMSE), average relative error (ARE), and the Nash-Sutcliffe efficiency statistic (NSE).</p> <p>As a result of these improved provincial estimates, Canadians will be better-informed about the greenhouse gas mitigation potential of long-term manure addition to croplands, which will help guide decisions made by policymakers as well as farmers. These improved provincial estimates will also be reported to Canada’s national greenhouse gas inventory, and will be ultimately disclosed to the UN’s Intergovernmental Panel on Climate Change (IPCC) in their global GHG summary report.</p>

Modelling dynamic interactions between soil structure and soil organic matter

2020 ◽  
Author(s):  
Nicholas Jarvis ◽  
Elsa Coucheney ◽  
Claire Chenu ◽  
Anke Herrmann ◽  
Thomas Keller ◽  
...  
Keyword(s):  
Organic Matter ◽  
Carbon Sequestration ◽  
Soil Organic Matter ◽  
Organic Carbon ◽  
Physical Properties ◽  
Management Practices ◽  
Animal Manure ◽  
Soil Bulk Density ◽  
Organic Carbon Content

<p>The aggregated structure of soil is known to reduce rates of soil organic matter (SOM) decomposition and therefore influence the potential for long-term carbon sequestration. In turn, the storage and turnover of SOM strongly determines soil aggregation and thus the physical properties of soil. The two-way nature of these interactions has not yet been explicitly considered in soil organic matter models. In this study, we present and describe a new model of these dynamic feedbacks between SOM storage, soil pore structure and soil physical properties. We show the results of a test of the model against measurements made during 61 years in a field trial located near Uppsala (Sweden) in two treatments with different OM inputs (bare fallow, animal manure). The model was able to successfully reproduce long-term trends in soil bulk density and organic carbon content (SOC), as well as match limited data on soil pore size distribution and surface elevation. The results suggest that the model approach presented here could prove useful in analyses of the effects of soil and crop management practices and climate change on the long-term potential for soil organic carbon sequestration.</p>

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