Long-term S-fertilization increases carbon sequestration in a sulfur-deficient soil

2014 ◽  
Vol 94 (3) ◽  
pp. 295-301 ◽  
Author(s):  
Mekonnen Giweta ◽  
Miles F. Dyck ◽  
Sukhdev S. Malhi ◽  
Dick Puurveen ◽  
J. A. Robertson
Keyword(s):  
Carbon Sequestration ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Relative Effect ◽  
University Of Alberta ◽  
Rotation System ◽  
The University ◽  
Carbon Concentrations ◽  
Annual Application

Giweta, M., Dyck, M. F., Malhi, S. S., Puurveen, D. and Robertson, J. A. 2014. Long-term S-fertilization increases carbon sequestration in a sulfur-deficient soil. Can. J. Soil Sci. 94: 295–301. We analyzed the change in total soil organic carbon (SOC) in a long-term fertilization experiment (1980–2008) in a wheat–oat–barley–hay–hay rotation system at the University of Alberta Breton Classical plots. Soil samples were taken in 1980, 1990, 1998, 2003 and 2008 from plots that were fertilized with NPKS and NPK. The objective was to compare the relative effect of S fertilization on the SOC stocks in a S-deficient soil. Long-term S fertilization resulted in an increasing trend in soil organic carbon concentrations over 28 yr when N, P and K supply were adequate. The change in SOC with time was significantly different (P<0.05) between the two treatments. Annual application of NPK in combination with S resulted in an increased accumulation of SOC at a rate of 0.11 Mg C ha−1 yr−1 in the 0- to 15-cm depth over NPK alone. Our results suggest that long-term S fertilization in an S-deficient soil helped to sequester C in the soil.

scholarly journals Chemical composition of soil organic carbon changed by long-term monoculture cropping system in Chinese black soil

2018 ◽  
Vol 64 (No. 11) ◽  
pp. 557-563 ◽  
Author(s):  
Yunfa Qiao ◽  
Shujie Miao ◽  
Yingxue Li ◽  
Xin Zhong
Keyword(s):  
Chemical Composition ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Relative Proportion ◽  
Cropping System ◽  
Black Soil ◽  
Chemical Compositions ◽  
Crop Species ◽  
Rotation System

Monoculture is common to meet commodity grain requirements in Northeast China. The effect of long-term monoculture on chemical composition of soil organic carbon (SOC) remains unclear. This study was done to evaluate how changes in chemical compositions of SOC responded to long-term monoculture. To achieve this objective, the chemical compositions of SOC in maize-soybean rotation, continuous soybean and continuous maize were characterized with the nuclear magnetic resonance technique. Two main components, O-alkyl and aromatic C, showed a wider range of relative proportion in monoculture than rotation system across soil profiles, but no difference was observed between two monoculture systems. Pearson’s analysis showed a significant relationship between plant-C and OCH<sub>3</sub>/NCH, alkyl C or alkyl O-C-O, and the A/O-A was closely related to plant-C. The findings indicated a greater influence of monoculture on the chemical composition of SOC compared to rotation, but lower response to crop species.

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

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

&lt;p&gt;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&amp;#8217;s provincial Ministry of Agriculture, Food and Rural Affairs (OMAFRA) uses sequestration values from the federal government&amp;#8217;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&amp;#8217;s estimates, which is a critical gap.&lt;/p&gt; &lt;p&gt;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&amp;#8217;s croplands, and determine whether this substantially increases model accuracy.&lt;/p&gt; &lt;p&gt;The models&amp;#8217; 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).&lt;/p&gt; &lt;p&gt;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&amp;#8217;s national greenhouse gas inventory, and will be ultimately disclosed to the UN&amp;#8217;s Intergovernmental Panel on Climate Change (IPCC) in their global GHG summary report.&lt;/p&gt;

scholarly journals Soil organic carbon concentrations and storage in irrigated cotton cropping systems sown on permanent beds in a Vertosol with restricted subsoil drainage

2013 ◽  
Vol 64 (8) ◽  
pp. 799 ◽  
Author(s):  
N. R. Hulugalle ◽  
T. B. Weaver ◽  
L. A. Finlay ◽  
V. Heimoana
Keyword(s):  
Carbon Sequestration ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Management Practices ◽  
Cropping Systems ◽  
Carbon Dynamics ◽  
Wheat Stubble ◽  
Soil Organic Carbon Dynamics ◽  
Carbon Concentrations

Long-term studies of soil organic carbon dynamics in two- and three-crop rotations in irrigated cotton (Gossypium hirsutum L.) based cropping systems under varying stubble management practices in Australian Vertosols are relatively few. Our objective was to quantify soil organic carbon dynamics during a 9-year period in four irrigated, cotton-based cropping systems sown on permanent beds in a Vertosol with restricted subsoil drainage near Narrabri in north-western New South Wales, Australia. The experimental treatments were: cotton–cotton (CC); cotton–vetch (Vicia villosa Roth. in 2002–06, Vicia benghalensis L. in 2007–11) (CV); cotton–wheat (Triticum aestivum L.), where wheat stubble was incorporated (CW); and cotton–wheat–vetch, where wheat stubble was retained as in-situ mulch (CWV). Vetch was terminated during or just before flowering by a combination of mowing and contact herbicides, and the residues were retained as in situ mulch. Estimates of carbon sequestered by above- and below-ground biomass inputs were in the order CWV >> CW = CV > CC. Carbon concentrations in the 0–1.2 m depth and carbon storage in the 0–0.3 and 0–1.2 m depths were similar among all cropping systems. Net carbon sequestration rates did not differ among cropping systems and did not change significantly with time in the 0–0.3 m depth, but net losses occurred in the 0–1.2 m depth. The discrepancy between measured and estimated values of sequestered carbon suggests that either the value of 5% used to estimate carbon sequestration from biomass inputs was an overestimate for this site, or post-sequestration losses may have been high. The latter has not been investigated in Australian Vertosols. Future research efforts should identify the cause and quantify the magnitude of these losses of organic carbon from soil.

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