Does conservation agriculture deliver climate change mitigation through soil carbon sequestration in tropical agro-ecosystems?

2016 ◽  
Vol 220 ◽  
pp. 164-174 ◽  
Author(s):  
David S. Powlson ◽  
Clare M. Stirling ◽  
Christian Thierfelder ◽  
Rodger P. White ◽  
M.L. Jat
Keyword(s):  
Climate Change ◽  
Carbon Sequestration ◽  
Soil Carbon ◽  
Climate Change Mitigation ◽  
Conservation Agriculture ◽  
Soil Carbon Sequestration ◽  
Change Mitigation

scholarly journals Soil Carbon Sequestration Potential of Climate-Smart Villages in East African Countries

Climate ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 124
Author(s):  
Gebermedihin Ambaw ◽  
John W. Recha ◽  
Abebe Nigussie ◽  
Dawit Solomon ◽  
Maren Radeny
Keyword(s):  
Climate Change ◽  
Carbon Sequestration ◽  
Soil Carbon ◽  
Climate Change Mitigation ◽  
Soil Carbon Sequestration ◽  
East African ◽  
African Countries ◽  
Carbon Sequestration Potential ◽  
Sequestration Potential ◽  
Change Mitigation

Climate-Smart Villages (CSVs) were established by the CGIAR Research Program on Climate Change, Agriculture and Food Security (CCAFS) in the East African countries of Kenya, Tanzania and Uganda to test and promote a portfolio of climate-smart agriculture (CSA) practices that have climate change mitigation potential. This study evaluated the soil carbon sequestration potential of these CSVs compared to the control land use that did not have CSA practices. At the one-meter depth, soil carbon stocks increased by 20–70%, 70–86%, and 51–110% in Kenya, Tanzania and Uganda CSVs, respectively, compared to control. Consequently, CSVs contributed to the reduction of emissions by 87–420 Mg CO2 eq ha−1. In the topsoil (0–15 cm), CSVs sequestered almost twice more soil carbon than the control and subsequently emissions were reduced by 42–158 Mg CO2 eq ha−1 under CSVs. The annual increase in carbon sequestration under CSVs ranged between 1.6 and 6.2 Mg C ha−1 yr−1 and substantially varied between the CSA land use types. The forests sequestered the highest soil carbon (5–6 Mg C ha−1 yr−1), followed by grasslands and croplands. The forest topsoil also had lower bulk density compared to the control. The findings suggest that CSA practices implemented through the CSVs approach contribute to climate change mitigation through soil carbon sequestration.

scholarly journals The realities of climate change, conservation agriculture and soil carbon sequestration

2020 ◽  
Vol 26 (6) ◽  
pp. 3188-3189 ◽  
Author(s):  
James R. Hunt ◽  
Corinne Celestina ◽  
John A. Kirkegaard
Keyword(s):  
Climate Change ◽  
Carbon Sequestration ◽  
Soil Carbon ◽  
Conservation Agriculture ◽  
Soil Carbon Sequestration

Evaluating the Role of Community-Managed Forest in Carbon Sequestration and Climate Change Mitigation of Tripura, India

2021 ◽  
Vol 232 (5) ◽  
Author(s):  
Dipankar Deb ◽  
Mary Jamatia ◽  
Jaba Debbarma ◽  
Jitendra Ahirwal ◽  
Sourabh Deb ◽  
...  
Keyword(s):  
Climate Change ◽  
Carbon Sequestration ◽  
Climate Change Mitigation ◽  
Managed Forest ◽  
Change Mitigation

scholarly journals Challenges of soil carbon sequestration in NENA Region

2018 ◽  
Author(s):  
Talal Darwish ◽  
Therese Atallah ◽  
Ali Fadel
Keyword(s):  
Carbon Sequestration ◽  
Soil Carbon ◽  
Agricultural Practices ◽  
Conservation Agriculture ◽  
Belowground Biomass ◽  
Soil Carbon Sequestration ◽  
Nitrogen Fertilizers ◽  
Land Capability ◽  
North East ◽  
Modest Contribution

Abstract. North East North Africa (NENA) region spans over 14 % of the total surface of the Earth and hosts 10 % of its population. Soils of the NENA region are mostly highly vulnerable to degradation, and food security will depend much on sustainable agricultural measures. Weather variability, drought and depleting vegetation are dominant causes of the decline in soil organic carbon (SOC). In this work the situation of SOC was studied, using a land capability model and soil mapping. The land capability model showed that most NENA countries (17 out of 20), suffer from low productive lands (> 80 %). Stocks of SOC were mapped (1 : 5 Million) in topsoils (0–30 cm) and subsoils (30–100 cm). The maps showed that 69 % of soil resources present a stock of SOC below the threshold of 30 t ha−1. The stocks varied between ≈ 10 t ha−1 in shrublands and 60 t ha−1 for evergreen forests. Highest stocks were found in forests, irrigated crops, mixed orchards and saline flooded vegetation. The stocks of SIC were higher than those of SOC. In subsoils, the SIC ranged between 25 and 450 t ha−1, against 20 to 45 t ha−1 for SOC. This paper also highlights the modest contribution of NENA region to global SOC stock in the topsoil not exceeding 4.1 %. The paper also discusses agricultural practices that are favorable to carbon sequestration. Practices of conservation agriculture could be effective, as the presence of soil cover reduces the evaporation, water and wind erosions. Further, the introduction of legumes, as part of a cereal-legume rotation, and the application of nitrogen fertilizers to the cereal, caused a notable increase of SOC after 10 years. The effects of crop rotations on SOC are related to the amounts of above and belowground biomass produced and retained in the system. Some knowledge gaps exist especially in aspects related to the effect of irrigation on SOC, and on SIC at the level of soil profile and soil landscape. Still, major constraints facing soil carbon sequestration are policy relevant and socio-economic in nature, rather than scientific.

scholarly journals Soil Carbon Modelling in Salix Biomass Plantations: Variety Determines Carbon Sequestration and Climate Impacts

Forests ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1529
Author(s):  
Saurav Kalita ◽  
Hanna Karlsson Potter ◽  
Martin Weih ◽  
Christel Baum ◽  
Åke Nordberg ◽  
...  
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Carbon Sequestration ◽  
Climate Change Mitigation ◽  
Biomass Yield ◽  
Climate Impacts ◽  
Carbon Modelling ◽  
Sequestration Potential ◽  
Determining Factor ◽  
Change Mitigation

Short-rotation coppice (SRC) Salix plantations have the potential to provide fast-growing biomass feedstock with significant soil and climate mitigation benefits. Salix varieties exhibit significant variation in their physiological traits, growth patterns and soil ecology—but the effects of these variations have rarely been studied from a systems perspective. This study analyses the influence of variety on soil organic carbon (SOC) dynamics and climate impacts from Salix cultivation for heat production for a Swedish site with specific conditions. Soil carbon modelling was combined with a life cycle assessment (LCA) approach to quantify SOC sequestration and climate impacts over a 50-year period. The analysis used data from a Swedish field trial of six Salix varieties grown under fertilized and unfertilized treatments on Vertic Cambisols during 2001–2018. The Salix systems were compared with a reference case where heat is produced from natural gas and green fallow was the land use alternative. Climate impacts were determined using time-dependent LCA methodology—on a land-use (per hectare) and delivered energy unit (per MJheat) basis. All Salix varieties and treatments increased SOC, but the magnitude depended on the variety. Fertilization led to lower carbon sequestration than the equivalent unfertilized case. There was no clear relationship between biomass yield and SOC increase. In comparison with reference cases, all Salix varieties had significant potential for climate change mitigation. From a land-use perspective, high yield was the most important determining factor, followed by SOC sequestration, therefore high-yielding fertilized varieties such as ‘Tordis’, ‘Tora’ and ‘Björn’ performed best. On an energy-delivered basis, SOC sequestration potential was the determining factor for the climate change mitigation effect, with unfertilized ‘Jorr’ and ‘Loden’ outperforming the other varieties. These results show that Salix variety has a strong influence on SOC sequestration potential, biomass yield, growth pattern, response to fertilization and, ultimately, climate impact.

scholarly journals Result-oriented Agri-Environmental Climate Schemes as a means of promoting climate change mitigation in olive growing

2018 ◽  
Vol 47 (2) ◽  
pp. 141-149 ◽  
Author(s):  
Sergio Colombo ◽  
Beatriz Rocamora-Montiel
Keyword(s):  
Climate Change ◽  
Soil Carbon ◽  
Climate Change Mitigation ◽  
Farming Systems ◽  
Environmental Implications ◽  
Mitigation Potential ◽  
Hybrid Governance ◽  
Legislative Framework ◽  
Change Mitigation ◽  
Oriented Approach

The climate change mitigation potential of olive farming has been widely acknowledged. It has particular relevance in regions such as Andalusia (southern Spain) where olive growing is a key land use activity with significant social, economic and environmental implications. This potential of olive farming, however, is not adequately embodied in current Agri-Environmental Climate Schemes (AECS), which often fail to deliver the expected outcomes. The present article proposes an alternative strategy based on a result-oriented approach to AECS for enhancing soil carbon sequestration in Andalusian olive growing. After reviewing the current legal and institutional situation which forbids the wide application of result-oriented agri-environmental schemes, we suggest the use of alternative territorial governance arrangements, such as hybrid governance structures (HGS), as a framework to support the implementation of a result-oriented approach in the specific case of olive growing. Results indicate that the application of HGS can provide valuable benefits in terms of soil carbon storage. The information provided may be useful in the proposed new legislative framework, at both European and regional level, to promote more sustainable farming systems.

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