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A Boundary Plane Approach to Map Hotspots for Achievable Soil Carbon Sequestration and Soil Fertility Improvement

Piikki, Kristin and Söderström, Mats and Sommer, Rolf and da Silva, Mayesse and Munialo, Sussy and Abera, Wuletawu (2019). A Boundary Plane Approach to Map Hotspots for Achievable Soil Carbon Sequestration and Soil Fertility Improvement. Sustainability. 11 , 1-17
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Abstract

Soil organic carbon (SOC) sequestration is important in the global carbon cycle and an integral part of many initiatives and policies to mitigate climate change. For efficient targeting of measures leading to SOC sequestration, it is necessary to know the actual SOC content (%) and a realistic target SOC content (in contrast to the saturation content, which may not be easily achievable) under local biophysical and socioeconomic conditions. We developed a new method for the practical assessment of achievable SOC sequestration concerning soil texture based on a non‐ linear boundary plane approach, also applicable for mapping of SOC sequestration hotspots. The method was tested at two spatial scales (a 125 km2 catchment and a 4 km2 sub‐area of that catchment) in a region in Western Kenya characterized by smallholder farming. Moreover, we assessed the associated benefits of increasing the SOC content from a crop production perspective and found significant correlations between SOC and other soil properties (pH, cation exchange capacity, and various plant‐available macro‐ and micronutrients). This indicates a possible improvement in soil fertility when the SOC content is raised to the modeled target levels, which should be attainable without major changes in land use or agricultural systems.

Authors/Creators:Piikki, Kristin and Söderström, Mats and Sommer, Rolf and da Silva, Mayesse and Munialo, Sussy and Abera, Wuletawu
Title:A Boundary Plane Approach to Map Hotspots for Achievable Soil Carbon Sequestration and Soil Fertility Improvement
Year of publishing :2019
Volume:11
Page range:1-17
Number of Pages:17
Publisher:MDPI
ISSN:2071-1050
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Soil Science
Keywords:soil organic carbon, soil texture, SOC sequestration, hotspot, Western Kenya
URN:NBN:urn:nbn:se:slu:epsilon-p-100930
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-100930
Additional ID:
Type of IDID
DOIhttps://doi.org/10.3390/su11154038
ID Code:16249
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Deposited By: SLUpub Connector
Deposited On:13 Aug 2019 05:44
Metadata Last Modified:13 Aug 2019 05:44

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