Quantifying soil carbon stocks and humification through spectroscopic methods: A scoping assessment in EMBU-Kenya

A soil carbon assessment was performed comparing agricultural cropping systems with natural vegetation along a sampling transect spanning different agro-ecologies on the eastern foot slopes of Mount Kenya in Embu county, 125 km from Nairobi, Kenya. The aim was to determine differences in soil carbon...

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Main Authors:	Segnini, Aline, Posadas, Adolfo, Lopes Silva, Wilson T. da, Milori, Débora M.B.P., Gavilan, Carla, Claessens, Lieven, Quiroz, Roberto
Format:	Artículo
Language:	Inglés
Published:	ELSEVIER 2020
Online Access:	https://repositorio.catie.ac.cr/handle/11554/9334 https://doi.org/10.1016/j.jenvman.2018.12.108

id	RepoCATIE9334
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spelling	RepoCATIE93342022-08-05T19:08:22Z Quantifying soil carbon stocks and humification through spectroscopic methods: A scoping assessment in EMBU-Kenya Segnini, Aline Posadas, Adolfo Lopes Silva, Wilson T. da Milori, Débora M.B.P. Gavilan, Carla Claessens, Lieven Quiroz, Roberto A soil carbon assessment was performed comparing agricultural cropping systems with natural vegetation along a sampling transect spanning different agro-ecologies on the eastern foot slopes of Mount Kenya in Embu county, 125 km from Nairobi, Kenya. The aim was to determine differences in soil carbon stocks and carbon recalcitrance and relate these to soil textural class, altitude, climatic parameters and land use. Soils from main agricultural systems as tea, coffee and maize-based intercropping, as well as from natural vegetation cover were sampled in triplicates, in five layers from 0 to 30 cm in depth and processed for total carbon analysis. The whole soil samples were also analysed using Laser-Induced Fluorescence Spectroscopy (LIFS) to assess carbon humification. Prototype portable equipment intended for future in situ analysis was used in the lab to ascertain the structure of the most recalcitrant and stable carbon present in different agro-ecosystems. In addition, Near Infrared Spectroscopy (NIRS) was tested for the quantitative analysis of soil carbon, showing that it is a reproducible and low-cost method that provided satisfactory results under the processing conditions of the samples. Results showed wide variation in the level and quality of carbon stored in the soils, depending on soil texture, land use, elevation, climate, agricultural practices and land use history. Considering the heterogeneous nature of sampled soils and the performance of NIRS and LIFS, these results can be used as a basis for the development of fully portable systems able to provide rapid, clean and potentially cost-effective relevant information for soil management. 2020-01-14T19:22:41Z 2020-01-14T19:22:41Z 2019 Artículo https://repositorio.catie.ac.cr/handle/11554/9334 https://doi.org/10.1016/j.jenvman.2018.12.108 en Journal of Environmental Management Volume 234, Pages 476-483. 2019 info:eu-repo/semantics/restrictedAccess ELSEVIER
institution	Centro Agronómico Tropical de Investigación y Enseñanza
collection	Repositorio CATIE
language	Inglés
description	A soil carbon assessment was performed comparing agricultural cropping systems with natural vegetation along a sampling transect spanning different agro-ecologies on the eastern foot slopes of Mount Kenya in Embu county, 125 km from Nairobi, Kenya. The aim was to determine differences in soil carbon stocks and carbon recalcitrance and relate these to soil textural class, altitude, climatic parameters and land use. Soils from main agricultural systems as tea, coffee and maize-based intercropping, as well as from natural vegetation cover were sampled in triplicates, in five layers from 0 to 30 cm in depth and processed for total carbon analysis. The whole soil samples were also analysed using Laser-Induced Fluorescence Spectroscopy (LIFS) to assess carbon humification. Prototype portable equipment intended for future in situ analysis was used in the lab to ascertain the structure of the most recalcitrant and stable carbon present in different agro-ecosystems. In addition, Near Infrared Spectroscopy (NIRS) was tested for the quantitative analysis of soil carbon, showing that it is a reproducible and low-cost method that provided satisfactory results under the processing conditions of the samples. Results showed wide variation in the level and quality of carbon stored in the soils, depending on soil texture, land use, elevation, climate, agricultural practices and land use history. Considering the heterogeneous nature of sampled soils and the performance of NIRS and LIFS, these results can be used as a basis for the development of fully portable systems able to provide rapid, clean and potentially cost-effective relevant information for soil management.
format	Artículo
author	Segnini, Aline Posadas, Adolfo Lopes Silva, Wilson T. da Milori, Débora M.B.P. Gavilan, Carla Claessens, Lieven Quiroz, Roberto
spellingShingle	Segnini, Aline Posadas, Adolfo Lopes Silva, Wilson T. da Milori, Débora M.B.P. Gavilan, Carla Claessens, Lieven Quiroz, Roberto Quantifying soil carbon stocks and humification through spectroscopic methods: A scoping assessment in EMBU-Kenya
author_facet	Segnini, Aline Posadas, Adolfo Lopes Silva, Wilson T. da Milori, Débora M.B.P. Gavilan, Carla Claessens, Lieven Quiroz, Roberto
author_sort	Segnini, Aline
title	Quantifying soil carbon stocks and humification through spectroscopic methods: A scoping assessment in EMBU-Kenya
title_short	Quantifying soil carbon stocks and humification through spectroscopic methods: A scoping assessment in EMBU-Kenya
title_full	Quantifying soil carbon stocks and humification through spectroscopic methods: A scoping assessment in EMBU-Kenya
title_fullStr	Quantifying soil carbon stocks and humification through spectroscopic methods: A scoping assessment in EMBU-Kenya
title_full_unstemmed	Quantifying soil carbon stocks and humification through spectroscopic methods: A scoping assessment in EMBU-Kenya
title_sort	quantifying soil carbon stocks and humification through spectroscopic methods: a scoping assessment in embu-kenya
publisher	ELSEVIER
publishDate	2020
url	https://repositorio.catie.ac.cr/handle/11554/9334 https://doi.org/10.1016/j.jenvman.2018.12.108
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Quantifying soil carbon stocks and humification through spectroscopic methods: A scoping assessment in EMBU-Kenya

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