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- Wachiye, SheilaUniversity of Kabianga,University of Helsinki (author)
Soil greenhouse gas emissions from a sisal chronosequence in Kenya
- Article/chapterEnglish2021
Publisher, publication year, extent ...
- Elsevier BV,2021
- 15 s.
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- LIBRIS-ID:oai:lup.lub.lu.se:c066d839-185c-48f1-bcfa-23c0ebe7b1f4
- https://lup.lub.lu.se/record/c066d839-185c-48f1-bcfa-23c0ebe7b1f4URI
- https://doi.org/10.1016/j.agrformet.2021.108465DOI
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- Language:English
- Summary in:English
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- SwePubSwePub
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- Sisal (Agave sisalana) is a climate-resilient crop grown on large-scale farms in semi-arid areas. However, no studies have investigated soil greenhouse gas (GHGs: CO2, N2O and CH4) fluxes from these plantations and how they relate to other land cover types. We examined GHG fluxes (Fs) in a sisal chronosequence at Teita Sisal Estatein southern Kenya. The effects of stand age on Fs were examined using static GHG chambers and gas chromatography for a period of one year in seven stands: young stands aged 1–3 years, mature stands aged 7–8 years, and old stands aged 13–14 years. Adjacent bushland served as a control site representing the surrounding land use type. Mean CO₂ fluxes were highest in the oldest stand (56 ± 3 mg C m-2 h-1) and lowest in the 8-year old stand (38 ± 3 mg C m-2 h-1), which we attribute to difference in root respiration between the stand. All stands had 13–28% higher CO₂ fluxes than bushland (32 ± 3 mg C m-2 h-1). CO2 fluxes in the wet season were about 70% higher than dry season across all sites. They were influenced by soil water content (WS) and vegetation phenology. Mean N2O fluxes were very low (<5 μg N m-2 h-1) in all sites due to low soil nitrogen (N) content. About 89% of CH4 fluxes were below the detection limit (LOD ± 0.02 mg C m-2 h-1). Our results imply that sisalplantations have higher soil CO2 emissions than the surrounding land use type, and the seasonal emissions were largely driven by WS and the vegetation status. Methane and nitrous oxide are of minor importance. Thus, soil GHG fluxes from sisal plantations are a minor contributor to agricultural GHG emissions in Kenya.
Subject headings and genre
- NATURVETENSKAP Geovetenskap och miljövetenskap Naturgeografi hsv//swe
- NATURAL SCIENCES Earth and Related Environmental Sciences Physical Geography hsv//eng
- NATURVETENSKAP Geovetenskap och miljövetenskap Meteorologi och atmosfärforskning hsv//swe
- NATURAL SCIENCES Earth and Related Environmental Sciences Meteorology and Atmospheric Sciences hsv//eng
- Carbon dioxide (CO2);
- Static chamber
- Land-use change
- Methane (CH4)
- Nitrous oxide (N2O)
- Soil moisture
- Sub-Saharan Africa
Added entries (persons, corporate bodies, meetings, titles ...)
- Merbold, LutzInternational Livestock Research Institute Nairobi,Agroscope (author)
- Vesala, TimoMazingira Centre, International Livestock Research Institute,Yugra State University,University of Helsinki (author)
- Rinne, JanneLund University,Lunds universitet,BECC: Biodiversity and Ecosystem services in a Changing Climate,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,ICOS Sweden,Institutionen för naturgeografi och ekosystemvetenskap,Centre for Environmental and Climate Science (CEC),Faculty of Science,Dept of Physical Geography and Ecosystem Science(Swepub:lu)ja4127ri (author)
- Leitner, SonjaInternational Livestock Research Institute Nairobi (author)
- Räsänen, MattiUniversity of Helsinki (author)
- Vuorinne, IljaUniversity of Helsinki (author)
- Heiskanen, JanneUniversity of Helsinki (author)
- Pellikka, PetriUniversity of Helsinki (author)
- University of KabiangaUniversity of Helsinki (creator_code:org_t)
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- In:Agricultural and Forest Meteorology: Elsevier BV3071873-22400168-1923
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- Vuorinne, Ilja
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