Soil greenhouse gas emissions from a sisal chronosequence in Kenya

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Wachiye , S A , Merbold , L , Vesala , T , Rinne , J , Leitner , S , Räsänen , M , Vuorinne , I , Heiskanen , J & Pellikka , P 2021 , ' Soil greenhouse gas emissions from a sisal chronosequence in Kenya ' , Agricultural and Forest Meteorology , vol. 307 , 108465 .

Title: Soil greenhouse gas emissions from a sisal chronosequence in Kenya
Author: Wachiye, Sheila Aswani; Merbold, Lutz; Vesala, Timo; Rinne, Janne; Leitner, Sonja; Räsänen, Matti; Vuorinne, Ilja; Heiskanen, Janne; Pellikka, Petri
Contributor organization: Department of Geosciences and Geography
Viikki Plant Science Centre (ViPS)
Institute for Atmospheric and Earth System Research (INAR)
Micrometeorology and biogeochemical cycles
Ecosystem processes (INAR Forest Sciences)
Institute for Atmospheric and Earth System Research (INAR community)
Earth Change Observation Laboratory (ECHOLAB)
Date: 2021-09-15
Language: eng
Number of pages: 15
Belongs to series: Agricultural and Forest Meteorology
ISSN: 0168-1923
Abstract: 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 Estate in 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 (W-S) and vegetation phenology. Mean N2O fluxes were very low (
Subject: 4111 Agronomy
4112 Forestry
1171 Geosciences
Soil moisture
Carbon dioxide (CO2)
Nitrous oxide (N2O)
Methane (CH4)
Sub-Saharan Africa
Land-use change, Static chamber
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion

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