Carbon Sequestration in Agroforestry Systems between Conservation Agriculture and Conventional Practice in The Asal Area of Machakos County, Kenya

Dryland ecosystems have always been prone to relatively high vegetation and general environmental degradation; translating to changes in soil physical and chemical properties and massive carbon losses. Despite their vast surface area, Carbon sequestration therein still remains low. However, this low...

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Autores principales:	Vincent O Rabach, James Koske, Monicah Mucheru Muna, Jonathan Muriuki, Innocent Osoro Ngare
Formato:	article
Lenguaje:	EN ID
Publicado:	Green Engineering Society 2020
Materias:	agroforestry carbon sequestration conventional agriculture conservation agriculture with trees carbon Agriculture (General) S1-972
Acceso en línea:	https://doaj.org/article/6954a9ccdbb142d8a4a18a30d525df89
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spelling	oai:doaj.org-article:6954a9ccdbb142d8a4a18a30d525df892021-12-02T15:22:32ZCarbon Sequestration in Agroforestry Systems between Conservation Agriculture and Conventional Practice in The Asal Area of Machakos County, Kenya2621-47092621-252810.32530/jaast.v4i2.170https://doaj.org/article/6954a9ccdbb142d8a4a18a30d525df892020-08-01T00:00:00Zhttps://kinfopolitani.com/index.php/JAAST/article/view/170https://doaj.org/toc/2621-4709https://doaj.org/toc/2621-2528Dryland ecosystems have always been prone to relatively high vegetation and general environmental degradation; translating to changes in soil physical and chemical properties and massive carbon losses. Despite their vast surface area, Carbon sequestration therein still remains low. However, this low carbon means they are less saturated and therefore a tremendous potential therein to sequester more Carbon. Conservation agriculture with trees (CAWT) presents an opportunity to reduce the degradation and enhance the carbon stocks. This study was set to compare the biomass productivity and carbon sequestration potential of agroforestry between conventional and conservation agriculture practice. The study was carried out as part of ongoing experimentation established in short rain (SR) season of 2012 by the World Agroforestry Centre in a trial site at the Agricultural Training Centre (ATC) in Machakos county, Kenya. The trials adopted a split plot arranged in a randomized complete block design with two farming systems (conventional and conservation agriculture) as the main blocks, 7 treatments and three replicates, summing to a total of 42 plots. In the fields, two shrub species (Calliandra calothyrsus Meissn. and Gliricidia sepium Jacq.) were planted in three different spacing (1.5x1 m, 3x1 m, 4.5x1 m) for maize-legume intercrops. Trees were harvested by coppicing, weighed and leaf/twig samples taken for determination of biomass, which was then converted to Carbon using a conversion factor 0.5. The data was statistically analyzed using ANOVA and means separated using LSD at p <0.05. Results showed significant increase in carbon sequestration under conservation agriculture (p <0.001), with a yearly sequestration potential of between 12.8 and 24 Mg C/ha/yr compared to 11.6-23 Mg C/ha/yr for conventional practice. Calliandra also sequestered more carbon than Gliricidia. CAWT is therefore concluded to be a feasible way of increasing carbon stocks in the drylands.Vincent O RabachJames KoskeMonicah Mucheru MunaJonathan MuriukiInnocent Osoro NgareGreen Engineering Societyarticleagroforestrycarbon sequestrationconventional agricultureconservation agriculture with treescarbonAgriculture (General)S1-972ENIDJournal of Applied Agricultural Science and Technology, Vol 4, Iss 2, Pp 118-133 (2020)
institution	DOAJ
collection	DOAJ
language	EN ID
topic	agroforestry carbon sequestration conventional agriculture conservation agriculture with trees carbon Agriculture (General) S1-972
spellingShingle	agroforestry carbon sequestration conventional agriculture conservation agriculture with trees carbon Agriculture (General) S1-972 Vincent O Rabach James Koske Monicah Mucheru Muna Jonathan Muriuki Innocent Osoro Ngare Carbon Sequestration in Agroforestry Systems between Conservation Agriculture and Conventional Practice in The Asal Area of Machakos County, Kenya
description	Dryland ecosystems have always been prone to relatively high vegetation and general environmental degradation; translating to changes in soil physical and chemical properties and massive carbon losses. Despite their vast surface area, Carbon sequestration therein still remains low. However, this low carbon means they are less saturated and therefore a tremendous potential therein to sequester more Carbon. Conservation agriculture with trees (CAWT) presents an opportunity to reduce the degradation and enhance the carbon stocks. This study was set to compare the biomass productivity and carbon sequestration potential of agroforestry between conventional and conservation agriculture practice. The study was carried out as part of ongoing experimentation established in short rain (SR) season of 2012 by the World Agroforestry Centre in a trial site at the Agricultural Training Centre (ATC) in Machakos county, Kenya. The trials adopted a split plot arranged in a randomized complete block design with two farming systems (conventional and conservation agriculture) as the main blocks, 7 treatments and three replicates, summing to a total of 42 plots. In the fields, two shrub species (Calliandra calothyrsus Meissn. and Gliricidia sepium Jacq.) were planted in three different spacing (1.5x1 m, 3x1 m, 4.5x1 m) for maize-legume intercrops. Trees were harvested by coppicing, weighed and leaf/twig samples taken for determination of biomass, which was then converted to Carbon using a conversion factor 0.5. The data was statistically analyzed using ANOVA and means separated using LSD at p <0.05. Results showed significant increase in carbon sequestration under conservation agriculture (p <0.001), with a yearly sequestration potential of between 12.8 and 24 Mg C/ha/yr compared to 11.6-23 Mg C/ha/yr for conventional practice. Calliandra also sequestered more carbon than Gliricidia. CAWT is therefore concluded to be a feasible way of increasing carbon stocks in the drylands.
format	article
author	Vincent O Rabach James Koske Monicah Mucheru Muna Jonathan Muriuki Innocent Osoro Ngare
author_facet	Vincent O Rabach James Koske Monicah Mucheru Muna Jonathan Muriuki Innocent Osoro Ngare
author_sort	Vincent O Rabach
title	Carbon Sequestration in Agroforestry Systems between Conservation Agriculture and Conventional Practice in The Asal Area of Machakos County, Kenya
title_short	Carbon Sequestration in Agroforestry Systems between Conservation Agriculture and Conventional Practice in The Asal Area of Machakos County, Kenya
title_full	Carbon Sequestration in Agroforestry Systems between Conservation Agriculture and Conventional Practice in The Asal Area of Machakos County, Kenya
title_fullStr	Carbon Sequestration in Agroforestry Systems between Conservation Agriculture and Conventional Practice in The Asal Area of Machakos County, Kenya
title_full_unstemmed	Carbon Sequestration in Agroforestry Systems between Conservation Agriculture and Conventional Practice in The Asal Area of Machakos County, Kenya
title_sort	carbon sequestration in agroforestry systems between conservation agriculture and conventional practice in the asal area of machakos county, kenya
publisher	Green Engineering Society
publishDate	2020
url	https://doaj.org/article/6954a9ccdbb142d8a4a18a30d525df89
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Carbon Sequestration in Agroforestry Systems between Conservation Agriculture and Conventional Practice in The Asal Area of Machakos County, Kenya

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