Biochar production and application in small-scale farming in Kenya : Yield increases and local perceptions
(2019) Agricultural Research for Development Conference 2019- Abstract
- Degradation of agricultural soils and forest resources are two pervasive challenges in rural landscapes of sub-Saharan Africa. Biochar-producing biomass gasification technologies attract evermore interest because these can empower small-scale farmers to produce energy and food more sustainably by
improving energy use efficiencies, lowering emissions and strengthening climate resilience. In order to assess the potential impacts and the feasibility of soil biochar amendments we are carrying out on-farm trials with 150 households in three agroecosystems in Kenya. A participatory approach was followed for testing uptake of gasifier cook stoves and effects of biochar use on crop production. The outcomes that will be presented include: (a)... (More) - Degradation of agricultural soils and forest resources are two pervasive challenges in rural landscapes of sub-Saharan Africa. Biochar-producing biomass gasification technologies attract evermore interest because these can empower small-scale farmers to produce energy and food more sustainably by
improving energy use efficiencies, lowering emissions and strengthening climate resilience. In order to assess the potential impacts and the feasibility of soil biochar amendments we are carrying out on-farm trials with 150 households in three agroecosystems in Kenya. A participatory approach was followed for testing uptake of gasifier cook stoves and effects of biochar use on crop production. The outcomes that will be presented include: (a) the degree of feasibility, (b) the effects on crop yields, (c) the general attitudes towards the idea of using the cookstoves to produce biochar, and (d) patterns of biomass fuel use. Effects of domestically produced biochar, at rates of 1-10 t DW ha-1, on the production of maize (Zea mays) and kale (Brassica oleracea) were compared with normal farming practices. At the site located in Kwale the yield increases of maize showed a strong positive correlation with biochar dose. In the first season, yields increased from 0.9 Mg ha-1 in the control plot to 4.4
Mg ha-1 in average in the biochar-amended plots. At another site (Siaya), an average biochar dose of 2.8 Mg ha-1 lead to an increase in maize yields from 2.9 to 3.8 Mg ha-1 in average in the first season and from 1.7 to 2.5 Mg ha-1 in the second season after biochar addition. Findings from this action research indicate that producing and using biochar on small-scale farms offers suitable opportunities to close yield gaps across Kenya and in similar agro-ecological environments. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/ad144337-b4f6-4cb4-bd94-10a59208162b
- author
- Mahmoud, Yahia LU ; K Gitau, James ; Karltun, Erik ; Kätterer, Thomas ; Kimutai, Geoffrey ; Njenga, Mary ; Nyberg, Gert ; Roing de Nowina, Kristina ; Roobroek, Dries and Sundberg, Cecilia
- organization
- publishing date
- 2019-09-25
- type
- Contribution to conference
- publication status
- published
- subject
- keywords
- Biochar, Soil carbon mineralisation, Sustainable development
- conference name
- Agricultural Research for Development Conference 2019
- conference location
- Uppsala, Sweden
- conference dates
- 2019-09-25 - 2019-09-26
- language
- English
- LU publication?
- yes
- id
- ad144337-b4f6-4cb4-bd94-10a59208162b
- date added to LUP
- 2019-09-26 13:37:59
- date last changed
- 2019-09-26 14:12:42
@misc{ad144337-b4f6-4cb4-bd94-10a59208162b,
abstract = {{Degradation of agricultural soils and forest resources are two pervasive challenges in rural landscapes of sub-Saharan Africa. Biochar-producing biomass gasification technologies attract evermore interest because these can empower small-scale farmers to produce energy and food more sustainably by<br/>improving energy use efficiencies, lowering emissions and strengthening climate resilience. In order to assess the potential impacts and the feasibility of soil biochar amendments we are carrying out on-farm trials with 150 households in three agroecosystems in Kenya. A participatory approach was followed for testing uptake of gasifier cook stoves and effects of biochar use on crop production. The outcomes that will be presented include: (a) the degree of feasibility, (b) the effects on crop yields, (c) the general attitudes towards the idea of using the cookstoves to produce biochar, and (d) patterns of biomass fuel use. Effects of domestically produced biochar, at rates of 1-10 t DW ha-1, on the production of maize (Zea mays) and kale (Brassica oleracea) were compared with normal farming practices. At the site located in Kwale the yield increases of maize showed a strong positive correlation with biochar dose. In the first season, yields increased from 0.9 Mg ha-1 in the control plot to 4.4<br/>Mg ha-1 in average in the biochar-amended plots. At another site (Siaya), an average biochar dose of 2.8 Mg ha-1 lead to an increase in maize yields from 2.9 to 3.8 Mg ha-1 in average in the first season and from 1.7 to 2.5 Mg ha-1 in the second season after biochar addition. Findings from this action research indicate that producing and using biochar on small-scale farms offers suitable opportunities to close yield gaps across Kenya and in similar agro-ecological environments.}},
author = {{Mahmoud, Yahia and K Gitau, James and Karltun, Erik and Kätterer, Thomas and Kimutai, Geoffrey and Njenga, Mary and Nyberg, Gert and Roing de Nowina, Kristina and Roobroek, Dries and Sundberg, Cecilia}},
keywords = {{Biochar; Soil carbon mineralisation; Sustainable development}},
language = {{eng}},
month = {{09}},
title = {{Biochar production and application in small-scale farming in Kenya : Yield increases and local perceptions}},
year = {{2019}},
}