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Grain legumes and dryland cereals contribute to carbon sequestration in the drylands of Africa and South Asia

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Relation http://oar.icrisat.org/12093/
https://www.sciencedirect.com/science/article/pii/S0167880923002426
https://doi.org/10.1016/j.agee.2023.108583
 
Title Grain legumes and dryland cereals contribute to carbon sequestration in the drylands of Africa and South Asia
 
Creator Kuyah, S
Muoni, T
Bayala, J
Chopin, P
Dahlin, A S
Hughes, K
Jonsson, M
Kumar, S
Sileshi, G W
Dimobe, K
Öborn, I
 
Subject Intercropping
Millets
Pearl Millet
Finger Millet
Chickpea
Pigeonpea
Groundnut
Sorghum
Asia
Africa
 
Description Grain legumes and drylands cereals including chickpea (Cicer arietinum), common bean (Phaseolus vulgaris),
cowpea (Vigna unguiculata), groundnut (Arachis hypogaea), lentil (Lens culinaris), pigeon pea (Cajanus cajan),
soybean (Glycine max), finger millet (Eleusine coracana), pearl millet (Pennisetum glaucum) and sorghum (Sorghum
bicolor) are the leading sources of food grain in drylands of Africa and South Asia. These crops can help
smallholder agriculture to become more resilient, productive, and profitable, but their quantitative impact on
carbon sequestration is unknown. The aim of this review study was to quantify their contribution to carbon
sequestration across the drylands of Africa and South Asia based on 437 publications with 1319 observations in
studies conducted across 32 countries. Cropping systems with grain legumes showed the greatest increase in soil
organic carbon (SOC) concentrations, while cereals (and pigeon pea) gave the largest amount of aboveground
carbon stock (>2 Mg C ha-1). Estimated carbon stock in post-harvest residues of these crops was 1.51 ± 0.05 Mg
C ha-1 in Africa and 2.29 ± 0.10 Mg C ha-1 in South Asia. These crops produced more aboveground carbon, and
significantly increased SOC, when grown as intercrops. Soils with low initial SOC (32%) showed the greatest potential for carbon sequestration when cropped with grain legumes and dryland
cereals. This study is the first of its kind to provide evidence that grain legumes and drylands cereals improve
carbon sequestration across Africa and South Asia.
 
Publisher Elsevier
 
Date 2023-05-17
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights cc_attribution
 
Identifier http://oar.icrisat.org/12093/1/Agricluture%2C%20Ecosystems%20and%20Environment_355_1-11_2023.pdf
Kuyah, S and Muoni, T and Bayala, J and Chopin, P and Dahlin, A S and Hughes, K and Jonsson, M and Kumar, S and Sileshi, G W and Dimobe, K and Öborn, I (2023) Grain legumes and dryland cereals contribute to carbon sequestration in the drylands of Africa and South Asia. Agriculture, Ecosystems & Environment (TSI), 355. 01-11. ISSN 0167-8809