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Effects of management practices on legume productivity in smallholder farming systems in sub-Saharan Africa

Muoni, Tarirai and Jonsson, Mattias and Duncan, Alan J. and Watson, Christine A. and Bergkvist, Göran and Barnes, Andrew P. and Öborn, Ingrid (2022). Effects of management practices on legume productivity in smallholder farming systems in sub-Saharan Africa. Food and energy security. 11 :2 , e366
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Abstract

Legumes play a key role in food and nutrition security, providing livestock feed and contributing to soil fertility, in mixed smallholder farms in sub-Saharan Africa (SSA). The environmental conditions under which smallholder farming is practiced are highly heterogeneous with large differences in management practices among farms resulting in variable legume productivity. A meta-analysis based on 128 publications was conducted to quantify the effects of intercropping, inoculation with rhizobia, minimum tillage and phosphorus application on legume grain and biomass yield and the amount of biological nitrogen fixation in a range of SSA contexts. To further explain the heterogeneity in the results, legume species, type of inoculant, P-application rate, altitude, rainfall, soil characteristics and non-legume companion crops were used as moderators. lntercropping as compared to sole cropping reduced legume biomass and grain yields to varying extents, although the total land equivalent ratio for the sum of the intercrops was higher than 1 (1.2-1.9)in all cases. Expressed as the relative land equivalent ratio (rLER) intercropping affected pigeonpea grain yield the least (rLER 0.9) and faba bean the most (rLER 0.3). The non-legume companion crops explained some of the heterogeneity where maize and sorghum significantly reduced the legume yields. Inoculation and P application increased legume grain and biomass yield and moderators such as legume species, type of inoculant, soil organic carbon and soil pH further explained the different effects of the management practices on legume productivity. Minimum tillage had no effect on legume productivity. although less data were available than for the other practices. We conclude that intercropping with legumes improves overall productivity and that application of P fertilizer and inoculants increase legume grain and biomass yield. The effect varies with crop species, soil type and other environmental conditions, and this needs to be factored into tailored recommendations supporting decision making in smallholder farming.

Authors/Creators:Muoni, Tarirai and Jonsson, Mattias and Duncan, Alan J. and Watson, Christine A. and Bergkvist, Göran and Barnes, Andrew P. and Öborn, Ingrid
Title:Effects of management practices on legume productivity in smallholder farming systems in sub-Saharan Africa
Series Name/Journal:Food and energy security
Year of publishing :2022
Volume:11
Number:2
Article number:e366
Number of Pages:19
Publisher:WILEY
ISSN:2048-3694
Language:English
Publication Type:Article Review/Survey
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
(A) Swedish standard research categories 2011 > 5 Social Sciences > 502 Economics and Business > Economics
Keywords:biological nitrogen fixation, fodder, grain legumes, inoculation, intercropping, land-equivalent area, meta-analysis, phosphorus application
URN:NBN:urn:nbn:se:slu:epsilon-p-116164
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-116164
Additional ID:
Type of IDID
DOI10.1002/fes3.366
Web of Science (WoS)000748505200001
Scopus2-s2.0-85123900159
ID Code:28385
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Crop Production Ecology
(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:17 Jun 2022 13:26
Metadata Last Modified:17 Jun 2022 13:31

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