eprintid: 10079
rev_number: 18
eprint_status: archive
userid: 1305
dir: disk0/00/01/00/79
datestamp: 2017-07-05 05:52:02
lastmod: 2017-09-05 03:32:06
status_changed: 2017-07-05 05:52:02
type: article
metadata_visibility: show
contact_email: Library-ICRISAT@CGIAR.ORG
creators_name: Masvaya, E N
creators_name: Nyamangara, J
creators_name: Descheemaeker, K
creators_name: Giller, K E
icrisatcreators_name: Masvaya, E N
affiliation: ICRISAT (Bulawayo)
affiliation: Plant Production Systems, Wageningen University (Wageningen)
affiliation: Department of Environmental Science and Technology, Chinhoyi University of Technology (Chinhoyi)
country: Zimbabwe
country: Netherlands
title: Is maize-cowpea intercropping a viable option for smallholder farms in the risky environments of semi-arid southern Africa?
ispublished: pub
subjects: IC
subjects: S1
subjects: S40006
subjects: cr1
subjects: s10
subjects: s2.6
subjects: s28
subjects: s355
subjects: s400001
subjects: s53
divisions: CRPS5
crps: crp1.7
full_text_status: restricted
keywords: Below-ground complementarity; Interspecific facilitation; Land-use efficiency; Niche differentiation; Root distribution; Root length density; Intercropping systems; Maize-cowpea; Cowpea yields; Smallholder farms;
sub-Saharan Africa; Zimbabwe; Over-yielding; Soil fertility
note: We thank the Netherlands Organization for International
Cooperation in Higher Education (NUFFIC) for funding.
abstract: Intercropping cereals with legumes can potentially enhance productivity and soil fertility. There is limited experimental evidence on the mechanisms underlying benefits or risks in intercropping systems and below-ground interactions in intercrops remain largely unstudied. Such understanding can inform strategies towards maximising returns to investments, particularly in poor fertility soils on smallholder farms in semi-arid areas of sub-Saharan Africa. Additive intercropping experiments were established covering several seasons (2010/11–2014/15) and different conditions (on-station and on-farm) to determine effects on soil chemical variables, root dynamics and yield of intercrops. Maize was planted with the first effective rains and received either no fertiliser or 40 kg N ha−1. Cowpea was planted on the same date as maize or three weeks after planting maize in intercrops or sole stands and received no fertiliser. End-of-season available N was highest (P < 0.05) under the late planted intercrop with 40 kg N ha−1 treatment in 2013/14. Addition of 40 kg N ha−1 significantly increased maize grain yield by 500–1100 kg ha−1 in the 2013/14 season. There was generally greater productivity and over-yielding in the intercrops compared with the sole crops; most intercrops had a land equivalent ratio >1. Intercropping, however, resulted in compromised cowpea yields especially under the relay intercrop compared with the sole cowpea stands whilst maize yield was either not affected or improved. We attributed this to the lack of below-ground niche differentiation in root distribution between maize and cowpea. Maize–cowpea intercropping with low doses of N fertiliser resulted in over-yielding compared with monocropping. Intercropping proved to be a robust option across seasons and soil types, confirming that it is a promising option for resource-poor smallholders.
date: 2017-08-01
date_type: published
publication: Field Crops Research
volume: 209
publisher: Elsevier
pagerange: 73-87
id_number: 10.1016/j.fcr.2017.04.016
refereed: TRUE
issn: 03784290
official_url: http://dx.doi.org/10.1016/j.fcr.2017.04.016
related_url_url: https://scholar.google.co.in/scholar?q=Is+maize-cowpea+intercropping+a+viable+option+for+smallholder+farms+in+the+risky+environments+of+semi-arid+southern+Africa%3F&btnG=&hl=en&as_sdt=0%2C5
related_url_type: pub
funders: Netherlands Organization for International Cooperation in Higher Education (NUFFIC)
citation:   Masvaya, E N and Nyamangara, J and Descheemaeker, K and Giller, K E  (2017) Is maize-cowpea intercropping a viable option for smallholder farms in the risky environments of semi-arid southern Africa?  Field Crops Research, 209.  pp. 73-87.  ISSN 03784290     
document_url: http://oar.icrisat.org/10079/1/Is%20maize-cowpea%20intercropping.pdf