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Micronutrient deficiencies in African soils and the human nutritional nexus: opportunities with staple crops

Kihara, J. and Bolo, P. and Kinyua, M. and Rurinda, J. and Piikki, Kristin (2020). Micronutrient deficiencies in African soils and the human nutritional nexus: opportunities with staple crops. Environmental Geochemistry and Health. 42 , 3015-3033
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Abstract

A synthesis of available agronomic datasets and peer-reviewed scientific literature was conducted to: (1) assess the status of micronutrients in sub-Saharan Africa (SSA) arable soils, (2) improve the understanding of the relations between soil quality/management and crop nutritional quality and (3) evaluate the potential profitability of application of secondary and micronutrients to key food crops in SSA, namely maize (Zea mays L.), beans (Phaseolus spp. and Vicia faba L.), wheat (Triticum aestivum L.) and rice (Oryza sativa L.). We found that there is evidence of widespread but varying micronutrient deficiencies in SSA arable soils and that simultaneous deficiencies of multiple elements (co-occurrence) are prevalent. Zinc (Zn) predominates the list of micronutrients that are deficient in SSA arable soils. Boron (B), iron (Fe), molybdenum (Mo) and copper (Cu) deficiencies are also common. Micronutrient fertilization/agronomic biofortification increases micronutrient concentrations in edible plant organs, and it was profitable to apply fertilizers containing micronutrient elements in 60-80% of the cases. However, both the plant nutritional quality and profit had large variations. Possible causes of this variation may be differences in crop species and cultivars, fertilizer type and application methods, climate and initial soil conditions, and soil chemistry effects on nutrient availability for crop uptake. Therefore, micronutrient use efficiency can be improved by adapting the rates and types of fertilizers to site-specific soil and management conditions. To make region-wide nutritional changes using agronomic biofortification, major policy interventions are needed.

Authors/Creators:Kihara, J. and Bolo, P. and Kinyua, M. and Rurinda, J. and Piikki, Kristin
Title:Micronutrient deficiencies in African soils and the human nutritional nexus: opportunities with staple crops
Year of publishing :2020
Volume:42
Page range:3015-3033
Number of Pages:19
Publisher:Springer
ISSN:0269-4042
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 > Soil Science
Keywords:Micronutrients, Fertilization, Sub-Saharan Africa, Human nutrition, Soil fertility management, Biofortification, Profitability
URN:NBN:urn:nbn:se:slu:epsilon-p-103838
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-103838
Additional ID:
Type of IDID
DOI10.1007/s10653-019-00499-w
Web of Science (WoS)000505426100001
ID Code:17394
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Deposited By: SLUpub Connector
Deposited On:04 Sep 2020 06:53
Metadata Last Modified:04 Sep 2020 06:53

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