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Genotypic variation in maize (Zea mays) influences rates of soil organic matter mineralization and gross nitrification

Creator: Mwafulirwa, L.
Creator: Paterson, E.
Creator: Cairns, J.E.
Creator: Daniell, T.J.
Creator: Thierfelder, C.
Creator: Baggs, E.M.
Year: 2021
URI: https://hdl.handle.net/10883/21583
Language: English
Publisher: Wiley
Copyright: CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose
Type: Article
Country focus: Southern Africa
Place of Publication: United Kingdom
Pages: 2015-2028
Issue: 5
Volume: 231
DOI: 10.1111/nph.17537
Keywords: Genotype-by-Management History Interaction
Keywords: Genotypic Variation
Keywords: Maize Varieties
Description: Agricultural management practices that increase soil organic matter (SOM), such as no-tillage (NT) with crop residue retention, together with crop varieties best able to source nutrients from SOM, may help reverse soil degradation and improve soil nutrient supply and uptake by plants in low-input environments of tropical and subtropical areas. Here, we screened germplasm representing genetic diversity within tropical maize breeding programmes in relation to shaping SOM mineralization. Then we assessed effects of contrasting genotypes on nitrification rates, and genotype-by-management history interactions on these rates. SOM-C mineralization and gross nitrification rates varied under different maize genotypes. Cumulative SOM-C mineralization increased with root diameter but decreased with increasing root length. Strong influences of management history and interaction of maize genotype-by-management history on nitrification were observed. Overall, nitrification rates were higher in NT soil with residue retention. We propose that there is potential to exploit genotypic variation in traits associated with SOM mineralization and nitrification within breeding programmes. Root diameter and length could be used as proxies for root–soil interactions driving these processes. Development of maize varieties with enhanced ability to mineralize SOM combined with NT and residue retention to build/replenish SOM could be key to sustainable production.
Agrovoc: GENOTYPES
Agrovoc: MAIZE
Agrovoc: VARIETIES
Agrovoc: NITRIFICATION
Agrovoc: ZERO TILLAGE
Agrovoc: PLANT SOIL RELATIONS
Agrovoc: SOIL ORGANIC MATTER
Agrovoc: MINERALIZATION
Related Datasets: https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.17537#support-information-section
ISSN: 0028-646X
Journal: New Phytologist


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  • Maize
    Maize breeding, phytopathology, entomology, physiology, quality, and biotech
  • Sustainable Intensification
    Sustainable intensification agriculture including topics on cropping systems, agronomy, soil, mechanization, precision agriculture, etc.

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