Designing a high-yielding maize ideotype for a changing climate in Lombardy plain (northern Italy)

Alessia Perego, Mattia Sanna, Andrea Giussani, Marcello Ermido Chiodini, Mattia Fumagalli, Salvatore Roberto Pilu, Marco Bindi, Marco Moriondo, Marco Acutis

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The expected climate change will affect the maize yields in view of air temperature increase and scarce water availability. The application of biophysical models offers the chance to design a drought-resistant ideotype and to assist plant breeders and agronomists in the assessment of its suitability in future scenarios. The aim of the present work was to perform a model-based estimation of the yields of two hybrids, current vs ideotype, under future climate scenarios (2030-2060 and 2070-2100) in Lombardy (northern Italy), testing two options of irrigation (small amount at fixed dates vs optimal water supply), nitrogen (N) fertilization (300 vs 400kgNha-1), and crop cycle durations (current vs extended). For the designing of the ideotype we set several parameters of the ARMOSA process-based crop model: the root elongation rate and maximum depth, stomatal resistance, four stage-specific crop coefficients for the actual transpiration estimation, and drought tolerance factor.The work findings indicated that the current hybrid ensures good production only with high irrigation amount (245-565mmy-1). With respect to the current hybrid, the ideotype will require less irrigation water (-13%, p<0.01) and it resulted in significantly higher yield under water stress condition (+15%, p<0.01) and optimal water supply (+2%, p<0.05). The elongated cycle has a positive effect on yield under any combination of options. Moreover, higher yields projected for the ideotype implicate more crop residues to be incorporated into the soil, which are positively correlated with the SOC sequestration and negatively with N leaching. The crop N uptake is expected to be adequate in view of higher rate of soil mineralization; the N fertilization rate of 400kgNha-1 will involve significant increasing of grain yield, and it is expected to involve a higher rate of SOC sequestration.

Original languageEnglish
Pages (from-to)497-509
Number of pages13
JournalScience of the Total Environment
Volume499
DOIs
Publication statusPublished - Nov 15 2014
Externally publishedYes

Keywords

  • Climate change
  • Crop model
  • Maize
  • Water use adaptation

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

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  • Cite this

    Perego, A., Sanna, M., Giussani, A., Chiodini, M. E., Fumagalli, M., Pilu, S. R., Bindi, M., Moriondo, M., & Acutis, M. (2014). Designing a high-yielding maize ideotype for a changing climate in Lombardy plain (northern Italy). Science of the Total Environment, 499, 497-509. https://doi.org/10.1016/j.scitotenv.2014.05.092