Strategies to enhance the productivity of rainfed offseason maize

Bruna Gomes Magalhães, Camilo De Lelis Teixeira De Andrade, Priscila Ponciana Gomes Da Silva, Miguel Marques Gontijo-Neto, Daniela De Carvalho Lopes, Bruno Ferreira De Melo, Axel Garcia Y Garcia

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    In Brazil, off-season rainfed maize is usually affected by limited water due to irregularities in rainfall. Alternatives to mitigate these effects include ground cover to reduce evaporation losses and the use of cultivars with a deeper rooting system. We conducted a study in Goias, Brazil, to evaluate the influence of different crop management strategies to mitigate the effect of limited water in maize yield. Modeling was used to simulate scenarios that consisted of 0, 3.5 and 5.0 t ha-1 of soybean residue left on the soil surface combined with cultivar ideotypes with 0.30 m, 0.50 m 0.70 m deep rooting system grown with 60 and 340 kg ha-1 of nitrogen. The results showed that maintaining residue in the soil surface in combination with the use of cultivars with deeper rooting systems favored higher yields of off-season maize. Our results also indicated that a cultivar with rooting system in the top 0.50 m of the soil fertilized with a high nitrogen rate tended to be more efficient in the use of the soil available water.

    Original languageEnglish (US)
    Title of host publication2016 American Society of Agricultural and Biological Engineers Annual International Meeting, ASABE 2016
    PublisherAmerican Society of Agricultural and Biological Engineers
    ISBN (Electronic)9781510828759
    DOIs
    StatePublished - Jan 1 2016
    Event2016 ASABE Annual International Meeting - Orlando, United States
    Duration: Jul 17 2016Jul 20 2016

    Publication series

    Name2016 American Society of Agricultural and Biological Engineers Annual International Meeting, ASABE 2016

    Other

    Other2016 ASABE Annual International Meeting
    CountryUnited States
    CityOrlando
    Period7/17/167/20/16

    Keywords

    • Modeling
    • No-tillage
    • Off-season maize
    • Rooting system
    • Zea mays L.

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  • Cite this

    Magalhães, B. G., De Andrade, C. D. L. T., Da Silva, P. P. G., Gontijo-Neto, M. M., De Carvalho Lopes, D., De Melo, B. F., & Garcia, A. G. Y. (2016). Strategies to enhance the productivity of rainfed offseason maize. In 2016 American Society of Agricultural and Biological Engineers Annual International Meeting, ASABE 2016 (2016 American Society of Agricultural and Biological Engineers Annual International Meeting, ASABE 2016). American Society of Agricultural and Biological Engineers. https://doi.org/10.13031/aim.20162460222