Impacts of nitrogen management on no-till maize production following forage cover crops

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dc.contributor.authorMomesso, Letusa [UNESP]
dc.contributor.authorCrusciol, Carlos A.C. [UNESP]
dc.contributor.authorSoratto, Rogério P. [UNESP]
dc.contributor.authorVyn, Tony J.
dc.contributor.authorTanaka, Katiuça S. [UNESP]
dc.contributor.authorCosta, Claudio H.M.
dc.contributor.authorNeto, Jayme Ferrari [UNESP]
dc.contributor.authorCantarella, Heitor
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionDep. of Microbial Ecology
dc.contributor.institutionAgronomy Dep
dc.contributor.institutionSoils and Environmental Resources Center
dc.date.accessioned2019-10-06T16:27:50Z
dc.date.available2019-10-06T16:27:50Z
dc.date.issued2019-03-01
dc.description.abstractCrop residue decomposition is slower in no-till (NT) systems, especially in high-biomass systems. Adopting optimum nN management can provide increased soil coverage and synchronize the supply of nutrients with the period of highest crop demand in agroecosystems. A three-year experiment was conducted to assess the feasibility of applying N on forage grass cover crops before termination {Urochloa brizantha (Hochst. Ex A. Rich.) R.D. Webster [syn. Brachiaria brizantha (Hochst. Ex A. Rich) Stapf] and Urochloa ruziziensis (R. Germ. and C.M. Evrard) Crins [syn. B. ruziziensis (R. Germ. and C.M. Evrard)]}, or on forage grass cover crop residues immediately before maize (Zea mays L.) seeding, aiming to supply N to the following maize crop. Urochloa brizantha had 25% higher biomass production and a higher amount of nutrient content than U. ruziziensis. The N application before termination increased biomass production and nutrient content in cover crop residues compared with the conventional fertilization method (30 kg N ha-1 in the maize seeeding plus 170 kg N ha-1 sidedressed in V6 growth stage). Nitrogen applied one day before seeding (DBS) of maize or using conventional method resulted in a higher number of ears per plant and more kernels per ear as well as a higher grain yields of maize (13.8 and 14.1 Mg ha-1, respectively) compared to N applied on cover crops. Our results suggest that, while both forage grass cover crops produced greater amounts of dry matter (DM) and released similar amounts of nutrients, applying all N to cover crops before maize is not a feasible alternative. Nitrogen application 1 DBS could be an alternative management option to supply N to maize because this method resulted in similar nitrogen use efficiency (NUE) as conventional fertilization method.en
dc.description.affiliationSão Paulo State Univ. (UNESP) College of Agricultural Sciences
dc.description.affiliationNetherlands Institute of Ecology Dep. of Microbial Ecology
dc.description.affiliationSão Paulo State Univ. (UNESP) College of Agricultural Sciences Dep. of Crop Science, Av. Universitária, 3780, Lageado Experimental Farm
dc.description.affiliationUniv. Agronomy Dep
dc.description.affiliationFederal Univ. of Goias (UFG) Agronomy Dep
dc.description.affiliationAgronomic Institute of Campinas (IAC) Soils and Environmental Resources Center
dc.description.affiliationUnespSão Paulo State Univ. (UNESP) College of Agricultural Sciences
dc.description.affiliationUnespSão Paulo State Univ. (UNESP) College of Agricultural Sciences Dep. of Crop Science, Av. Universitária, 3780, Lageado Experimental Farm
dc.format.extent639-649
dc.identifierhttp://dx.doi.org/10.2134/agronj2018.03.0201
dc.identifier.citationAgronomy Journal, v. 111, n. 2, p. 639-649, 2019.
dc.identifier.doi10.2134/agronj2018.03.0201
dc.identifier.issn1435-0645
dc.identifier.issn0002-1962
dc.identifier.scopus2-s2.0-85064908166
dc.identifier.urihttp://hdl.handle.net/11449/189039
dc.language.isoeng
dc.relation.ispartofAgronomy Journal
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.titleImpacts of nitrogen management on no-till maize production following forage cover cropsen
dc.typeArtigo
unesp.author.lattes9281484833327774[2]
unesp.author.orcid0000-0003-4673-1071[2]
unesp.departmentProdução e Melhoramento Vegetal - FCApt

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Botucatu - FCA - Faculdade de Ciências Agronômicas