Drought and low N status limiting maize production in Brazil.

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dc.contributorCNPMS
dc.contributorANTONIO MARCOS COELHO, CNPMS
dc.contributorPAULO EVARISTO DE O GUIMARAES, CNPMS
dc.contributorSIDNEY NETTO PARENTONI, CNPMS.
dc.creatorSANTOS, M. X.
dc.creatorLOPES, M. A.
dc.creatorCOELHO, A. M.
dc.creatorGUIMARAES, P. E. O.
dc.creatorPARENTONI, S. N.
dc.creatorGAMA, E. E. G.
dc.creatorFRANCA, G. E.
dc.date2011-04-10T11:11:11Z
dc.date2011-04-10T11:11:11Z
dc.date2011-04-10T11:11:11Z
dc.date2011-04-10T11:11:11Z
dc.date1997-11-14
dc.date1997
dc.date2018-06-11T11:11:11Z
dc.date.accessioned2026-07-07T05:05:17Z
dc.descriptionThe Brazilian territory has an area of approximately 8,5 million km2, which is divided into five main regions with particular characteristics related to average climitaic conditions and natural soil fertility. Climatic variations may be very accentuated within each particular region, but a common feature is the irregular distribution of rains, which causes droughts of variable intensities. Maize is an important crop in most Brazilian regions, occupying approximately 13 million ha and producing annually 28-30 million tons of grain. It has been estimated that drought problems, depending on year intensity, reduce maize production by 14% to 28%. Another limiting factor for maize production in Brazil is the low natural fertility of the soils, especially in nutrients like phosphorus and nitrogen (N). It has been estimated that 80% of the soils in Brazil are deficient in N. Although fertilization is a common solution to this problem, its high costs make this option inaccessible to many farmers. The amount of supplemental N applied to maize in Brazil is low (36 kg N/ha), and of this only 50% to 60% is utilized by the crop. Considering that low N availability and drought are severe constraints to maize crop in Brazil, the National Maize and Sorghum Research Center (CNPMS/EMBRAPA) has initiated breeding programs aimed at the development of germplasm that performs more efficienctly under these two limiting conditions. Several genotypes have been developed on the basis of anthesis-silking interval selection (...)
dc.identifierIn: SYMPOSIUM OF DEVELOPPING DROUGHT AND LOW N-TOLERANCE MAIZE, 1996, El Batan, Mexico. Proceedings... El Batan: CIMMYT, 1997. p. 20-23.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/477300
dc.identifier.urihttp://hdl.handle.net/123456789/479898
dc.languageeng
dc.rightsopenAccess
dc.subjectTolerancia
dc.subjectBrasil
dc.subjectMaize
dc.subjectProduction
dc.subjectTolerance
dc.subjectFertility
dc.subjectFertilidade
dc.subjectMilho
dc.subjectNitrogênio
dc.subjectMelhoramento
dc.subjectProdução
dc.subjectSeca
dc.subjectZea Mays
dc.subjectdrought
dc.subjectbreeding
dc.subjectBrazil
dc.subjectnitrogen
dc.subjectsoil
dc.titleDrought and low N status limiting maize production in Brazil.
dc.typeArtigo em anais e proceedings

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