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dc.contributor.authorANTONINI, J. C. dos A.pt_BR
dc.contributor.authorSILVA, E. M. D.pt_BR
dc.contributor.authorGRIEBELER, N. P.pt_BR
dc.contributor.authorSANO, E. E.pt_BR
dc.date.accessioned2011-08-31T11:11:11Zpt_BR
dc.date.available2011-08-31T11:11:11Zpt_BR
dc.date.available2011-08-31T11:11:11Zpt_BR
dc.date.created2011-08-31pt_BR
dc.date.issued2011pt_BR
dc.identifier.citationEngenharia Agrícola, Jaboticabal, v. 31, n. 4, p. 652-662, jul./ago. 2011.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/899346pt_BR
dc.descriptionThe objective of this work was to develop and validate a mathematical model to estimate the duration of cotton (Gossypium hirsutum L. r. latifolium hutch) cycle in the State of Goiás, Brazil, by applying the method of growing degree-days (GD), and considering, simultaneously, its time-space variation. The model was developed as a linear combination of elevation, latitude, longitude, and Fourier series of time variation. The model parameters were adjusted by using multiple-linear regression to the observed GD accumulated with air temperature in the range of 15°C to 40°C. The minimum and maximum temperature records used to calculate the GD were obtained from 21 meteorological stations, considering data varying from 8 to 20 years of observation. The coefficient of determination, resulting from the comparison between the estimated and calculated GD along the year was 0.84. Model validation was done by comparing estimated and measured crop cycle in the period from cotton germination to the stage when 90 percent of bolls were opened in commercial crop fields. Comparative results showed that the model performed very well, as indicated by the Pearson correlation coefficient of 0.90 and Willmott agreement index of 0.94, resulting in a performance index of 0.85.eng
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectGoiáspt_BR
dc.subjectGraus-diapt_BR
dc.subjectSérie de Fourierpt_BR
dc.subjectGrowing degree-dayspt_BR
dc.subjectThermal requirementpt_BR
dc.subjectFourier seriespt_BR
dc.titleSpatio-temporal modelling of the duration of the cotton cycle in the state of Goiás, Brazil.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2013-07-30T11:11:11Zpt_BR
dc.subject.thesagroAlgodãopt_BR
dc.subject.thesagroCerradopt_BR
dc.subject.thesagroModelo Matemáticopt_BR
dc.subject.thesagroTemperaturapt_BR
dc.subject.nalthesaurustemperaturept_BR
riaa.ainfo.id899346pt_BR
riaa.ainfo.lastupdate2013-07-30pt_BR
dc.contributor.institutionJORGE CESAR DOS ANJOS ANTONINI, CPACpt_BR
dc.contributor.institutionEUZEBIO MEDRADO DA SILVA, CPACeng
dc.contributor.institutionNORI P. GRIEBELER, UFGeng
dc.contributor.institutionEDSON EYJI SANO, CPAC.eng
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