Use este identificador para citar ou linkar para este item: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569838
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dc.contributor.authorRODRIGUES, L. N.pt_BR
dc.contributor.authorAZEVEDO, J. A. dept_BR
dc.contributor.authorSOCCOL, O. J.pt_BR
dc.contributor.authorSILVA, E. M. dapt_BR
dc.date.accessioned2011-07-08T11:50:11Z-
dc.date.available2011-07-08T11:50:11Z-
dc.date.created2006-11-13pt_BR
dc.date.issued2005pt_BR
dc.identifier.citationPlanaltina, DF: Embrapa Cerrados, 2005.pt_BR
dc.identifier.urihttp://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569838pt_BR
dc.descriptionABSTRACT: Among the several methods used to manage irrigation, the ones based on the calculation of crop water consumption or evapotranspiration are the most common. From those, the one presented by Doorenbos e Pruitt (1977) is the most used. Based on this method, the crop evapotranspiration is calculated multiplying a crop reference evapotranspiration by a crop coefficient. Applying this methodology in some situations is not convenient, for instance, in the estimative of crop water use efficiency. Besides of this, a good estimative of crop coefficient is difficult and should be done for each region, once is site specific. Options to this method are the models that calculate the evaporation and transpiration separately. Among those, the one presented by Ritchie (1972) is the most popular. It was developed to calculate row crop evapotranspiration in situations where neither soil water deficit occur nor crop is in senescence stage. This model has been used successfully to estimate crop evapotranspiration under different climatic, soil and crop conditions. To use this model it is necessary to estimate two soil parameters. Even though the methodology to estimate these two parameters is of easy application. It is not widely known. The objectives of this paper were: i) to describe the Ritchie model and apply it to calculate the evapotranspiration of Cerrados' crop; and ii) to present methodologies to estimate both its soil parameter and the crop leaf are index.pt_BR
dc.language.isoporpt_BR
dc.relation.ispartofseries(Embrapa Cerrados. Documentos, 133).pt_BR
dc.rightsopenAccesspt_BR
dc.subjectCoeficiente de culturapt_BR
dc.titleModelo de Ritchie: descrição e aplicação.pt_BR
dc.typeFolhetospt_BR
dc.date.updated2011-07-08T11:50:11Zpt_BR
dc.subject.thesagroEvapotranspiraçãopt_BR
dc.subject.thesagroIrrigaçãopt_BR
dc.subject.thesagroManejo de Águapt_BR
dc.subject.nalthesaurusevapotranspirationpt_BR
dc.subject.nalthesauruscrop coefficientpt_BR
dc.subject.nalthesaurusirrigationpt_BR
dc.subject.nalthesauruswater managementpt_BR
dc.format.extent229 p.pt_BR
riaa.ainfo.id569838pt_BR
riaa.ainfo.lastupdate2009-10-23pt_BR
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