Mostrar registro simples

dc.contributor.authorSchirmbeck, Lucimara Wolfarthpt_BR
dc.contributor.authorFontana, Denise Cybispt_BR
dc.contributor.authorSchirmbeck, Julianopt_BR
dc.date.accessioned2018-12-07T02:49:57Zpt_BR
dc.date.issued2017pt_BR
dc.identifier.issn0006-8705pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/186044pt_BR
dc.description.abstractThe most southern Brazilian state, Rio Grande do Sul, is characterized by high crop yield and is, currently, the third leading soybean producer in the country. Therefore, agriculture is very important to the economy of the region. Because agriculture is highly dependent on variable weather parameters, the present study aimed to test the Temperature-Vegetation Dryness Index (TVDI) as a regional indicator of water status under the climate and soybean crop management conditions that predominate in northwestern Rio Grande do Sul. For this, soybean crop seasons with contrasting yields were selected: 2004 – 2005 (yield 0.5 t·ha–1) and 2009 – 2010 (2.7 t·ha–1). TVDI was obtained from the surface temperature (TS) and Normalized Difference Vegetation Index (NDVI) images available from MODIS products, which were correlated to obtain a triangular scatter plot. Rainfall data from surface weather stations were also used. The results showed that the pattern of the TVDI is associated with rainfall variability. However, as the TVDI is based on normalization of the wet and dry edges of each image individually, the comparison of TVDI values across different images is challenging. This deficiency can be mitigated by analysis of the parameters used to derive the index. Therefore, both the TVDI and the “b” and TSmin parameters used to derive it can elucidate the patterns of crop response to water availability.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofBragantia, Campinas. Vol. 76, n. 3, (jul./set. 2017), p. 447-455pt_BR
dc.rightsOpen Accessen
dc.subjectÍndice de vegetaçãopt_BR
dc.subjectWater statusen
dc.subjectSojapt_BR
dc.subjectNDVIen
dc.subjectClimapt_BR
dc.subjectSurface temperatureen
dc.titleTVDI spatiotemporal pattern of a soybean growing area in humid subtropical climatept_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001080080pt_BR
dc.type.originNacionalpt_BR


Thumbnail
   

Este item está licenciado na Creative Commons License

Mostrar registro simples