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| Pinto,Daniele Gutterres; Fontana,Denise Cybis; Dalmago,Genei Antonio; Fochesatto,Elizandro; Vicari,Matheus Boni; Bremm,Carolina; Cunha,Gilberto Rocca da; Gouvêa,Jorge Alberto de; Santi,Anderson. |
| Abstract: The objective of this work was to identify the spectral bands, vegetation indices, and periods of the canola crop season in which the correlation between spectral data and biophysical indicators (total shoot dry matter and grain yield) is most significant. The experiment was carried out during the 2013 and 2014 crop seasons at Embrapa Trigo, in the state of Rio Grande do Sul, Brazil. A randomized complete block design was used, with four replicates, and the treatments consisted of five doses of nitrogen topdressing. Plant dry matter, grain yield, and phenology were measured. The canola spectral response was evaluated by measuring the canola canopy reflectance using a spectroradiometer, and, with this data, the SR, NDVI, EVI, SAVI, and GNDVI... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brassica napus; EVI; GNDVI; NDVI; SAVI; Spectroradiometry. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001000825 |
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| Pinto,Daniele Gutterres; Fontana,Denise Cybis; Dalmago,Genei Antonio; Cunha,Gilberto Rocca da; Fochesato,Elizandro; Vicari,Matheus Boni; Gouvêa,Jorge Alberto de; Santi,Anderson. |
| ABSTRACT: The objective of this study was to characterize the variability of spectral reflectance and temporal profiles of vegetation indices associated with nitrogen fertilization, crop cycle periods, and weather conditions of the growing season in canola canopies in southern Brazil. An experiment was carried out during the 2013 and 2014 canola growing seasons at EMBRAPA Trigo, Passo Fundo, state of Rio Grande do Sul, Brazil. The experiment was conducted in a randomized block design with four replications. Five doses of nitrogen top dressing were used as treatments: 10, 20, 40, 80, and 160kg ha-1. Measurements were obtained with the spectroradiometer positioned above the canopy, to construct spectral reflectance curves for canola and establish temporal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Spectroradiometry; Nitrogen fertilization; Brassica napus. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000100200 |
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| Fochesatto,Elizandro; Nied,Astor Henrique; Bergamaschi,Homero; Dalmago,Genei Antonio; Pinto,Daniele Gutterres; Kovaleski,Samuel; Cunha,Gilberto Roca da; Gouvea,Jorge Alberto. |
| ABSTRACT: The objective of this study was to adjust parameters related to the interception of photosynthetically active radiation (PAR) by reproductive structures of spring canola, with different nitrogen levels and hybrids. Two field experiments were conducted, being one with different sowing dates and hybrids (Hyola 61 and Hyola 432) and another with doses of 10, 20, 40, 80, 160kg ha-1 of N, applied in top dressing. They were conducted in Passo Fundo and Coxilha, RS, Brazil, in 2011 and 2014, respectively.The evaluated variables were: area index of reproductive structures, interception efficiency and extinction coefficient of these structures for PAR. PAR interception increased by increasing the reproductive structures volume. Interception efficiency of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brassica napus; Interception efficiency; Extinction coefficient; Silique. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001001790 |
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