@Article{TavaresFioSeiGarBar:2020:EfStVi,
author = "Tavares, Tiago Rodrigues and Fiorio, Peterson Ricardo and Seixas,
Hugo Tameir{\~a}o and Garcia, Amparo Cisneiros and Barros, Pedro
Paulo da Silva",
affiliation = "{Universidade de S{\~a}o Paulo (USP)} and {Universidade de
S{\~a}o Paulo (USP)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Universidade de S{\~a}o Paulo (USP)} and
{Universidade Federal de Uberl{\^a}ndia (UFU)}",
title = "Effects of storage on vis-NIR-SWIR reflectance spectra of Mombasa
grass leaf samples",
journal = "Ci{\^e}ncia Rural",
year = "2020",
volume = "50",
number = "3",
pages = "e20190587",
keywords = "diffuse reflectance spectroscopy, hyperspectral sensors, forage,
precision agriculture, espectroscopia de reflect{\^a}ncia difusa,
sensores hiperespectrais, forragem, agricultura de
precis{\~a}o.",
abstract = "Vis-NIR-SWIR reflectance spectra of leaf samples, collected in the
laboratory, allow the calibration of predictive models to quantify
their physicochemical attributes in a practical manner and without
producing chemical residues. This technique should enable the
development of management strategies for intensification of
pasture use. However, spectral analysis performed in the
laboratory may be affected by the deterioration of plant material
during transport from the field to the lab, so storage methods are
necessary. This research aimed to evaluate the effects of
different storage methods on the spectral response of Mombasa
grass leaves. Three methods were evaluated: (i) artificially
refrigerated environment, (ii) humid environment, and (iii)
without microenvironment control. These methods were tested in
five different storage times: 2 hours, 4 hours, 8 hours, 24 hours
and 48 hours. The spectral behavior of the leaves still inserted
in the plant was used as a quality reference. Results showed
notable changes at the earliest storage time for the treatment
without microenvironment control. Both methods with
microenvironment control stabilized the occurrence of spectral
changes over 48 hours of the samples storage, thus both were
suggested for this species. RESUMO: Espectros de reflect{\^a}ncia
vis-NIR-SWIR de amostras foliares, coletados em laborat{\'o}rio,
permitem a calibra{\c{c}}{\~a}o de modelos preditivos para
quantifica{\c{c}}{\~a}o de seus atributos
f{\'{\i}}sico-qu{\'{\i}}micos de maneira pr{\'a}tica e sem
produ{\c{c}}{\~a}o de res{\'{\i}}duos qu{\'{\i}}micos. Esta
t{\'e}cnica permite o desenvolvimento de estrat{\'e}gias de
manejo para a intensifica{\c{c}}{\~a}o do uso de pastagens.
Contudo, an{\'a}lises espectrais realizadas em laborat{\'o}rio
podem ser afetadas pela deteriora{\c{c}}{\~a}o do material
vegetal durante o transporte do campo ao laborat{\'o}rio,
fazendo-se necess{\'a}rio a utiliza{\c{c}}{\~a}o de
m{\'e}todos de armazenamento. O presente trabalho objetivou
avaliar o efeito de diferentes m{\'e}todos de armazenamento na
resposta espectral de folhas de capim Momba{\c{c}}a. Avaliou-se
tr{\^e}s m{\'e}todos: (i) ambiente refrigerado artificialmente;
(ii) ambiente {\'u}mido; e (iii) ao ar livre, sem controle do
microambiente; assim como, cinco diferentes tempos de
armazenamento: 2 horas, 4 horas, 8 horas, 24 horas e 48 horas. O
comportamento espectral das folhas ainda inseridas na planta foi
utilizado como refer{\^e}ncia de qualidade. Os resultados
mostraram altera{\c{c}}{\~o}es pronunciadas para o armazenamento
ao ar livre j{\'a} nos primeiros intervalos de tempo. Ambos
m{\'e}todos com controle de microambiente permitiram estabilizar
a ocorr{\^e}ncia de altera{\c{c}}{\~o}es espectrais ao longo
das 48h de armazenamento das amostras, sendo ambos sugeridos para
esta esp{\'e}cie.",
doi = "10.1590/0103-8478cr20190587",
url = "http://dx.doi.org/10.1590/0103-8478cr20190587",
issn = "0103-8478",
language = "en",
targetfile = "tavares_effects.pdf",
urlaccessdate = "27 abr. 2024"
}