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ALTERATIONS ON THE EVAPOTRANSPIRATION OF SUGARCANE CULTIVARS UNDER DISTINCT SALINITY LEVELS APPLIED IN THE FERTIGATION REA
Toledo,João V.; Zolnier,Sérgio; Silva,Thieres G. F. da; Boehringer,Davi; Steidle Neto,Antonio J..
ABSTRACT: The aim of this research was to evaluate the effect of distinct levels of salinity on the evapotranspiration of the RB867515, RB855453, RB92579 and RB928064 sugarcane cultivars. The evapotranspiration was monitored during daytime period under meteorological conditions influenced, mainly by cloud variations. The salinity values were established by addition of 0, 50, 100 and 150 mM of Sodium Chloride (NaCl) to the nutrient solution, which was applied by fertigation, in such way that the electrical conductivity (EC) of the leached solution was near 3, 6, 10 and 13 dS m−1, respectively. The increase of the NaCl concentration in the nutrient solution affected, significantly and in a linear manner, the evapotranspiration of all sugarcane cultivars,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Efficient water use; Saccharum officinarum; Saline stress; Salinization.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000500940
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Development and validation of a data logger for thermal characterization in laying hen facilities AGRIAMBI
Freitas,Letícia C. da S. R.; Tinôco,Ilda de F. F.; Gates,Richard S.; Barbari,Matteo; Cândido,Márcia G. L.; Toledo,João V..
ABSTRACT The environmental monitoring in animal facilities that includes collected data storage in a robust, practical and feasible way is a constant challenge. The aim of this study was to develop a reliable data logger for monitoring the air temperature and air relative humidity of aviaries and to assess the adequacy of the design using commercially available reference standard instruments. The experimental data logger was installed together with a commercial data logger, a mercury thermometer and a calibrated Vaisala HMP110 air relative humidity probe in a meteorological shelter. Linear regression analysis was performed with the collected air temperature and air relative humidity to develop calibration equations. The Nash-Sutcliffe Index and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Electronic device; Environmental monitoring; Poultry facilities.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001000787
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