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| Carvalho,Ailton A. de; Montenegro,Abelardo A. de A.; Silva,Hernande P. da; Lopes,Iug; Morais,José E. F. de; Silva,Thieres G. F. da. |
| ABSTRACT For climate change scenarios, there is a high degree of complexity, with impacts on the future availability of water resources. In this context, studies related to changes in rainfall time series are essential in order to identify environmental vulnerability. The objective of this study was to analyze trends in the rainfall regime, number of rainy days and temperature for stations located at different continentality and altitude conditions in Northeast Brazil. Meteorological data of the Instituto Nacional de Meteorologia were used, being classified according to the location in relation to the continent: coastal strip (14 stations), strip of 150-300 km up to 300 m altitude (14 stations) and above 300 m (five stations), between 400 and 600 km from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Continentality; Rainfall modeling; Climate variability. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000100015 |
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| Barbosa,Marcela L.; Silva,Thieres G. F. da; Zolnier,Sérgio; Silva,Servulo M. S. e; Morais,José E. F. de; Assis,Mery C. de S.. |
| ABSTRACT This study aimed to understand the relationship of morphological characteristics and actual evapotranspiration of forage cactus clones with their productive capacity under different water regimes. The data used in this study were collected between the years 2012 and 2013, in Serra Talhada, State of Pernambuco. The clones Sertânia IPA - IPA, Miúda - MIU and Orelha de Elefante Mexicana - OEM were submitted to three irrigation depths (2.5, 5.0 and 7.5 mm) and three irrigation intervals (7, 14 and 28 days). Cladode and plant morphology, accumulated actual evapotranspiration and yield were obtained at the moment of harvest. Pearson’s correlation matrix was elaborated and, in the sequence, multicollinearity, canonical and path analysis were applied.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Evapotranspiration; Nopalea sp.; Opuntia sp.; Brazilian Semi-arid region. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000900600 |
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| Lira,Raquele M. de; Gordin,Leandro C.; Silva,Ênio F. de F. e; Silva,Gerônimo F. da; Dantas,Daniel da C.; Morais,José E. F. de. |
| ABSTRACT The objective of this study was to evaluate the concentration of cations in the leachate of soil cultivated with sugarcane irrigated with brackish water. An experiment was carried out in drainage lysimeters at the Federal Rural University of Pernambuco, at the Recife campus. The experimental design was completely randomized in a 5 x 2 factorial scheme, with four replicates, corresponding to five levels of electrical conductivity of the irrigation water (ECw) (0.5, 2.0, 3.5, 5.0 and 6.5 dS m-1) and two leaching fractions (LF1 = 0 and LF2 = 0.17) corresponding to water depths equivalent to 100 and 120% of crop evapotranspiration (ETc), by which the irrigations were managed. Electrical conductivity of the drained water was daily monitored and Na, K,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp.; Water salinity; Soluble ions. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000900616 |
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| Morais,José E. F. de; Silva,Thieres G. F. da; Queiroz,Maria G. de; Araújo,Gherman G. L. de; Moura,Magna S. B.; Araújo Júnior,George do N.. |
| ABSTRACT The knowledge on soil water dynamics is the basis of crop water management. The soil water balance (SWB) method is used for this purpose. However, its application in cactus may lead to misinterpretation in water efficiency analysis, since it does not consider the amount of water retained in the plant (WRP). This study aimed to evaluate SWB applicability, hydrodynamic changes and water efficiency of forage cactus clones under irrigation. The clones ‘Orelha de Elefante Mexicana’ (OEM), ‘IPA Sertânia’ (IPA) and ‘Miúda’ (MIU) were submitted to irrigation depths (2.5, 5.0 and 7.5 mm) and frequencies (7, 14 and 28 days), in Serra Talhada, PE, Brazil, between March 2012 and August 2013. The SWB was applied, by adding the WRP in the estimate of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water retained in the plant; Soil water balance; Cactus; Modelling. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000400273 |
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