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| Santos,Célia S. dos; Montenegro,Abelardo A. de A.; Santos,Márcio A. L. dos; Pedrosa,Elvira M. R.. |
| ABSTRACT Efficient water use in agriculture is fundamental, especially in semi-arid regions where water scarcity is intense. The aim of this study was to estimate water requirements and crop coefficients in the different phenological stages of Moringa oleifera. The experiment was carried out from February to April 2015 at the Experimental Unit for Reuse and Hydrological Management, located in Mutuca, PE (7º 15’ 18’’ S, 35º 52’’ 40’’ W, 550 m). A lysimeter was used to estimate crop evapotranspiration. Reference evapotranspiration (ETo) was estimated by indirect methods. In the lysimeter, soil salinity and leaf water potential of the crop were monitored. The direct and indirect methods presented an excellent performance compared with the standard... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigation management; Water requirement; Perennial oilseed crop. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001200840 |
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| Cavalcante,Valéria S.; Santos,Valdevan R.; Santos Neto,Antônio L. dos; Santos,Márcio A. L. dos; Santos,Cícero G. dos; Costa,Leonardo C.. |
| RESUMO Com o objetivo de avaliar a biomassa e a extração de nutrientes por plantas de cobertura no Agreste de Alagoas, implantou-se um experimento no campo experimental da Universidade Federal de Alagoas - Campus Arapiraca. O delineamento experimental adotado foi em blocos casualizados, com oito tratamentos e quatro repetições. Os tratamentos foram: Crotalaria juncea, Crotalaria spectabilis, Cajanus cajan (L.) Millsp., Cajanus cajan, Canavalia ensiforme, Dolichos lablab, Mucuna aterrima e a vegetação espontânea local (testemunha). A matéria verde foi avaliada em uma área de 1 m2 no florescimento de cada espécie sendo, em seguida, a biomassa secada em estufa a 65 ºC até atingir massa constante para obter a matéria seca, em que foram extraídos os teores de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adubação verde; Leguminosas; Macronutrientes; Micronutrientes. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662012000500008 |
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| Santos,Daniella P. dos; Santos,Célia S. dos; Silva,Leiliane M. da; Santos,Márcio A. L. dos; Santos,Cícero G. dos. |
| ABSTRACT Optimization of water use in agriculture is fundamental, particularly in regions where water scarcity is intense, requiring the adoption of technologies that promote increased irrigation efficiency. The objective of this study was to evaluate evapotranspiration models and to estimate the crop coefficients of beet grown in a drainage lysimeter in the Agreste region of Alagoas. The experiment was conducted at the Campus of the Federal University of Alagoas - UFAL, in the municipality of Arapiraca, AL, between March and April 2014. Crop evapotranspiration (ETc) was estimated in drainage lysimeters and reference evapotranspiration (ETo) by Penman-Monteith-FAO 56 and Hargreaves-Samani methods. The Hargreaves-Samani method presented a good performance... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lysimetry; Irrigation management; Beta vulgaris L.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000300189 |
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