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| Siqueira,Glecio M.; Silva,Jucicléia S. da; Bezerra,Joel M.; Silva,Ênio F. de F. e; Dafonte,Jorge Dafonte; Melo,Ralini F. de. |
| A hipótese intrínseca é, normalmente, a mais utilizada por ser menos restritiva; quando comparada com as demais hipóteses da geoestatística exige apenas a existência de estacionariedade do semivariograma, sem nenhuma restrição quanto à existência de variância finita. O objetivo deste trabalho foi avaliar a estacionariedade de dados de umidade em um Espodossolo Humilúvico. Os dados foram coletados em um transeto contendo 128 pontos, espaçados a cada 3 m. O conteúdo de água no solo foi determinado nas camadas de 0,0-0,2 m, 0,2-0,4 m e 0,4-0,6 m. A análise estatística demonstrou que os dados apresentaram distribuição de frequência lognormal. Os valores de umidade variaram com as variações de relevo. Houve estacionariedade do semivariograma para as três... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Geoestatística; Física do solo; Amostragem do solo. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015000500439 |
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| Almeida,Willian F. de; Paz,Vital P. da S.; Jesus,Ana P. C. de; Silva,Jucicléia S. da; Gonçalves,Karoline S.; Oliveira,Andressa S. de. |
| ABSTRACT In view of the imminent need for efficient water use and the search for adequate management techniques to reduce the effect of salinity on plants, a study was conducted to evaluate the effect of continuous and pulses drip irrigation with saline water on green bean yield and water use efficiency. The experiment was conducted in a greenhouse, in a completely randomized design, with treatments distributed in a 2 x 5 factorial arrangement. The first factor was type of drip irrigation, i.e., continuous or pulse, while the second factor was the levels of water salinity (electrical conductivity of 0.3, 1.5, 2.5, 3.5 and 4.5 dS m-1), with five replicates, and two plants per replicate, totaling 50 experimental units. The following variables were analysed:... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris; Pot; Greenhouse; Water use efficiency. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000700476 |
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| Lira,Raquele M. de; Silva,Ênio F. de F. e; Simões Neto,Djalma E.; Santos Júnior,José A.; Lima,Breno L. de C.; Silva,Jucicléia S. da. |
| ABSTRACT The objective was to evaluate the growth and yield of sugarcane irrigated with brackish water and leaching fractions. A completely randomized experimental design was used, in a 5 x 2 factorial scheme, with four replicates. The treatments consisted of five irrigation water salinity levels (0.5, 2.0, 3.5, 5.0 and 6.5 dS m-1) and two leaching fractions (0 and 0.17), corresponding to 100 and 120% of the crop evapotranspiration. The irrigation management was performed daily. Irrigation water salinity levels were obtained by adding NaCl and CaCl2 to the public-supply water, in order to obtain a molar ratio between Na:Ca of 1:1. The following measurements were taken: height and stem diameter; number of tillers; number of leaves and leaf area with monthly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp.; Salt management; Irrigation; Lysimeters. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000300170 |
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