Distribuição de água no solo aplicado por gotejamento enterrado e superficial

Barros, Allan Cunha; Folegatti, Marcos Vinícius; Souza, Claudinei Fonseca; Santoro, Bruno de Lima

doi:10.1590/s1415-43662009000600006

Cited by 14 publications

(17 citation statements)

References 18 publications

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“…The N-NH 4 + and NNO 3 -present in the DSE showed concentrations of 26.33 and 0.07 mg L -1 , values considered above and within, respectively, the limits allowed for use in irrigation (FAO, 1973). The concentration of P-PO 4 -, was 2.53 mg L-1 and K + showed a value close to the effluent used for GALAVI et al (2010), which was 22.62 mg L -1 . The concentrations of Ca 2 + and Mg 2 + recorded values of 14.15 and 4.97 mg L -1 , lower than that observed for KALAVROUZIOTIS et al (2008), when using DSE, with concentrations of 90.74 and 21.63 mg L -1 , respectively.…”

Section: Methodssupporting

confidence: 63%

“…BUSO et al (2009) also observed a decrease in root length as to increase the depth in the soil profile. SANTOS (2010) states that subsurface drip irrigation provides a more homogeneous distribution of roots in the profile, different cultivation without irrigation where there is a predominance of roots in the first layer.…”

Section: Root Lengthmentioning

confidence: 99%

“…This system is characterized by its high efficiency in the application of water and nutrients, and the reduction of water losses by evaporation and percolation (BARROS et al, 2009;BARROS et al, 2010;RIBEIRO et al, 2010), once the water and nutrition supply is performed directly or near the root zone of plants.…”

Section: Introductionmentioning

confidence: 99%

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Root system distribution of sugarcane irrigated with domestic sewage effluent aplication by subsurface drip system

Sousa¹,

Matsura

Elaiuy³

et al. 2013

Eng. Agríc.

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Irrigation with domestic sewage effluent (DSE) has been recommended by subsurface dripping, as it can obtain a high rate of irrigation efficiency and faster use of salts in comparison with other irrigation methods. The study aimed at evaluating the area, the length and the effective depth of the root system of sugarcane irrigated with DSE by subsurface drip system and with different irrigation rates at depths of 0. 00-0.20, 0.20-0.40, 0.40-0.60 and 0.60-0.80m. The experiment was carried out in the municipality of Piracicaba, in the state of São Paulo (SP), Brazil, in a sugarcane area irrigated with DSE in a completely randomized blocks set up in furrows, with three replications and four treatments, which are: one area without irrigation (AWI) and three irrigated areas meeting 50% (T50%), 100% (T100%) and 200% (T200%) of the crop's water need between each round of irrigation. T100% and T200% provided smaller areas and lengths of roots in the two deepest layers, as compared to AWI and T50%, which stimulated the development of deeper roots due to the water stress. TWI, T100% and T200% presented 80% of the roots up to a depth of 0.40m and T50% treatment presented 76.43% of roots total. KEYWORDS:Root; water reuse; subsurface drip. DISTRIBUIÇÃO DO SISTEMA RADICULAR DA CANA-DE-AÇÚCAR IRRIGADA COM EFLUENTE DE ESGOTO DOMÉSTICO POR GOTEJAMENTO SUBSUPERFICIAL RESUMO:A irrigação com efluente de esgoto doméstico (EED) tem sido recomendada para aplicação por gotejamento subsuperficial, podendo-se obter elevados índices de eficiência de irrigação e mais rápido aproveitamento dos sais em comparação com outros métodos de irrigação. O trabalho objetivou avaliar a área de raiz, o comprimento e a profundidade efetiva do sistema radicular da cana-de-açúcar irrigada com EED aplicado por gotejamento subsuperficial e com diferentes lâminas de irrigação, nas camadas de solo de 0,00-0,20; 0,20-0,40; 0,40-0,60 e 0,60-0,80 m. O experimento foi realizado em Piracicaba-SP, numa área de cana-de-açúcar irrigada com EED, em um delineamento de blocos casualizados dispostos no esquema de faixas, com três repetições e quatro tratamentos, sendo estes: uma área sem irrigação (TSI) e três áreas irrigadas, atendendo a 50% (T50%), 100% (T100%) e 200% (T200%) da necessidade hídrica da cultura entre cada turno de rega. O T100% e o T200% proporcionaram menores áreas e comprimento de raízes nas duas camadas mais profundas, quando comparados ao TSI e ao T50%, que devido ao estresse hídrico, proporcionado à cultura, estimularam o desenvolvimento de raízes mais profundas. O TSI, T100% e T200% apresentaram 80% das raízes até 0,40 m e, nessa mesma profundidade, o tratamento T50% apresentou 76,43% do total de raízes.

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Section: Methodssupporting

confidence: 63%

Section: Root Lengthmentioning

confidence: 99%

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Root system distribution of sugarcane irrigated with domestic sewage effluent aplication by subsurface drip system

Sousa¹,

Matsura

Elaiuy³

et al. 2013

Eng. Agríc.

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“…The dimensions of the wet bulb can be measured directly in the field, with open trenches, or by indirect methods, using tables or pre-established models (KELLER & BLIESNER, 1990). However, differences in chemical and physical compositions of Brazilian soils allow indirect methods, adjusted for all soils, are not always adequate, making indispensable specific studies (BARROS et al, 2009). …”

Section: Introductionmentioning

confidence: 99%

Distribution of water in sandy soil applied by drip

Gonçalves¹,

Alves²,

Marques³

et al. 2014

Eng. Agríc.

Self Cite

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The search for the use of water with high levels of efficiency has motivated the use of drip irrigation in several agricultural systems. However, for the efficiency be ensured, it is necessary that the water distribution in the soil profile must to be known in more details. As it is a highly variable process, function of the local characteristics, is essential the study of each case. The objective of this research was evaluating the water distribution in the soil profile, from drippers installed in surface and 0.15 m below the soil surface. The experiment was realized in the Technical Center of Irrigation (TCI) of the State University of Maringá - PR. The water monitoring in the soil profile was done with TDR probes installed in a box containing sandy soil, at the depths from 0.05 to 0.80 m; and 0.05 to 0.35 m of lateral spacing, at intervals of 0.05 m, totalizing 30 probes. The treatments were differentiated in relation of the installation depth of the emitters (0.0 and 0.15 m) and flow (1, 2, 4, 6, and 8 L h-1). The irrigation time was 8 hours continuous with reading of the TDR probes each 30 minutes. The results allowed concluding that the wet area with the emitter positioned on the soil surface was directly proportional to the flow increase. For the underground dripper, this area was substantially smaller and the water losses by percolation were higher, mainly to the flows higher than 4 L h-1, which provided to unacceptable water losses that should be avoided.

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“…Esse fenômeno se deve à diferença entre as constantes dielétricas (K, adimensional), da água, do ar e do solo. Na A TDR tem sido utilizada também para a avaliação da distribuição de solutos no solo (WARD et al, 1995;NADLER et al, 1999;BEJAT et al, 2000;MMOLAWA;SOUZA et al, 2006aSOUZA et al, , 2007BARROS et al, 2009;LOPES et al, 2010;VARALLO et al, 2010;BIZARI et al, 2011BIZARI et al, , 2014. Tal aplicação pode trazer benefícios para a pesquisa em fertirrigação, de forma a fornecer subsídios ao estudo da dinâmica de solutos.…”

Section: Reflectometria No Domínio Do Tempo (Tdr)unclassified

Caracterização do volume de solo molhado em diferentes fases de desenvolvimento da cana-de-açúcar sob gotejamento subsuperficial

Grecco¹

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Distribuição de água no solo aplicado por gotejamento enterrado e superficial

Cited by 14 publications

References 18 publications

Root system distribution of sugarcane irrigated with domestic sewage effluent aplication by subsurface drip system

Root system distribution of sugarcane irrigated with domestic sewage effluent aplication by subsurface drip system

Distribution of water in sandy soil applied by drip

Caracterização do volume de solo molhado em diferentes fases de desenvolvimento da cana-de-açúcar sob gotejamento subsuperficial

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