Índices de crescimento da cana-de-açúcar irrigada e de sequeiro no Estado da Paraíba

Farias, Carlos Henrique de Azevedo; Fernandes, Pedro Dantas; Azevedo, Hamilton Medeiros de; Neto, José Dantas

doi:10.1590/s1415-43662008000400004

Cited by 79 publications

(75 citation statements)

References 8 publications

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“…On that same layer, T50% treatment had the lowest mean observed, concentrating 76.43% of total roots (Figure 4). The absence of irrigation with treatment TWI stimulated deep root growth and further development side, especially in the layer from 0.00 to 0.20 m, which ensured the concentration of 80% of the roots depth of 0.00 -0.40 m. Results of cumulative percentage of roots occurred in all treatments are according to Farias et al (2008), in stating that in general, up to 76% of the roots of sugarcane are the first 0.45 m of soil depth. These authors evaluated the development of the root system of sugar cane irrigated and cultivated without irrigation after 280 days of implantation of the experiment, and observed that the sugar cane grown without irrigation in 80% of the dry weight of roots in the first 0, 60 m depth of soil, and when irrigated, that figure increased to 90%.…”

Section: Effective Root Depthmentioning

confidence: 89%

“…This statement is reinforced by Farias et al (2008), reporting that when irrigated plant sugarcane issues quickly root system, however, there is a deepening as pronounced as observed under rainfed conditions, because the roots tend to concentrate in the more humid soil.…”

Section: Root Areamentioning

confidence: 96%

“…According to FARIAS et al (2008) for irrigated and non-irrigated soils, on average, about 85% of the root system of sugarcane is located in the first 0.60m deep.…”

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: Effective Root Depthmentioning

confidence: 89%

Section: Root Areamentioning

confidence: 96%

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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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“…Esta resposta verificada no material mais pobre em P e mais argiloso, não foi evidenciada no PVA, de textura média e com maior disponibilidade inicial do nutriente (Tabela 1 e 2), sugerindo que o método de aplicação assumiria menor importância em solos com elevada disponibilidade de P. Os solos semelhantes ao PVA, com menor fator capacidade, possibilitam melhor aproveitamento do P pelas plantas, quando a água não é fator limitante à produção (Costa et al, 2006;Farias et al, 2008).…”

Section: Figuraunclassified

Disponibilidade de zinco para milho em resposta à localização de fósforo no solo

Muner

Ruíz²,

Venegas³

et al. 2011

Rev. bras. eng. agríc. ambient.

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RESUMOA aplicação de P no solo pode afetar a disponibilidade de Zn para as plantas, dependendo de sua localização. Com o objetivo de avaliar a resposta de milho à adição de Zn no solo e determinar seu nível crítico no solo e na planta, em relação à localização de P, em amostras de dois solos de Minas Gerais, realizou-se um ensaio em casa de vegetação. O experimento consistiu em um arranjo fatorial (2 x 3 x 6), correspondendo a dois solos (Latossolo Vermelho Amarelo variação Una e Argissolo Vermelho Amarelo, doravante denominados LU e PVA, respectivamente); três modos de localização de P (5, 10 e 30% do volume total do solo na dose de 200 mg dm -3 ) e seis doses de Zn (0, 1, 2, 4, 6 e 8 mg dm -3 ). Determinaramse a produção de matéria seca e os teores de Zn na parte aérea das plantas de milho. A adição de Zn aumentou linearmente (p < 0,01) o teor do elemento no solo e a absorção pela planta. No solo LU os níveis críticos variaram de 0,91 a 2,13 mg dm -3 de Zn pelo extrator Mehlich-1 e, na planta, de 18,0 a 24,6 mg kg -1 . Esses níveis foram maiores quando as aplicações de P foram localizadas em menor volume de solo. A localização de P afetou o teor de Zn na Planta. No solo LU, quando o P foi localizado no menor volume de solo e na ausência de Zn, as plantas de milho apresentaram elevados teores de P.Palavras-chave: nível crítico de Zn, forma de aplicação de P, interação Zn/P Availability of zinc to corn in response to liming and added phosphorus placement in soil ABSTRACT The soil P application can affect Zn availability to plants, depending on the application. The objective of this study was to evaluate corn (Zea mays L.) response to zinc (Zn) addition to the soil and to determine its critical level in the soil and in the plant, in relation to added phosphorus (P) placement, using two soil samples from Minas Gerais, Brazil, in a greenhouse experiment. The experiment was conducted in a factorial arrangement (2 x 3 x 6), with two soils [Red Yellow Latosol of the Una Variation (Oxisol) and RedYellow Podzolic (Ultisol), named LU and PVA, respectively]; three forms of added P placement (5, 10 and 30% of the total volume of soil in a dosage of 200 mg dm -3 ), and six Zn dosages (0, 1, 2, 4, 6 and 8 mg dm -3 ). The dry matter production and the contents of Zn in the aerial part of the corn plants were determined. The addition of Zn linearly increased (p < 0.01) its content in the soil and plant uptake. The critical levels for the LU soil ranged from 0.91 to 2.13 mg dm -3 of Zn as determined by the Mehlich-1 extractor and plant levels ranged from 18.0 to 24.6 mg kg -1 . These levels were higher when P was placed in smaller soil volumes. P placement affected the Zn content in the plant. In LU soil, when P was placed at the smallest soil volume and Zn privation, the corn plants presented elevated P levels.

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“…However, it is known that the damage promoted by stress depends on which developmental phase the plant is and the stress duration. The longer the period with low water availability, the greater the damage on stalks and saccharose yield (Inman-Bamber 2004, Farias et al 2008.…”

Section: Abstract Resumomentioning

confidence: 99%

Adjustment of water-crop production models for ratoon sugarcane

Souza

Gerstemberger

Gurski

et al. 2015

Pesqui. Agropecu. Trop.

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Production models need to be tested at different locations to be used as an agricultural planning tool. Hydric relations and performances of water-crop production models were used to estimate ratoon sugarcane yield along nine production cycles, in Paranavaí, Paraná State, Brazil. The crop reference and real evapotranspiration, soil water storage, water deficit and surplus were evaluated. The "Stewart" and "Jensen" models showed the best performance to estimate ratoon sugarcane yield. Water availability in the first development phase of ratoon sugarcane has the greatest influence on yield.

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Índices de crescimento da cana-de-açúcar irrigada e de sequeiro no Estado da Paraíba

Cited by 79 publications

References 8 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

Disponibilidade de zinco para milho em resposta à localização de fósforo no solo

Adjustment of water-crop production models for ratoon sugarcane

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