Concentração de nitrato no perfil do solo fertigado com diferentes concentrações de fontes nitrogenadas

Coelho, E. F.; Costa, F. da S.; Silva, Ana C. P. da; Carvalho, Gian C.

doi:10.1590/s1415-43662014000300004

Cited by 15 publications

(13 citation statements)

References 11 publications

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“…The NO 3 − concentrations in the soil solution, determined by extraction in porous cups, increased with N rates applied by fertigation (Figure 1), in agreement with Coelho et al (2014). These authors observed that urea induced a 100 % increase in nitrate concentration to a depth of 0.60 m, whereas potassium nitrate resulted in an increase of 169 %.…”

Section: Resultssupporting

confidence: 82%

“…The presence of nitrate in the soil solution depends on the chemical properties of the soil, the N source, the amount applied, and the concentration of N fertilizer in the irrigation water (Coelho et al, 2014). However, Andrade et al (2009) pointed out that some factors inherent to soil physical properties, agricultural practices, and water management can maximize NO − 3 leaching and cause groundwater contamination.…”

Section: Introductionmentioning

confidence: 99%

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Organic and Nitrogen Fertilization of Soil under ‘Syrah’ Grapevine: Effects on Soil Chemical Properties and Nitrate Concentration

Silva

Bassoi

Rocha

et al. 2016

Rev. Bras. Ciênc. Solo

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ABSTRACT:Viticulture is an activity of great social and economic importance in the lower-middle region of the São Francisco River valley in northeastern Brazil. In this region, the fertility of soils under vineyards is generally poor. To assess the effects of organic and nitrogen fertilization on chemical properties and nitrate concentrations in an Argissolo Vermelho-Amarelo (Typic Plinthustalf), a field experiment was carried out in Petrolina, Pernambuco, on Syrah grapevines. Treatments consisted of two rates of organic fertilizer (0 and 30 m 3 ha -1) and five N rates (0, 10, 20, 40, and 80 kg ha), in a randomized block design arranged in split plots, with five replications. The organic fertilizer levels represented the main plots and the N levels, the subplots. The source of N was urea and the source of organic fertilizer was goat manure. Irrigation was applied through a drip system and N by fertigation. At the end of the third growing season, soil chemical properties were determined and nitrate concentration in the soil solution (extracted by porous cups) was determined. Organic fertilization increased organic matter, pH, EC, P, K, Ca, Mg, Mn, sum of bases, base saturation, and CEC, but decreased exchangeable Cu concentration in the soil by complexation of Cu in the organic matter. Organic fertilization raised the nitrate concentration in the 0.20-0.40 m soil layer, making it leachable. Nitrate concentration in the soil increased as N rates increased, up to more than 300 mg kg -1 in soil and nearly 800 mg L -1 in the soil solution, becoming prone to leaching losses.

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Section: Resultssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Organic and Nitrogen Fertilization of Soil under ‘Syrah’ Grapevine: Effects on Soil Chemical Properties and Nitrate Concentration

Silva

Bassoi

Rocha

et al. 2016

Rev. Bras. Ciênc. Solo

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“…The solution samples were analyzed in kits of quick read "Horiba Card" for reading nitrate content. The kit was initially calibrated using solutions of known concentrations, presenting reliability of using, as COELHO et al (2014) (Figure 1). FIGURE 1.…”

Section: Methodsmentioning

confidence: 99%

Concentration of injetion solution and its effects on soil and on yield of fertirrigated banana cv. Terra Maranhão

Coelho

Neto²,

Barros

2014

Eng. Agríc.

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ABSTRACT:The Fertigation is the combined application of water and nutrients to a crop. It can be adapted to all types of agricultural crops. The objective of this study was to evaluate the effect of urea concentration in irrigation water on electrical conductivity of the soil solution and saturation extract along the first cycle of banana cv. Terra Maranhão. The experiment followed a completely randomized design with six treatments and ten replications. Treatments regarded for using three urea concentrations (1.0; 2.5 and 4.0 g L -1 ) in irrigation water applied by two micro irrigation systems (microsprinkler and drip). Results showed that there was a linear elevation of electrical conductivity of saturation extract and soil solution with the increase on concentration of urea in the injection solution. Urea should be used under concentrations up to 2.5 g L -1 in irrigation water without causing increase on electric conductivity of soil solution and saturation extract, considering 1.1 dS m -1 as the tolerated value for the crop. Nitrate in the soil solution increased significantly with the increase of urea concentration in the injection solution. The maximum concentration of nitrate in the soil occurred for 4,0 g L -1 concentration of the injection solution.KEYWORDS: urea, salinity, fertirrigation. CONCENTRAÇÕES DA SOLUÇÃO DE INJEÇÃO E SEUS EFEITOS NO SOLO E NA PRODUTIVIDADE DA BANANEIRA-DA-TERRA MARANHÃO FERTIRRIGADA RESUMO:A fertirrigação é a aplicação combinada de água e nutrientes para a cultura. Ela pode ser adaptada a todos os tipos de culturas agrícolas. Objetivou-se pelo presente estudo avaliar o efeito da concentração de ureia na água de irrigação sobre a condutividade elétrica da solução do solo e do extrato de saturação ao longo do primeiro ciclo da cultura da bananeira-da-terramaranhão. O experimento seguiu um delineamento inteiramente casualizado, com seis tratamentos e dez repetições. Os tratamentos consistiram no uso de três concentrações (1,0; 2,5 e 4,0 g L -1 ) de ureia, aplicadas via gotejamento e microaspersão. Os resultados demonstraram uma tendência linear de elevação da condutividade elétrica do extrato de saturação e da solução do solo com o aumento da concentração da ureia na solução de injeção. A ureia pode ser usada em concentrações de até 2,5 g L -1 na água de irrigação sem causar elevações na condutividade elétrica da solução do solo e do extrato de saturação acima do valor considerado adequado à cultura de 1,1 dS m -1 . À medida que se aumentou a concentração da solução de injeção, aumentou significativamente o teor de NO 3 -no solo, com máximos para concentrações de 4,0 g L -1. PALAVRAS-CHAVE: ureia, salinidade, fertirrigação.

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“…Diferentemente da solução do solo, o nitrogênio pode ser determinado diretamente no campo sem a necessidade de cuidados prévios (COELHO et al, 2014). A concentração de amônio (N -NH 4 ) na solução do solo aumentou de acordo com as doses de N, P 2 O 5 e K 2 O aplicadas; no entanto, o nitrato (N-NO 3 ) apresentou ajuste quadrático em função dos tratamentos.…”

Section: Nitrogênio Na Solução Do Solounclassified

Nutrientes no solo e na solução do solo na citricultura fertirrigada por gotejamento

et al. 2015

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RESUMO:A análise da solução do solo vem mostrando-se um método promissor de diagnóstico da fertilidade de solo, principalmente em sistemas de fertirrigação. O objetivo deste estudo foi avaliar o comportamento dos nutrientes no solo e na solução do solo, quando fornecidas cinco doses de N, P 2 O 5 e K 2 O (0; 25; 50; 100 e 200% da dose recomendada) via fertirrigação. O experimento foi conduzido por três safras em laranjeiras Valência enxertadas sobre citrumelo Swingle. O solo e a solução do solo foram coletados ao final do período de fertirrigação de cada safra. As doses de N, P 2 O 5 e K 2 O aplicadas proporcionaram redução nos valores de pH do solo e da solução do solo, porém a variação dos valores de pH da solução do solo foi 3,5 vezes maior que a observada no solo. Para o P, esta variação ficou em torno de 65 vezes e, para o K, foi maior que 100 vezes. Os teores de P e K apresentaram comportamento semelhante no solo e na solução do solo, com valores de correlação de 0,87 e 0,97, respectivamente, e ambos os teores de P e K aumentaram em função das doses de fertilizantes. Os resultados sugerem que a análise da solução do solo pode ser utilizada como ferramenta para estimar os valores de pH, P, K, Mn e Zn no solo, e também para determinar a disponibilidade de nitrogênio em sistemas de fertirrigação na citricultura. PALAVRAS-CHAVE:Citrus sinensis, extrator de solução do solo, fertilidade do solo. SOIL AND SOIL SOLUTION NUTRIENT CONTENT IN DRIP FERTIGATED CITRUSABSTRACT: Soil solution analysis has shown to be a promising method for soil fertility diagnosis, mainly in fertigation systems. The objective of this study was to evaluate the behavior of nutrients in soil and soil solution by supplying five doses of N, P 2 O 5 and K 2 O (0, 25, 50, 100 and 200% of the recommended dose) via fertigation. The experiment was conducted during three seasons in "Valencia" sweet orange on Swingle rootstock. Soil and soil solution samples were collected after fertigation at each season. The supplied doses of N, P 2 O 5 and K 2 O decreased pH in both soil and soil solution; however soil solution variation was 3.5 times higher. Such differences were also observed for P and K contents, which were 65 times and above 100 times higher than in soil, respectively. These nutrients had similar behavior in both environments with correlation values of 0.87 and 0.97 respectively, and both values of P and K increased according to fertilizer dose. The results suggested that soil solution analysis can be used as a tool to estimate values of pH, P, K, Mn and Zn in the soil, as well as to determine nitrogen availability in citrus production under fertigation systems.

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Concentração de nitrato no perfil do solo fertigado com diferentes concentrações de fontes nitrogenadas

Cited by 15 publications

References 11 publications

Organic and Nitrogen Fertilization of Soil under ‘Syrah’ Grapevine: Effects on Soil Chemical Properties and Nitrate Concentration

Organic and Nitrogen Fertilization of Soil under ‘Syrah’ Grapevine: Effects on Soil Chemical Properties and Nitrate Concentration

Concentration of injetion solution and its effects on soil and on yield of fertirrigated banana cv. Terra Maranhão

Nutrientes no solo e na solução do solo na citricultura fertirrigada por gotejamento

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