Influência de métodos de digestão e massa de amostra na recuperação de nutrientes em resíduos orgânicos

“…Para Melo & Silva (2008) os resíduos de origem animal apresentam ampla faixa de teores de nutrientes expressos na base da MS: N (11-54 g kg ) e Cu (15-1.388 mg kg -1 ). Os valores de pH e de condutividade elétrica (CE) admitidos para resíduos orgânicos que servirão de fertilizantes agrícolas estão na faixa de 6-8,5 e 0,64-6,85 ds m -1 , respectivamente .…”

Section: Figura 1 Rúmen Bovino Com Conteúdo Ruminal Após O Abate Do unclassified

“…Os valores de pH e de condutividade elétrica (CE) admitidos para resíduos orgânicos que servirão de fertilizantes agrícolas estão na faixa de 6-8,5 e 0,64-6,85 ds m -1 , respectivamente . Apenas os teores de K, Mg e Mn (Tabela 1) do RRB seco ou úmido não se encontram dentro das faixas relatadas por Melo & Silva (2008) enquanto os valores da CE e do pH estão adequados para uso agrícola. Evidentemente, é de se esperar que a composição química do RRB varie em função da dieta do animal mas, considerando-se os resultados apresentados na Tabela 1 e uma estimativa de geração de 177,4 milhões de toneladas de RRB em função dos números de animais abatidos no Brasil (IBGE, 2011) este resíduo apresenta um potencial de ciclar cerca de 2.541.720 kg N; 672.600 kg P; 177.000 kg K; 318.600 kg Na; 973.500 kg Ca; 88.500 kg Mg; e 247.88 kg S, apenas no primeiro trimestre de 2011.…”

Section: Figura 1 Rúmen Bovino Com Conteúdo Ruminal Após O Abate Do unclassified

Desenvolvimento de capim Xaraés e fertilidade de Latossolo Vermelho adubado com resíduo ruminal bovino

Trautmann-Machado

Pierangeli

Geron

et al. 2012

Rev. bras. eng. agríc. ambient.

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) of the dried bovine rumen residue (BRR) (90.00% DM) or wet (7.16% DM) with nitrogen content (N) of 1.43% in the DM, considering that only 33% of N of the BRR would be available to meet the requirement of Urochloa brizantha cv. Xaraés of 0, 50, 100 and 400 kg N ha -1 , on the fertility of an Oxisol (pH in water, exchangeable cations, P, N and organic matter) after 30 days of organic fertilization and on the production of dry biomass (BIO), height, levels of nitrogen (N) and crude protein (CP) after 60 and 120 days of cultivation of the Xaraés. A completely randomized design was used in 4 x 2 factorial (four doses of fertilizer BRR and two conditions of RRB dry matter) with three replications. The application of increasing doses of dry or wet BRR increased linearly (p < 0.05) the levels of N, P, K and organic matter of soil. Different doses of dry or wet BRR increased linearly (p <0.05) the dry BIO, the contents of N and CP of the grass Xaraés after 60 days of cultivation, but a quadratic effect (p < 0.05) was verified for the contents of N and CP of the grass Xaraés after 120 days of cultivation. Thus, the Urochloa brizantha cv. Xaraés presented higher production of dry BIO, regardless of the harvest period and the condition of the DM of BRR at the application time.

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“…Pérez et al (2013) also showed that the AR method performed better than the USEPA 3051 and 3051A methods in soils from Mato Grosso do Sul. However, Melo and Silva (2008) observed that the digestion method using AR yielded the lowest recovery rate when evaluating the effects of the digestion method on Cu, Mn and Zn recovery from organic waste.…”

Section: Introductionmentioning

confidence: 96%

“…Various studies have indicated significant differences in the quantity of metals recovered after using each method (Saldanha et al, 1997;Chen and Ma, 2001;Chander et al, 2008;Melo and Silva, 2008;Caires, 2009;Pérez et al, 2013;Santos and Alleoni, 2013), this situation requires choosing only one standard digestion method for purposes of comparison.…”

Section: Introductionmentioning

confidence: 99%

Comparing Methods for Extracting Heavy Metals from Histosols for Establishing Quality Reference Values

Lima

Amaral

Pérez

et al. 2016

Rev. Bras. Ciênc. Solo

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ABSTRACT:The diversity of methods for heavy metal extraction from soils complicates comparison of results used by environmental agencies to establish quality reference values. The aim of this study was to evaluate three soil digestion methods regarding the solubilizing capacity of Ba, Cr, Cu, Fe, Mn, Ni, Pb and Zn, and to propose a standard method to establish Quality Reference Values (QRVs) for Brazilian Histosols. Twenty soil samples were selected to evaluate the USEPA 3051, USEPA 3051A and Aqua Regia methods in a closed system. The methods tested were statistically similar regarding Cu, Fe and Mn extraction from soils. However, the methods can not be considered similar for Ba, Cr, Ni, Pb and Zn; Aqua Regia recorded the highest levels, except for Ba. The Aqua Regia method proved suitable for metal extraction from soils with organic characteristics and can be used to establish QRVs.

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Influência de métodos de digestão e massa de amostra na recuperação de nutrientes em resíduos orgânicos

Cited by 23 publications

References 9 publications

Mineralização de nitrogênio em latossolos adubados com resíduos orgânicos

Mineralização de nitrogênio em latossolos adubados com resíduos orgânicos

Desenvolvimento de capim Xaraés e fertilidade de Latossolo Vermelho adubado com resíduo ruminal bovino

Comparing Methods for Extracting Heavy Metals from Histosols for Establishing Quality Reference Values

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