Humic-like Substances in Organic Amendments and Effects on Native Soil Humic Substances

Senesi, N.; Miano, Teodoro; Brunetti, Gennaro

doi:10.1016/b978-044481516-3/50015-3

Cited by 133 publications

(140 citation statements)

References 74 publications

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“…As could be seen in the Table 3, the value of (a+b)/c could indirectly respond to the relative proportion of aliphatic C to aromatic C, which could be served as a good indicator of the degree of humification (Senesi et al, 1996). The change of (a+b)/c values told us the aromatic compounds in the residues treated by Tv and An emerged an increasing overall trend, which was consistent with the rule reflected by their H/C ratios.…”

Section: Ftir Spectrasupporting

confidence: 64%

Compositions and properties of microbial residues formed by three single species fungi and mixed strains in cellulose-containing liquid media

Wang

Dou

Yu³

et al. 2014

J. Soil Sci. Plant Nutr.

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The microbial residues, due to their closely connection with humic substances (HS), aroused our considerable interest. The method of shake-flask in liquid culture was adopt to accumulate them, in which the cellulose served as the sole C source. The microbial suspensions including Trichoderma viride (Tv), Aspergillus niger (An), Penicillium (P) and mixed strains (Ms) were inoculated into the cellulose culture fluid respectively. The incubation was performed for 70 days at a constant temperature of 28 ºC. The results showed that different microbial treatments had different effects on the C turnover in the cellulose fluid, among which Ms performed the most effective role in accumulating microbial residue and consuming organic C of cell metabolic product, Tv followed. As compared to cellulose, large amounts of inorganic N in the fluid could be transferred into the organic N components of residue. In the mean time, the proportion of aromatic rings could be increased at the cost of losing O-containing groups. Specifically, the degrees of condensation were enhanced by Tv and An, however their degrees of oxidation were inhibited. On the contrary, the P and Ms treatments had a significant advantage in the oxydative degradation of cellulose. Although some intermediate products (polysaccharides, phenolic compounds, carboxylic groups and syringyl units etc.) of HS could be detected in the microbial residues treated by Tv and An, their organic molecules did not still achieve the polymerization degree of real HS.

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Section: Ftir Spectrasupporting

confidence: 64%

Compositions and properties of microbial residues formed by three single species fungi and mixed strains in cellulose-containing liquid media

Wang

Dou

Yu³

et al. 2014

J. Soil Sci. Plant Nutr.

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“…Synchronous fluorescence can provide better sensitivity and improved peak resolution compared to the conventional emission fluorescence technique, and possibly allows differentiation of the fluorescence spectra of samples of different origins (Senesi et al 1996;Chen et al 2002Chen et al , 2003Fernández et al 2009). …”

Section: Resultsmentioning

confidence: 99%

“…Excitation spectra were recorded over the range of 300-480 nm at a fixed emission wavelength of 520 nm. Synchronousscan excitation spectra were measured by simultaneously scanning both the excitation and the emission wavelength (from 200 to 600 nm), while maintaining a constant, optimized wavelength difference ∆λ = λ em -λ ex = 20 nm, and for LH ∆λ = 60 (Senesi et al 1996;Plaza et al 2006;Pedra et al 2008). The Total Luminescence (TL) spectra were obtained in the form of excitation/emission matrix (EEM) by scanning the wavelength emission over the range of 300-600 nm, also the excitation wavelength was in 5 nm steps from 300 to 600 nm (Alberts & Takács 2004;Palazzo et al 2008;Fernández et al 2009).…”

Section: Methodsmentioning

confidence: 99%

Spectral characterization of selected humic substances

Enev¹,

Pospíšilová²,

Klučáková³

et al. 2014

Soil & Water Res.

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Enev V., Pospíšilová L., Klučáková M., Liptaj T., Doskočil L. (2014): Spectral characterization of selected humic substances. Soil & Water Res., 9: 9-17.Current concern for soil quality has stimulated research on soil organic matter (OM). Humic substances (HS) of different origin were compared applying ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy (FTIR), "steady-state" fluorescence spectroscopy, and 13 C nuclear magnetic resonance ( 13 C NMR).Sodium humates samples were isolated from soil (Gleyic Luvisol), compost, and South-Moravian lignite from the mine Mír in Mikulčice. Sodium humates (SH) were extracted by a conventional procedure recommended by the International Humic Substances Society (IHSS). Results showed that the presence of O-containing functional groups (carbonyl in aldehydes and ketones, carboxyl in carboxylic acids, ester and ether groups) are in the order of compost > soil > lignohumate > lignite. Further, results of FTIR, fluorescence spectroscopy, and 13 C NMR suggested that samples of sodium humates isolated from soil, compost, and lignite were a more polycondensed, oxidized, unsaturated, humified, and aromatic structure. On the other hand, commercial lignohumate (LH) had very simple structural components and wide molecular heterogeneity. Furthermore, a small molecular size and weight, low degree of aromatic polycondensation, low level of conjugated chromophores and fluorophores, and low humification degree were characteristic for commercial LH. It should be noted that the sample of commercial LH was characterized by 13 C NMR analysis with a slightly higher value of aromaticity α in comparison with the sample of compost. The application of non-destructive analytical methods such as UV-VIS, FTIR, 13 C NMR, and fluorescence spectroscopy help us to provide main characteristics of selected humic substances.

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“…Segundo Senesi et al (1996), em áreas adubadas com lodo de esgoto, torna-se necessário o estudo da composição química da matéria orgânica e, principalmente, das substâncias húmicas presentes nesse resíduo, já que as frações húmicas são indicadores da maturação e da estabilidade do lodo de esgoto. De acordo com Rovira et al (2002), é preciso investigar também o efeito de doses de lodo de esgoto sobre a natureza química de substâncias húmicas extraídas de solos tratados com o resíduo.…”

Section: Introductionunclassified

Infravermelho na caracterização de ácidos húmicos de latossolo sob efeito de uso contínuo de lodo de esgoto

Dias

Silva²,

Soares³

et al. 2009

Rev. Bras. Ciênc. Solo

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RESUMOObjetivou-se caracterizar, por meio de espectroscopia no infravermelho com transformada de Fourier (IVTF), possíveis mudanças na natureza química de ácidos húmicos (AHs) extraídos de amostras de Latossolo (0-10 cm) do Campo Experimental da Embrapa Meio Ambiente, em Jaguariúna (SP). Os dados foram obtidos após seis cultivos de milho e a aplicação de doses variáveis de lodo de esgoto de Barueri (LB) (base seca), conforme os tratamentos avaliados: LB0, LB1, LB2, LB4 e LB8, sendo 0, 1, 2, 4 e 8 vezes a necessidade de N para o milho. Como referência, foi amostrada uma área sob mata. Foram obtidos espectros de ácidos húmicos e do lodo de esgoto utilizado no experimento, e calculados os índices de hidrofobicidade (IH) e de condensação (IC) nas amostras de ácidos húmicos. Foram notadas pequenas alterações na natureza química de AHs de áreas tratadas com lodo de esgoto, em relação à testemunha. Os AHs apresentam grupos aromáticos, -OH fenólicos, -COOH, estruturas alifáticas, carboidratos e impurezas minerais. O uso contínuo de elevadas doses de LB reduziu a concentração de C-alifático e o grau de condensação dos ácidos húmicos, o que sinaliza que há frações orgânicas

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Humic-like Substances in Organic Amendments and Effects on Native Soil Humic Substances

Cited by 133 publications

References 74 publications

Compositions and properties of microbial residues formed by three single species fungi and mixed strains in cellulose-containing liquid media

Compositions and properties of microbial residues formed by three single species fungi and mixed strains in cellulose-containing liquid media

Spectral characterization of selected humic substances

Infravermelho na caracterização de ácidos húmicos de latossolo sob efeito de uso contínuo de lodo de esgoto

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