Direct Determination of Organic Carbon by Dry Combustion in Soils with Carbonates

Santi, C. A.; Certini, Giacomo; D’Acqui, Luigi Paolo

doi:10.1080/00103620500403531

Cited by 72 publications

(32 citation statements)

References 10 publications

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“…In the laboratory, the forest floor was suspended in deionised water to separate the floating litter from the numerous organo-mineral aggregates apparently formed by earthworm activity. The litter and aggregates so obtained, and the mineral topsoil were oven-dried (60°C), weighted, finely ground by a ball-mill and analysed for organic C and total N with a CHN analyzer (Carlo Erba NA 1500) following the procedure of Santi et al (2006). Concentration values in g kg − 1 for the mineral soil were converted to kg m − 2 using the calculated bulk density.…”

Section: Methodsmentioning

confidence: 99%

Effects of associating a N-fixer species to monotypic oak plantations on the quantity and quality of organic matter in minesoils

et al. 2007

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Section: Methodsmentioning

confidence: 99%

Effects of associating a N-fixer species to monotypic oak plantations on the quantity and quality of organic matter in minesoils

et al. 2007

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“…An ancillary purpose of this work was to determine what components of SOM resist the dichromate oxidation required in the original version of the Walkley-Black (Walkley and Black 1934), a widely used method to measure soil organic C. This method does not require external heating, exploiting the heat of dilution of potassium dichromate with concentrated sulphuric acid. As a consequence, it does not succeed in oxidising all organic C and the incomplete recovery is taken into account by using a correction factor, which often is 1.3 (Nelson and Sommers 1996;Santi et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic properties of bulk and dichromate oxidation resistant soil organic matter from an anthroposequence in a Mediterranean environment

et al. 2007

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The shallow soils of Pianosa-a small calcareous island in the Mediterranean Sea, facing Tuscany, central Italy-developed under the same pedogenic factors with the exception of vegetation and, in the last two centuries, human impact. Originally, they were covered by ''macchia,'' a tangled mix of bushy species, or, in a few more fertile sites, by Quercus ilex L. Currently there are six land uses on the island: (1) pristine macchia, (2) groves of Olea europaea L. totally reinvaded by macchia, (3) degraded residual thickets of Q. ilex, (4) cropland, (5) recently abandoned pastures, and (6) stands of Pinus halepensis Mill. The related soils were analysed by solid-state cross polarisation/magic angle spinning 13 C-nuclear magnetic resonance (NMR) to compare the spectroscopic properties of their organic pool. The prevalence of O-alkyl C over other C forms is evident in all cases, while there is large variability with respect to the alkyl C to aromatic C ratio between both the different soils, and the horizons of a same soil. On the whole, the results show that on Pianosa Island, human impact has profoundly altered not only the amount but also the quality of soil organic matter (SOM). The SOM residual of the dichromate oxidation in the Walkley-Black method-a widely used method to measure soil organic C-was also analysed by NMR. It comprised almost exclusively alkyl C and aromatic C, as a result of the removal of carbonyl and O-alkyl C. Most of the aromatic C seems to belong to charcoal.

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“…Soil pH was measured with a glass electrode in a 1:2 soil to deionized water ratio (Hendershot et al 1993). Organic C was measured by dry combustion using a Carlo Erba NA 1500 CNS Analyzer (Milan, Italy) as described by Santi et al (2006). Available P was extracted by Mehlich-3 method (Mehlich 1984).…”

Section: Methodsmentioning

confidence: 99%

“…The percentage of the applied P recovered in the effluent ranged from (2.3 to 14% in the Osborne soil and from (3.73 to 2.49% in the Lakeland soil (Table 3). Although the percent recovery was small it is nevertheless significant as a low concentration of P is required to trigger eutrophication of surface water (Owens et al 1998;Sharpley et al 1999). Sharpley et al (1999) reported that a P concentration above 0.02 mg L…”

Section: Total P Elution As Influenced By Amendment Types and Applicamentioning

confidence: 99%

Elution of inorganic and organic phosphorus from surface applied organic amendments

Idowu¹,

Ige²,

Akinremi³

2008

Can. J. Soil. Sci.

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. 2008. Elution of inorganic and organic phosphorus from surface-applied organic amendments. Can. J. Soil Sci. 88: 709Á718. Understanding the effects of organic amendments on the movement of organic and inorganic phosphorus (P) in soils is important for effective P management in agricultural soils. Thus, the effects of beef cattle manure, hog manure and biosolids on the downward movement of organic (P org ) and inorganic (Pi) P in Lakeland and Osborne soils were investigated. The amendments were added to the soils at the rate of 0, 200, 400 and 800 kg P ha(1 by mixing with the top 1 cm of soil in a column. The column was eluted with 20 pore volumes (PV) of 0.01 M CaCl 2 . The amount of total P (P T ), P org and Pi in the effluent was determined. The concentrations of P org and Pi in the effluent increased as the rate of amendment application increased. A greater percentage of P T was lost as Pi in the soils amended with hog manure and biosolids, while in the soil amended with beef cattle manure, P org constituted a greater portion of the total P eluted. As much as 63% of total P eluted from the Lakeland soil at the highest rate of beef cattle manure was in the form of P org . Lakeland soil retained more Pi than the Osborne soil due to its greater P retention capacity. Organic P was lost within the 2nd and the 4th PV in the two soils, which illustrated the ease of P org movement through the soil. In conclusion, both organic and inorganic P can move through the soil in organically amended soils and the risk of losing organic P by leaching is greater in soils amended with high rates of beef cattle manure.Key words: Biosolids, hog manure, beef cattle manure, elution, organic phosphorus, inorganic phosphorus. É lution du phosphore inorganique et organique des amendements organiques applique´s en surface. Can. J. Soil Sci. 88: 709Á718. Il importe de comprendre l'incidence des amendements organiques sur le mouvement du phosphore (P) organique et inorganique dans le sol si l'on veut bien ge´rer cet e´le´ment dans les sols agricoles. C'est pourquoi les chercheurs se sont inte´resse´s aux effets du fumier de bovin, du fumier de porc et des biosolides sur le de´placement vertical du P organique (P org ) et inorganique (Pi) dans les sols Lakeland et Osborne. À cette fin, ils ont ajoute´les amendements au sol a`raison de 0, 200, 400 et 800 kg de P par hectare, en me´langeant le premier centime`tre de sol a`une colonne. Ils ont ensuite e´lue´la colonne avec 20 fois le volume d'un pore de CaCl 2 a`0,01 M, puis ont calcule´la quantite´totale de P (P T ), de P org et de Pi se retrouvant dans l'effluent. La concentration de P org et de Pi dans l'effluent augmente avec le taux d'application de l'amendement. Les sols bonifie´s avec du fumier de porc ou des biosolides perdent plus de P T sous forme de Pi, tandis que ceux amende´s avec du fumier de bovin perdent surtout du P sous forme de P org . Au taux d'application le plus e´leve´du fumier de bovin, le sol Lakehead a perdu jusqu'a`63 % de son P sous forme organique. Le sol Lakelan...

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Direct Determination of Organic Carbon by Dry Combustion in Soils with Carbonates

Cited by 72 publications

References 10 publications

Effects of associating a N-fixer species to monotypic oak plantations on the quantity and quality of organic matter in minesoils

Effects of associating a N-fixer species to monotypic oak plantations on the quantity and quality of organic matter in minesoils

Spectroscopic properties of bulk and dichromate oxidation resistant soil organic matter from an anthroposequence in a Mediterranean environment

Elution of inorganic and organic phosphorus from surface applied organic amendments

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