scholarly journals Ecosystem type effects on the stabilization of organic matter in soils: Combining size fractionation with sequential chemical extractions

Geoderma ◽  
2019 ◽  
Vol 353 ◽  
pp. 423-434 ◽  
Author(s):  
Beatrice Giannetta ◽  
César Plaza ◽  
Claudio Zaccone ◽  
Costantino Vischetti ◽  
Pere Rovira
Keyword(s):  
Organic Matter ◽  
Size Fractionation ◽  
Chemical Extractions

Effect of size-fractionation dissolved organic matter on the mobility of prometryne in soil

Chemosphere ◽  
2010 ◽  
Vol 79 (11) ◽  
pp. 1046-1055 ◽  
Author(s):  
Guang Chen ◽  
Chao Lin ◽  
Liang Chen ◽  
Hong Yang
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Size Fractionation

Size fractionation and optical properties of dissolved organic matter in the continuum soil solution-bog-river and terminal lake of a boreal watershed

2014 ◽  
Vol 66 ◽  
pp. 14-24 ◽  
Author(s):  
Svetlana M. Ilina ◽  
Olga Yu. Drozdova ◽  
Sergey A. Lapitskiy ◽  
Yuriy V. Alekhin ◽  
Vladimir V. Demin ◽  
...  
Keyword(s):  
Organic Matter ◽  
Optical Properties ◽  
Dissolved Organic Matter ◽  
Soil Solution ◽  
Size Fractionation ◽  
The Continuum

A routine method to study soil organic matter by particle‐size fractionation: Examples for tropical soils

1995 ◽  
Vol 26 (11-12) ◽  
pp. 1749-1760 ◽  
Author(s):  
E. Gavinelli ◽  
C. Feller ◽  
M.C. Larré‐Larrouy ◽  
B. Bacye ◽  
N. Djegui ◽  
...  
Keyword(s):  
Particle Size ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Tropical Soils ◽  
Routine Method ◽  
Size Fractionation ◽  
Particle Size Fractionation

Size Fractionation of Trace Elements in a Seasonally Stratified Boreal Lake: Control of Organic Matter and Iron Colloids

2012 ◽  
Vol 18 (2) ◽  
pp. 115-139 ◽  
Author(s):  
O. S. Pokrovsky ◽  
L. S. Shirokova ◽  
S. A. Zabelina ◽  
T. Ya. Vorobieva ◽  
O. Yu. Moreva ◽  
...  
Keyword(s):  
Trace Elements ◽  
Organic Matter ◽  
Size Fractionation ◽  
Boreal Lake

Activité phosphatasique de quelques sols tropicaux à argile 1: 1. Répartition dans les fractions granulométriques

1994 ◽  
Vol 74 (2) ◽  
pp. 121-129 ◽  
Author(s):  
C. Feller ◽  
E. Frossard ◽  
M. Brassard
Keyword(s):  
Particle Size ◽  
Organic Matter ◽  
Phosphatase Activity ◽  
Mineral Soil ◽  
Clay Fraction ◽  
Continuous Cultivation ◽  
Clay Soils ◽  
Size Fractionation ◽  
Particle Size Fractionation ◽  
Low Activity

The objectives of this work were: (i) to study the acid monophosphoesterase activity (pH 6.5) of the surface horizons of low-activity tropical clay soils (West Africa, West Indies, Brazil), cultivated or uncultivated, with widely different textures and organic matter (OM) contents, (ii) to measure the phosphatase activity (Pase) in the organic and organo-mineral soil fractions obtained by particle size fractionation. Pase was most significantly correlated to the soil OM content and to a lesser extent to the texture and total P content. Therefore, any modification in soil management resulting in important changes in soil OM contents, leads to important variations in phosphatase activity: Pase decreases after clearing of the native vegetation and continuous cultivation, Pase increase when grass-fallows or meadows succeed to annual cropping. The Pase of all the size fractions (20–2000 μm, 2–20 μm and 0–2 μm) was controled by their OM content. However, the "potential Pase" defined as the ratio Pase/C was higher in the 20- to 2000-μm and 0- to 2-μm fractions than in the 2–20 μm ones This is attributed to a higher Pase renewal by root restitutions in the plant debris fraction (20–2000 μm) and by microbial activity and microbial metabolites in the organo-clay fraction (0–2 μm). More than 50% of the soil total Pase was associated with fractions coarser than 2 μm. Most of the changes in Pase (75–100%) associated with the cultivation were ascribed to these fractions. This illustrate the probably important role of the fractions coarser than 2 μm in the phosphorus dynamics in these soils. Key words: Phosphomonoesterase, organic matter, particle size fractionation, low-activity tropical clay soils

Using a sequential density and particle-size fractionation to evaluate carbon and nitrogen storage in the profile of tilled and no-till soils in eastern Canada

2009 ◽  
Vol 89 (3) ◽  
pp. 255-267 ◽  
Author(s):  
E G Gregorich ◽  
M R Carter ◽  
D A Angers ◽  
C F Drury
Keyword(s):  
Particle Size ◽  
Organic Matter ◽  
Prince Edward Island ◽  
Sandy Loam ◽  
Soil Tillage ◽  
Size Fractionation ◽  
Eastern Canada ◽  
No Till ◽  
Particle Size Fractionation ◽  
C And N

Tillage influences the retention and storage of organic matter (OM) in soil. We used a sequential density and particle-size fractionation to evaluate the total quantity and distribution of organic carbon (C) and nitrogen (N) in the profile of soils under mouldboard ploughing and no-till. Cores (0-60 cm) from four long-term tillage studies (in Prince Edward Island, Quebec, and two sites in Ontario) on soils of different textures, from sandy loam to clay were collected and divided into six depth increments. Four soil OM fractions were isolated on the basis of size and density from each sample. At two sites the standing stocks of C and N were larger in tilled than in no-till soil profiles at depths slightly greater than plough depth; tillage effects were also evident at a third site, where the mass of C in a layer close to the depth of ploughing was greater in tilled soils. Ploughing also had a substantial and consistent positive effect in all four soils on the quantity of C (and in some cases N) protected within aggregates, particularly at or near the bottom of the plough layer, and sometimes in surface soil layers. We attribute differences observed in whole soil C and N due to tillage mostly to differences in mineral-associated OM, particularly in soils with heavier textures, but the other size and density fractions could, together, account for as much as 25% of the difference. Because the C capacity level was not reached in heavy-textured soils, these soils show greater potential for further accumulation of C in the soil profile than coarse-textured soils, especially near the bottom of the plough layer.Key words: Light fraction, soil organic matter, soil tillage, physically-protected organic matter, no-till, soil texture

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